| [1] |      | Thermodynamics-based Artificial Neural Networks for constitutive modeling, Filippo Masi, Ioannis Stefanou, Paolo Vannucci, Victor Maffi-Berthier, Journal of the Mechanics and Physics of Solids, Vol. 147, number 104277, issue 1 (2021), doi:10.1016/j.jmps.2020.104277
| Machine Learning methods and, in particular, Artificial Neural Networks (ANNs) have demonstrated promising capabilities in material constitutive modeling. One of the main drawbacks of such approaches is the lack of a rigorous frame based on the laws of physics. This may render physically inconsistent the predictions of a trained network, which can be even dangerous for real applications. Here we p...
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| [2] | | Data-Driven multiscale modeling in mechanics, K. Karapiperis, L. Stainier, M. Ortiz, J. E. Andrade, Journal of the Mechanics and Physics of Solids, Vol. 147, number 104239 (2021), doi:10.1016/j.jmps.2020.104239
| We present a Data Driven framework for multiscale mechanical analysis of materials. The proposed framework relies on the Data Driven formulation in mechanics (Kirchdoerfer and Ortiz 2016), with the material data being directly extracted from lower scale computations. Particular emphasis is placed on two key elements: the parametrization of material history, and the optimal sampling of the mechanic...
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| [3] | | Calcined clay Limestone cements: Hydration processes with high and low-grade kaolinite clays, Guillemette Cardinaud, Emmanuel Roziere, Olivier Martinage, Ahmed Loukili, Laury Barnes-Davin, Michael Paris, Dimitri Deneele, Construction and Building Materials, Vol. 277, number 122271, issue 10 (2021), doi:10.1016/j.conbuildmat.2021.122271
| The development of ternary binders based on limestone and calcined clays appear as a promising way to increase the substitution of clinker. Their production is likely to remain limited if highly kaolinitic clays are required, but calcined clays with low metakaolin content are less reactive in a binary binder, as shown in many previous studies. This study focused on the difference, regarding hydrat...
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| [4] | | Early age autogenous shrinkage cracking risk of an ultra-high performance concrete (UHPC) wall: Modelling and experimental results, J. Kheir, A. Klausen, T. A. Hammer, L. De Meyst, B. Hilloulin, K. Van Tittelboom, A. Loukili, N. De Belie, Engineering Fracture Mechanics, Vol. 257, number 108024, issue 1 (2021), doi:10.1016/j.engfracmech.2021.108024
| Ultra High Performance Concrete (UHPC) exhibits high autogenous shrinkage (AS) which significantly increases the risk of early age cracking. To predict the risks of early age shrinkage cracking of environmentally friendly CEM III based UHPC, a numerical model originally developed for early age crack assessment of ordinary concrete, has been further developed and applied on a demonstration wall wit...
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| [5] | | A Review of SandClay Mixture and SoilStructure Interface Direct Shear Test, Kexin Yin, Anne Laure Fauchille, Eugenia Di Filippo, Panagiotis Kotronis, Giulio Sciarra, Geotechnics, Vol. 1, issue 2, pp. 260-306 (2021), doi:10.3390/geotechnics1020014
| Natural soils are usually heterogeneous and characterized with complex microstructures. Sandclay mixtures are often used as simplified soils to investigate the mechanical properties of soils with various compositions (from clayey to sandy soils) in the laboratory. Performing laboratory tests on a sandclay mixture with definite clay fraction can provide information to understand the simplified soil...
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| [6] | | Finite element solver for data-driven finite strain elasticity, Auriane Platzer, Adrien Leygue, Laurent Stainier, Michael Ortiz, Computer Methods in Applied Mechanics and Engineering, Vol. 379, number 113756, issue 4 (2021), doi:10.1016/j.cma.2021.113756
| A nominal finite element solver is proposed for data driven finite strain elasticity. It bypasses the need for a constitutive model by considering a database of deformation gradient/first PiolaKirchhoff stress tensors pairs. The boundary value problem is reformulated as the constrained minimization problem of the distance between (i) the mechanical states, i.e. strainstress, in the body and (ii) t...
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| [7] | | Out-of-plane permeability measurement for reinforcement textiles: A benchmark exercise, A. X.H. Yong, A. Aktas, D. May, A. Endruweit, S. Advani, P. Hubert, S. G. Abaimov, D. Abliz, I. Akhatov, M. A. Ali, T. Allen, D. C. Berg, S. Bickerton, C. Brauner, D. Brutsch, B. Caglar, H. Caglar, P. Causse, A. Chiminelli, A. Cohades, S. Comas-Cardona, M. Danzi, J. Dittmann, C. Dransfeld, P. Ermanni, E. Fauster, J. A. Garcia-Manrique, A. George, R. Graupner, V. Grishaev, A. Guilloux, M. Hancioglu, W. Harizi, T. Herman, W. Huang, M. A. Kabachi, A. Keller, K. Kind, M. Laspalas, O. V. Lebedev, M. Lizaranzu, A. C. Long, K. Masania, V. Michaud, P. Middendorf, D. Salvatori, R. Schubnel, N. Sharp, M. Sozer, J. Thomas, F. Trochu, R. Umer, J. Valette, J. H. Wang, B. Willenbacher, Composites Part A Applied Science and Manufacturing, Vol. 148, number 106480, issue 1 (2021), doi:10.1016/j.compositesa.2021.106480
| The out of plane permeability of two glass fibre fabrics was measured by 26 institutions using silicone oil as a test fluid. Participants in this study were free to select the test procedure, specimen dimensions and data analysis method, provided that testing was carried out at three target fibre volume fractions, 46%, 50% and 54%. While results showed a variability of two orders of magnitude betw...
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| [8] | | Model-free data-driven computational mechanics enhanced by tensor voting, Robert Eggersmann, Laurent Stainier, Michael Ortiz, Stefanie Reese, Computer Methods in Applied Mechanics and Engineering, Vol. 373, number 113499, issue 1 (2021), doi:10.1016/j.cma.2020.113499
| The data driven computing paradigm initially introduced by Kirchdoerfer and Ortiz (2016) is extended by incorporating locally linear tangent spaces into the data set. These tangent spaces are constructed by means of the tensor voting method introduced by Mordohai and Medioni (2010) which improves the learning of the underlying structure of a data set. Tensor voting is an instance based machine lea...
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| [9] | | Linking multi-scale 3D microstructure to potential enhanced natural gas recovery and subsurface CO2storage for Bowland shale, UK, Lin Ma, Anne Laure Fauchille, Humera Ansari, Michael Chandler, Paul Ashby, Kevin Taylor, Ronny Pini, Peter D. Lee, Energy and Environmental Science, Vol. 14, issue 8, pp. 4481-4498 (2021), doi:10.1039/d0ee03651j
| Injection of CO2 into shale reservoirs to enhance gas recovery and simultaneously sequester greenhouse gases is a potential contributor towards the carbon neutral target. It offers a low carbon, low cost, low waste and large scale solution during the energy transition period. A precondition to efficient gas storage and flow is a sound understanding of how the shale's micro scale impacts on these p...
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| [10] | | Seismic behavior & risk assessment of an existing bridge considering soil-structure interaction using artificial neural networks, Mohammed Rachedi, Mohammed Matallah, Panagiotis Kotronis, Engineering Structures, Vol. 232, number 111800 (2021), doi:10.1016/j.engstruct.2020.111800
| The Peak Ground Acceleration (PGA) is extensively used in earthquake engineering practice to describe the ground motion characteristics for establishing the seismic vulnerability curves. However, a single parameter is not enough to describe the seismic excitation and does not allow expressing the complex relationship between the structural damage and the ground movement. Motivated to overcome thes...
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| [11] | | Experimental characterisation of textile compaction response: A benchmark exercise, A. X.H. Yong, A. Aktas, D. May, A. Endruweit, S. V. Lomov, S. Advani, P. Hubert, S. G. Abaimov, D. Abliz, I. Akhatov, M. A. Ali, S. Allaoui, T. Allen, D. C. Berg, S. Bickerton, B. Caglar, P. Causse, A. Chiminelli, S. Comas-Cardona, M. Danzi, J. Dittmann, C. Dransfeld, P. Ermanni, E. Fauster, A. George, J. Gillibert, Q. Govignon, R. Graupner, V. Grishaev, A. Guilloux, M. A. Kabachi, A. Keller, K. Kind, D. Large, M. Laspalas, O. V. Lebedev, M. Lizaranzu, A. C. Long, C. Lopez, K. Masania, V. Michaud, P. Middendorf, P. Mitschang, S. van Oosterom, R. Schubnel, N. Sharp, P. Sousa, F. Trochu, R. Umer, J. Valette, J. H. Wang, Composites Part A Applied Science and Manufacturing, Vol. 142, number 106243, issue 4 (2021), doi:10.1016/j.compositesa.2020.106243
| This paper reports the results of an international benchmark exercise on the measurement of fibre bed compaction behaviour. The aim was to identify aspects of the test method critical to obtain reliable results and to arrive at a recommended test procedure for fibre bed compaction measurements. A glass fibre 2/2 twill weave and a biaxial (±45°) glass fibre non crimp fabric (NCF) were tested in dry...
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| [12] | | Efficient data structures for model-free data-driven computational mechanics, Robert Eggersmann, Laurent Stainier, Michael Ortiz, Stefanie Reese, Computer Methods in Applied Mechanics and Engineering, Vol. 382, number 113855, issue 11 (2021), doi:10.1016/j.cma.2021.113855
| The data driven computing paradigm initially introduced by Kirchdoerfer & Ortiz (2016) enables finite element computations in solid mechanics to be performed directly from material data sets, without an explicit material model. From a computational effort point of view, the most challenging task is the projection of admissible states at material points onto their closest states in the material dat...
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| [13] | | Compaction Banding in High-Porosity Carbonate Rocks: 1. Experimental Observations, Youssouf Abdallah, Jean Sulem, Michel Bornert, Siavash Ghabezloo, Ioannis Stefanou, Journal of Geophysical Research Solid Earth, Vol. 126, number 43, issue 1 (2021), doi:10.1029/2020JB020538
| Identifying the mechanisms that control the formation of compaction bands is of high interest in reservoir mechanics since these structures may drastically affect the performance of geosystems operations. Considering the difficulty to identify compaction bands in carbonate samples tested in the laboratory, the Digital Volume Correlation technique is applied here and proves to be a relevant method....
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| [14] |  | Improving arc stability during wire arc additive manufacturing of thin-walled titanium components, Shakti Swaroop Choudhury, Surendar K. Marya, Murugaiyan Amirthalingam, Journal of Manufacturing Processes, Vol. 66, pp. 53-69 (2021), doi:10.1016/j.jmapro.2021.03.033
| Fabrication of thin walled titanium structures by a gas metal arc based wire arc additive manufacturing process is considered challenging due to arc instability. This instability is primarily caused by the cathode spot oscillations. In this work, attempts were made to improve the cathode spot stability by using a surface oxidised titanium feedstock. The deposition behaviour was analysed by a high ...
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| [15] | | Microstructural investigation of slag-blended UHPC: The effects of slag content and chemical/thermal activation, Omar M. Abdulkareem, Amor Ben Fraj, Marwen Bouasker, Lahcen Khouchaf, Abdelhafid Khelidj, Construction and Building Materials, Vol. 292, number 123455, issue 9 (2021), doi:10.1016/j.conbuildmat.2021.123455
| This paper focuses on the microstructural investigation of ultra high performance concrete (UHPC) mixtures featuring various replacement levels for blast furnace slag (BFS), in the aim of becoming more environmentally friendly. Three levels of slag are applied (namely 30%, 50% and 80%) per unit volume of cement. The microstructural characteristics examined included X ray diffraction (XRD) analysis...
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| [16] | | Solid and 3D beam finite element models for the nonlinear elastic analysis of helical strands within a computational homogenization framework, Fabien Menard, Patrice Cartraud, Computers and Structures, Vol. 257, number 106675 (2021), doi:10.1016/j.compstruc.2021.106675
| This paper proposes a computational approach for studying the overall behaviour and local stress state of strand type structures. This method is based on the homogenization theory of periodic beamlike structures, with the local problem posed on the strand axial period being solved using the finite element method. This approach fully utilises the strand's helical symmetry, thus minimising the size ...
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| [17] | | Experimental study of hard marine growth effect on the hydrodynamical behaviour of a submarine cable, A. Marty, C. Berhault, G. Damblans, J. V. Facq, B. Gaurier, G. Germain, T. Soulard, F. Schoefs, Applied Ocean Research, Vol. 114, number 102810, issue 5 (2021), doi:10.1016/j.apor.2021.102810
| Submarine cables such as electrical umbilical power cables for floating wind turbines are subject to biofouling which can have an important effect on their dynamical behaviour under wave and current conditions by drastically increasing their size and mass. The impact of biofouling on the dynamic behaviour of an underwater power cable characterized by the hydrodynamic coefficients, such as drag and...
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| [18] | | On the attraction power of critical state in granular materials, Na Deng, Antoine Wautier, Yannick Thiery, Zhen Yu Yin, Pierre Yves Hicher, Francois Nicot, Journal of the Mechanics and Physics of Solids, Vol. 149, number 104300, issue 2 (2021), doi:10.1016/j.jmps.2021.104300
| The aim of this paper is to offer a fresh perspective on the classic concept of critical state (CS) in granular materials by suggesting that CS can be defined through the use of a single proportional strain test. In classic conventional testing, CS manifests itself under constant lateral stress and controlled strain in one given direction whenever continuous shearing is applied without change bein...
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| [19] | | A quantitative assessment of the parameters involved in the freezethaw damage of cement-based materials through numerical modelling, Abderrahmane Rhardane, Sara Al Haj Sleiman, Syed Yasir Alam, Frederic Grondin, Construction and Building Materials, Vol. 272, number 121838, issue 2 (2021), doi:10.1016/j.conbuildmat.2020.121838
| Degradation of concrete due to freezethaw cycles is a subject that is still debated. For many years, some predictive models have been developed by taking into account the physics, but the choice of parameters which drive the frost kinetics and the couplings are often arbitrarily chosen to fit experimental measurements. Moreover, recalibration becomes necessary each time the mix design or the envir...
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| [20] | | Probabilistic failure analysis, performance assessment, and sensitivity analysis of corroded reinforced concrete structures, Hongyuan Guo, You Dong, Emilio Bastidas-Arteaga, Xiang Lin Gu, Engineering Failure Analysis, Vol. 124, number 105328, issue 1532 (2021), doi:10.1016/j.engfailanal.2021.105328
| A better understanding of the mechanical performance and the failure modes of corroded reinforced concrete (RC) structures is crucial for implementing measures that reduce failure risk. Therefore, this paper proposes a probabilistic numerical framework to estimate the structural performance and to identify the failure modes as well as the main parameters affecting the safety of corroded RC structu...
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| [21] | | A study of suffusion kinetics inspired from experimental data: comparison of three different approaches, A. Kodieh, R. Gelet, D. Marot, A. Z. Fino, Acta Geotechnica, Vol. 16, issue 2, pp. 347-365 (2021), doi:10.1007/s11440-020-01016-5
| Suffusion is a complex phenomenon characterized by a selective migration of the fine particles under the effect of three coupled processes: detachment, transport and possible filtration of the fine fraction. With the objective to reproduce the kinetics of the suffusion process, a new energy based constitutive relationship, inspired from the energy based approach, is proposed. Moreover, this energy...
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| [22] | | Reusing calcined sediments from Chorfa II dam as partial replacement of cement for sustainable mortar production, Rachid Hadj Sadok, Nadia Belas, Mahfoud Tahlaiti, Ridha Mazouzi, Journal of Building Engineering, Vol. 40, number 102273 (2021), doi:10.1016/j.jobe.2021.102273
| Dam siltation is an alarming problem that significantly affects the dam's lifetime and water storage capacity. In Algeria, the removal of dredged sediment has become a significant environmental impact and an economic issue. In this context, the utilization of calcined sediments as an artificial pozzolanic material could reduce greenhouse gas emissions in the cement industry. This paper addresses t...
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| [23] | | Determination of the origin of the strength regain after self-healing of binary and ternary cementitious materials including slag and metakaolin, Carol Youssef Namnoum, Benoit Hilloulin, Frederic Grondin, Ahmed Loukili, Journal of Building Engineering, Vol. 41, number 102739, issue 6 (2021), doi:10.1016/j.jobe.2021.102739
| A mechanical assessment of the self healing process of complex cementitious materials with mineral additions is presented. Mortars made with binary and ternary binders (blast furnace slag, fly ash and metakaolin) to reach 30 vol% substitution ratios were prepared, and then small cracks with a width of 10 m were created at the age of 2 days. After a 26 day healing period, mechanical properties obta...
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| [24] | | Eco-design of spirulina solar cultivation: Key aspects to reduce environmental impacts using Life Cycle Assessment, Camilo Duran Quintero, Anne Ventura, Olivier Lepine, Jeremy Pruvost, Journal of Cleaner Production, Vol. 299, number 126741 (2021), doi:10.1016/j.jclepro.2021.126741
| To identify action levers that improve the environmental balance of Spirulina manufacture, this work presents an LCA study of a modelled Spirulina production coupled with Morris sensitivity analysis on the model parameters. The study concerns a hypothetical cultivation surface of 388.5 m2 in open and covered raceway ponds (ORP and CRP) under greenhouse located in the city of Nantes in F...
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| [25] | | Earth buildings with local materials: Assessing the variability of properties measured using non-destructive methods, Mircea Barnaure, Stephanie Bonnet, Philippe Poullain, Construction and Building Materials, Vol. 281, number 122613, issue 1 (2021), doi:10.1016/j.conbuildmat.2021.122613
| The study focuses on analysing the variability of the properties for earthen materials constructed with traditional methods. Non destructive tests are conducted on two material formulations: raw earth and raw earth mixed with hemp shives and reed. Raw earth samples exhibit coefficients of variation of 3.7%, 17.8%, 9.6%, 27.0% and 12.8% for density, electrical resistivity, thermal conductivity, vol...
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| [26] | | Investigation of deposition strategy on wire and arc additive manufacturing of aluminium components, Matthieu Rauch, Uzoma Vincent Nwankpa, Jean Yves Hascoet, Journal of Advanced Joining Processes, Vol. 4, number 100074 (2021), doi:10.1016/j.jajp.2021.100074
| Wire and Arc Additive Manufacturing (WAAM) is known for its higher deposition rate and its ability to manufacture medium large scale components compared to other related techniques. However, the manufacturing of small to large scale structures would require a choice of deposition strategies to implement. Parallel and oscillation deposition is implored for structures with large widths that cannot b...
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| [27] | | Effect of fiber reinforcement on the compression and flexural strength of fiber-reinforced geopolymers, Micha ach, Bartomiej Kluska, Damian Janus, Dawid Kabat, Kinga Pawecka, Kinga Korniejenko, Martin Duarte Guigou, Marta Choinska, Applied Sciences Switzerland, Vol. 11, number 10443, issue 21 (2021), doi:10.3390/app112110443
| This work aimed to determine the effect of the addition of different types of reinforcing fibers on the strength properties of geopolymers such as flexural and compressive strength. Geopoly mers are an attractive alternative to conventional binders and building materials; however, one of the main problems of their widespread use is their low resistance to brittle fracture. To improve the mechanica...
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| [28] | | In-situ synchrotron characterisation of fracture initiation and propagation in shales during indentation, Lin Ma, Anne Laure Fauchille, Michael R. Chandler, Patrick Dowey, Kevin G. Taylor, Julian Mecklenburgh, Peter D. Lee, Energy, Vol. 215, number 119161, issue 12 (2021), doi:10.1016/j.energy.2020.119161
| The feasibility and advantages of synchrotron imaging have been demonstrated to effectively characterise fracture initiation and propagation in shales during indentation tests. These include 1) fast (minute scale) and high resolution (m scale) imaging of fracture initiation, 2) concurrent spatial and temporal information (4D) about fracture development, 3) quantification and modelling of shale def...
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| [29] | | Agent-based simulation of hindering effect of small group behavior on elevated interval evacuation time along urban rail transit, Zihua Pan, Qingchao Wei, Huan Wang, Travel Behaviour and Society, Vol. 22, issue 2, pp. 262-273 (2021), doi:10.1016/j.tbs.2020.10.007
| Passenger evacuation on elevated rail lines has always been a challenge for rail transit safety operation and evacuation planning. Though the importance of passenger behavior to evacuation has been recognized gradually, limited research focused on the influence of small group behavior on evacuation of elevated rail transit system. This paper conducted a questionnaire survey about passenger willing...
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| [30] | | Cyclic and creep combination effects on the long-term undrained behavior of overconsolidated clay, Jian Han, Zhen Yu Yin, Christophe Dano, Pierre Yves Hicher, Acta Geotechnica, Vol. 16, issue 4, pp. 1027-1041 (2021), doi:10.1007/s11440-020-01078-5
| Soft soil subjected to cyclic loading typically exhibits an increase in excess pore pressure under undrained condition which brings the soil to an overconsolidated state. Then, under a subsequent large number of cycles (e.g. more than one million) which also takes time, the creep at overconsolidated state influences the cyclic effect and thus results in a complicated long term undrained behavior. ...
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| [31] | | Effect of roughness of mussels on cylinder forces from a realistic shape modelling, Antoine Marty, Franck Schoefs, Thomas Soulard, Christian Berhault, Jean Valery Facq, Benoit Gaurier, Gregory Germain, Journal of Marine Science and Engineering, Vol. 9, number 598, issue 6 (2021), doi:10.3390/jmse9060598
| After a few weeks, underwater components of offshore structures are colonized by marine species and after few years this marine growth can be significant. It has been shown that it affects the hydrodynamic loading of cylinder components such as legs and braces for jackets, risers and mooring lines for floating units. Over a decade, the development of Floating Offshore Wind Turbines highlighted spe...
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| [32] | | A multiaxis tool path generation approach for thin wall structures made with waam, Matthieu Rauch, Jean Yves Hascoet, Vincent Querard, Journal of Manufacturing and Materials Processing, Vol. 5, number 128, issue 4 (2021), doi:10.3390/jmmp5040128
| Wire Arc Additive Manufacturing (WAAM) has emerged over the last decade and is dedicated to the realization of high dimensional parts in various metallic materials. The usual process implementation consists in associating a high performance welding generator as heat source, a NC controlled 6 or 8 degrees (for example) of freedom robotic arm as motion system and welding wire as feedstock. WAAM tool...
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| [33] | | Polydopamine coated Si nanoparticles allow for improved mechanical and electrochemical stability, Utkarsh Ahuja, Bo Wang, Pu Hu, Julien Rethore, Katerina E. Aifantis, Electrochimica Acta, Vol. 392, number 138993, issue 27 (2021), doi:10.1016/j.electacta.2021.138993
| Numerous experiments suggest that the capacity decay of Silicon (Si) porous electrodes is related to the significant fracture experienced during the lithiation/de lithiation process. In this work, modeling and surface engineering of nanosized Si is employed to synthesize nanocomposites with enhanced mechanical and electrochemical stability. Initially, a multiphysics model is applied to predict the...
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| [34] | | On the determination of acoustic emission wave propagation velocity in composite sandwich structures, Yuan Wu, Marianne Perrin, Marie Laetitia Pastor, Pascal Casari, Xiaojing Gong, Composite Structures, Vol. 259, number 113231, issue 9 (2021), doi:10.1016/j.compstruct.2020.113231
| This work focuses on the rapid determination of Acoustic Emission (AE) wave propagation velocity in composite laminate and sandwich structures using a closed form formula. Firstly, a classical closed form model proposed in the literature is extended to determine the acoustic wave velocity in any direction in a composite laminate or sandwich structure; then a corrective factor has been defined to i...
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| [35] | | Open-source carbon footprint estimator: Development and university declination, Clement Auger, Benoit Hilloulin, Benjamin Boisserie, Mael Thomas, Quentin Guignard, Emmanuel Roziere, Sustainability Switzerland, Vol. 13, number 4315, issue 8 (2021), doi:10.3390/su13084315
| Anthropogenic greenhouse gas emissions need to be cut to limit climate change. Thus, universities, in the same way as citizens and companies, are starting to raise awareness about this issue and to take action to reduce their carbon footprint. Centrale Nantes, a French Grande ecole, initiated a low carbon transition with the calculation of the 2018 carbon footprint of the university. This report p...
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| [36] | | Reactivity effect of calcium carbonate on the formation of carboaluminate phases in ground granulated blast furnace slag blended cements, Walid Deboucha, Nassim Sebaibi, Yassine El Mendili, Aurelie Fabien, U. Johnson Alengaram, Nordine Leklou, Mahmoud N. Hamdadou, Alexandra Bourdot, Stephanie Gascoin, Sustainability Switzerland, Vol. 13, number 6504, issue 11 (2021), doi:10.3390/su13116504
| The reactivity effect of calcium carbonate, present in ground oyster shells and limestone filler, on the formation of carboaluminate phases in ground granulated blast furnace slag blended cement pastes was reported in this paper. Six different binary and ternary blended cement pastes were prepared using ground granulated blast furnace slag, ground oyster shells and limestone filler with different ...
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| [37] | | Novel control model of Contact-Tip-to-Work Distance (CTWD) for sound monitoring of arc-based DED processes based on spectral analysis, Alexia Chabot, Matthieu Rauch, Jean Yves Hascoet, International Journal of Advanced Manufacturing Technology, Vol. 116, issue 11-12, pp. 3463-3472 (2021), doi:10.1007/s00170-021-07621-2
| Additive manufacturing (AM) is a rising technology bringing new opportunities for design and cost of manufacturing, compared to standard processes like casting and machining. Among the AM techniques, Direct Energy Deposition (DED) processes are dedicated to manufacture functional metallic parts. For all DED technologies, the Contact Tip to Work Distance (CTWD)namely the work distance between the d...
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| [38] | | Non-negative moment fitting quadrature rules for fictitious domain methods, Gregory Legrain, Computers and Mathematics with Applications, Vol. 99, issue 1, pp. 270-291 (2021), doi:10.1016/j.camwa.2021.07.019
| Fictitious domain methods enable to solve physical problems on unfitted grids, thereby avoiding time consuming and error prone meshing phases. However, an accurate integration of the weak formulation is still mandatory, leading to the need for efficient quadrature strategies in the elements that are partially located in the physical domain. Various methodologies have been proposed to this end. Amo...
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| [39] | | Design of concrete : Setting a new basis for improving both durability and environmental performance, Anne Ventura, Van Loc Ta, Tristan Senga Kiesse, Stephanie Bonnet, Journal of Industrial Ecology, Vol. 25, issue 1, pp. 233-247 (2021), doi:10.1111/jiec.13059
| CO2 emissions from cement production currently represent around 6% of global CO2 emissions. However, cement concrete absorbs CO2 from the atmosphere because of carbonation (i.e., penetration of atmospheric CO2 inside bulk concrete). Carbonation has beneficial effects on the mechanical resistance of cement concrete. However, carbonation also has adverse e...
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| [40] | | Enhanced impact-resistance of aeronautical quasi-isotropic composite plates through diffused water molecules in epoxy, Furqan Ahmad, Fethi Abbassi, Mazhar Ul-Islam, Frederic Jacquemin, Jung Wuk Hong, Scientific Reports, Vol. 11, number 7440, issue 1 (2021), doi:10.1038/s41598-021-81443-w
| In order to elucidate the hygroscopic effects on impact resistance of carbon fiber/epoxy quasi isotropic composite plates, low velocity impact tests are conducted on dry and hygroscopically conditioned plates, respectively, under identical configurations. For the impact tests, plates were immersed in the hot water at 80 °C to absorb a different amount of moisture content (MC). Experimental results...
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| [41] | | Probing magnetic pulse welding of aluminium and steel sheets, Rishabh Shotri, Guillaume Racineux, Amitava De, Journal of Manufacturing Processes, Vol. 72, issue 2, pp. 309-319 (2021), doi:10.1016/j.jmapro.2021.10.029
| Magnetic pulse welding is used to join overlapped thin sheets of dissimilar materials in solid state, which is not easy by fusion welding due to severe thermomechanical distortion and the formation of brittle intermetallic compounds. An intense electromagnetic pulse is employed that causes an impact between the overlapped parts leading to plastic deformation and rapid coalescence along the interfa...
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| [42] | | Vacuum-Bag-Only (VBO) Molding of Flax Fiber-reinforced Thermoplastic Composites for Naval Shipyards, V. Popineau, A. Celino, M. Le Gall, L. Martineau, C. Baley, A. Le Duigou, Applied Composite Materials, Vol. 28, issue 3, pp. 791-808 (2021), doi:10.1007/s10443-021-09890-2
| This article presents an alternative manufacturing process for unidirectional tape natural fiber Polypropylene with Maleic Anhydride grafted PolyPropylene (PP + MAPP) thermoplastic composites that could enable large high performance parts to be built, while being recyclable at end of life. The performance target is flax/epoxy composites that are currently manufactured in shipyard. A parametric ana...
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| [43] | | Effect of salt spray ageing on the fracture of composite-to-metal bonded joints, M. M. Arouche, M. N. Saleh, S. Teixeira de Freitas, S. de Barros, International Journal of Adhesion and Adhesives, Vol. 108, number 102885, issue 5 (2021), doi:10.1016/j.ijadhadh.2021.102885
| This work investigates the effect of long term environmental exposure on the performance of composite to metal bonded joints. Specimens are manufactured using a carbon fiber reinforced polymer (CFRP) co bonded to a steel member with epoxy adhesive and aged in a salt spray chamber. The mixed mode fracture behavior of the non aged and aged specimens is assessed using the mixed mode bending (MMB) tes...
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| [44] | | Construction of physical welding windows for magnetic pulse welding of 5754 aluminum with DC04 steel, C. Khalil, S. Marya, G. Racineux, International Journal of Material Forming, Vol. 14, issue 5, pp. 843-854 (2021), doi:10.1007/s12289-020-01597-2
| Magnetic pulse welding (MPW) has potential applications where fusion welding is problematic, such as in dissimilar joints or where the very part integrity, as in electronic components, is likely to be impaired by hot environments. Mostly suited in lap configuration, its successful implementation hinges on multiple process parameters such as standoff distance between two parts, the discharge energy...
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| [45] | | A new Delaunay triangulation-based approach to characterize the pore network in granular materials, Ngoc Son Nguyen, Habib Taha, Didier Marot, Acta Geotechnica, Vol. 16, issue 7, pp. 2111-2129 (2021), doi:10.1007/s11440-021-01157-1
| The ability of granular materials to retain fine particles transported within their void space by seepage flow depends strongly on the geometric characteristics of their pore network (pore sizes and constriction sizes). Hence, characterizing the pore network of a granular assembly obtained by means of a micro tomography scanning or a numerical discrete simulation is of great importance in assessme...
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| [46] | | On the influence of glass fiber mat on the mixed-mode fracture of composite-to-metal bonded joints, Marcio Moreira Arouche, Sofia Teixeira de Freitas, Silvio de Barros, Composite Structures, Vol. 256, number 113109, issue 3 (2021), doi:10.1016/j.compstruct.2020.113109
| In this work, the influence of a layer of glass fiber mat (GFM) inserted in a bi material bonded joint interface is investigated as a toughening mechanism to improve the fracture performance of bonded structures. Composite to metal bonded specimens were manufactured by hand lay up using two different consolidation processes: at room pressure or using vacuum bagging. The fracture behavior was evalu...
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| [47] | | Plant Extraction and Physicochemical Characterizations of Untreated and Pretreated Diss Fibers (Ampelodesmos mauritanicus), Mustapha Nouri, Ismail Griballah, Mahfoud Tahlaiti, Frederic Grondin, Johnny Beaugrand, Journal of Natural Fibers, Vol. 18, issue 8, pp. 1083-1093 (2021), doi:10.1080/15440478.2019.1687062
| The Ampelodesmos mauritanicus plant, Mauritanian grass or also called Diss, is a perennial abundant plant on the Mediterranean contour, having attractive characteristics for ecofriendly materials. This work aims to highlight the potential of the Diss fibers elements by assessing their use as reinforcement for polymer matrices (bio composite). So, untreated and treated Diss fibers by chemical (soda...
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| [48] | | Scaling Laws for Rigid-Body Response of Masonry Structures under Blast Loads, Filippo Masi, Ioannis Stefanou, Victor Maffi-Berthier, Journal of Engineering Mechanics, Vol. 147, number 73, issue 10 (2021), doi:10.1061/(ASCE)EM.1943-7889.0001986
| The response of masonry structures to explosions cannot be exclusively investigated relying only on numerical and analytical tools. Experimental tests are of paramount importance for improving current understanding and validating existing models. However, experiments involving blast scenarios are, at present, partial and limited in number compared to tests under different dynamic conditions, such ...
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| [49] | | Interface direct shear tests on jez-1 mars regolith simulant, Kexin Yin, Jiangxin Liu, Jiaxing Lin, Andreea Roxana Vasilescu, Khaoula Othmani, Eugenia Di Filippo, Applied Sciences Switzerland, Vol. 11, number 7052, issue 15 (2021), doi:10.3390/app11157052
| The mechanical behaviors of Martian regolith structure interfaces are of great significance for the design of rover, development of excavation tools, and construction of infrastructure in Mars exploration. This paper presents an experimental investigation on the properties of a Martian regolith simulant (JEZ 1) through one dimensional oedometer test, direct shear test, and interface direct shear t...
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| [50] | | Chemical shrinkage of low water to cement (W/c) ratio cem i and cem iii cement pastes incorporating silica fume and filler, Judy Kheir, Benoit Hilloulin, Ahmed Loukili, Nele De Belie, Materials, Vol. 14, number 1164, issue 5 (2021), doi:10.3390/ma14051164
| Chemical shrinkage (CS) is the reason behind early age cracking, a common problem for concrete with low water to cement ratios (w/c < 0.35) known as Ultra High and High Performance Concrete (U HPC). However, to avoid the crack development initiated by autoge nous shrinkage, a precise measurement of CS is required, as the values obtained can determine the correct amount of internal curing agent to ...
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| [51] | | Capturing the stress evolution in electrode materials that undergo phase transformations during electrochemical cycling, Bo Wang, Julien Rethore, Katerina E. Aifantis, International Journal of Solids and Structures, Vol. 224, number 111032 (2021), doi:10.1016/j.ijsolstr.2021.03.019
| The present work sheds light on the stresses generated in a spherical particle subjected to phase transformations during ion insertion. In order to account for the physical process that occurs during electrochemical cycling, the models used are those of small deformation and account for the effects of phase transformation, chemo mechanical coupling and concentration dependent material properties. ...
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| [52] | | Assessment of the effect of fiber percentage in glass fiber reinforced slag-based geopolymer, Lais Alves, Nordine Leklou, Fabio de Souza, Silvio De Barros, Journal of Asian Ceramic Societies, Vol. 9, issue 3, pp. 1265-1274 (2021), doi:10.1080/21870764.2021.1966977
| Fibers can increase the ductility of geopolymer materials, acting as reinforcements to improve mechanical properties. These improvements depend on fiber content and quantity. This study evaluates the impacts of different percentages of glass fiber on a GBFS (ground blast furnace slag) geopolymer matrix. The glass fibers were used on the critical length of 20 mm, obtained by pull out test in previo...
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| [53] | | Numerical and experimental study of a multimode optical fiber sensor based on Fresnel reflection at the fiber tip for refractive index measurement, Antoine Brientin, Dominique Leduc, Virginie Gaillard, Marion Girard, Cyril Lupi, Optics and Laser Technology, Vol. 143, number 107315, issue 3 (2021), doi:10.1016/j.optlastec.2021.107315
| This paper presents the numerical and experimental study of a multimode optical fiber (MMF) sensor based on Fresnel reflection at the fiber tip. Considering different modal power distributions (uniform mode distribution, gaussian and equilibrium mode distribution), the effective fraction of the incident light reflected at the interface between the end of the fiber and the surrounding medium is fir...
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| [54] | | An entropy-stable Smooth Particle Hydrodynamics algorithm for large strain thermo-elasticity, Ataollah Ghavamian, Chun Hean Lee, Antonio J. Gil, Javier Bonet, Thomas Heuze, Laurent Stainier, Computer Methods in Applied Mechanics and Engineering, Vol. 379, number 113736, issue 1 (2021), doi:10.1016/j.cma.2021.113736
| This paper presents a novel Smooth Particle Hydrodynamics computational framework for the simulation of large strain fast solid dynamics in thermo elasticity. The formulation is based on the Total Lagrangian description of a system of first order conservation laws written in terms of the linear momentum, the triplet of deformation measures (also known as minors of the deformation gradient tensor) ...
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| [55] | | Experimental Investigation of Allotropic Transformation of Cobalt: Influence of Temperature Cycle, Mechanical Loading and Starting Microstructure, Nadjib Iskounen, Pierre Antoine Dubos, Jamal Fajoui, Michel Coret, Marie Jose Moya, Baptiste Girault, Nicolas Barrier, Nicolas Bruzy, Eric Hug, David Gloaguen, Metallurgical and Materials Transactions A Physical Metallurgy and Materials Science, Vol. 52, issue 4, pp. 1477-1491 (2021), doi:10.1007/s11661-021-06142-7
| Abstract: The allotropic phase transformation in polycrystalline high purity cobalt is incompletely reversible and exhibits a temperature hysteresis. This leads to the presence of a FCC metastable phase at room temperature, which alters the mechanical properties. Moreover, this phase transformation seems to be induced by the plastic deformation. The influence of thermal cycling and initial microst...
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| [56] | | Unified phase field model to simulate both intergranular and transgranular failure in polycrystalline aggregates, Soukaina Riad, Didier Bardel, Julien Rethore, Finite Elements in Analysis and Design, Vol. 194, number 103555 (2021), doi:10.1016/j.finel.2021.103555
| In this work we develop a new phase field method for modeling fracture in polycrystalline materials. Many studies addressed this problem by combining cohesive models at the grain boundaries and damage models for the bulk. In this paper, a unified formulation is proposed in the phase field framework. Anisotropic failure is considered within the grain. Each of the preferential failure direction is a...
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| [57] | | Data-driven reduced homogenization for transient diffusion problems with emergent history effects, Abdullah Waseem, Thomas Heuze, Marc G.D. Geers, Varvara G. Kouznetsova, Laurent Stainier, Computer Methods in Applied Mechanics and Engineering, Vol. 380, number 113773, issue 9 (2021), doi:10.1016/j.cma.2021.113773
| In this paper, we propose a data driven reduced homogenization technique to capture diffusional phenomena in heterogeneous materials which reveal, on a macroscopic level, a history dependent non Fickian behavior. The adopted enriched continuum formulation, in which the macroscopic history dependent transient effects are due to the underlying heterogeneous microstructure is represented by enrichmen...
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| [58] | | Statistical soil characterization of an underground corroded pipeline using in-line inspections, Rafael Amaya-Gomez, Emilio Bastidas-Arteaga, Felipe Munoz, Mauricio Sanchez-Silva, Metals, Vol. 11, number 292, issue 2 (2021), doi:10.3390/met11020292
| Underground pipelines have a space dependent condition that arises from various soil properties surrounding the pipeline (e.g., moisture content, pH, aeration) and the efficiency of protec tion measures. Corrosion is one of the main threats for pipelines and is commonly monitored with in line inspections (ILI) every 2 to 6 years. Preliminary characterizations of the surrounding soil allow pipeline...
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| [59] |  | Lipschitz regularization for softening material models: The Lip-field approach, Nicolas Moes, Nicolas Chevaugeon, Comptes Rendus Mecanique, Vol. 349, issue 2, pp. 415-434 (2021), doi:10.5802/CRMECA.91
| Softening material models are known to trigger spurious localizations. This may be shown theoretically by the existence of solutions with zero dissipation when localization occurs and numerically with spurious mesh dependency and localization in a single layer of elements. We introduce in this paper a new way to avoid spurious localization. The idea is to enforce a Lipschitz regularity on the inte...
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| [60] | | Fractal dimension as an effective feature for characterizing hard marine growth roughness from underwater image processing in controlled and uncontrolled image environments, Franck Schoefs, Michael Obyrne, Vikram Pakrashi, Bidisha Ghosh, Mestapha Oumouni, Thomas Soulard, Marine Reynaud, Journal of Marine Science and Engineering, Vol. 9, number 1344, issue 12 (2021), doi:10.3390/jmse9121344
| Hard marine growth is an important process that affects the design and maintenance of floating offshore wind turbines. A key parameter of hard biofouling is roughness since it considerably changes the level of drag forces. Assessment of roughness from on site inspection is required to improve updating of hydrodynamic forces. Image processing is rapidly developing as a cost effective and easy to im...
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| [61] | | Analysis of volumetric internal erosion in cohesionless soils: Model, experiments and simulations, Rachel Gelet, Alaa Kodieh, Didier Marot, Ngoc Son Nguyen, International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 45, issue 18, pp. 2780-2806 (2021), doi:10.1002/nag.3286
| A hydro mechanical continuous model that accounts for volumetric internal erosion (otherwise called suffusion) is developed based on experimental observations and data to fill the gap between laboratory testing and field applications. The model is proposed based on the mixture theory applied to a two phase four species porous medium. The erodible soil is partitioned in two phases: one solid phase ...
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| [62] | | A procedure to prepare sandclay mixture samples for soilstructure interface direct shear tests, Kexin Yin, Jiangxin Liu, Andreea Roxana Vasilescu, Eugenia Di Filippo, Khaoula Othmani, Applied Sciences Switzerland, Vol. 11, number 5337, issue 12 (2021), doi:10.3390/app11125337
| A large number of experimental studies on sandclay mixtures are well documented in the literature; however, the preparation protocol is rarely clearly detailed or varies a lot according to the authors. Variations in the preparation technique obviously increases the challenge of comparing different test results. As a consequence, sample preparation for sandclay mixtures should be kept as constant a...
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| [63] | | Multiscale analysis of brittle failure in heterogeneous materials, Elie Eid, Rian Seghir, Julien Rethore, Journal of the Mechanics and Physics of Solids, Vol. 146, number 104204, issue 8 (2021), doi:10.1016/j.jmps.2020.104204
| This paper presents a versatile model free approach for linking the damage in highly heterogeneous materials at multiple scales. The proposed scheme evolves from phase field modelling at the microscopic scale to simulate brittle failure, towards the estimation of the effective elastic, toughness and strength properties of the material at the mesoscopic scale, via a model free coarse graining techn...
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| [64] | | Size effects in cobalt plastically strained in tension: Impact on gliding and twinning work hardening mechanisms, Eric Hug, Clement Keller, Pierre Antoine Dubos, Mayerling Martinez Celis, Journal of Materials Research and Technology, Vol. 11, issue 16, pp. 1362-1377 (2021), doi:10.1016/j.jmrt.2021.01.105
| Mechanical properties in tension of cobalt have been studied in a wide range of grain size d using thickness t of samples from 125 to 700 m. The Hall and Petch (HP) relationship indicates that the yield stress strongly varies for t/d below a critical value around 14, highlighting the existence of a multicrystalline regime. The behavior becomes almost single crystalline when t/d is lower than 2.5, ...
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| [65] | | Effect of strain rate on the adhesive bond shearing resistance of stiff clay, Jian Han, Zhen Yu Yin, Christophe Dano, Pierre Yves Hicher, Transportation Geotechnics, Vol. 27, number 100479, issue 1 (2021), doi:10.1016/j.trgeo.2020.100479
| Up to now, the effect of strain rate on the adhesive bond shearing resistance of stiff clay, which plays a fundamental role in constitutive modeling of such kind of soils, remains unclear. This paper aims to experimentally investigate the strain rate dependency of the adhesive bond shearing resistance of stiff clay. Both undisturbed and reconstituted overconsolidated samples of Merville stiff clay...
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| [66] | | Towards common specifications for low- and high-expansion cement-based materials exposed to external sulphate attacks, Sonia Boudache, Emmanuel Roziere, Ahmed Loukili, Laurent Izoret, Construction and Building Materials, Vol. 294, number 123586, issue 4 (2021), doi:10.1016/j.conbuildmat.2021.123586
| External sulphate attack involves the penetration of sulphate ions in solution within a cementitious material. The equilibrium conditions are changed, and the ions released by hydration products can react with the sulphate ions and form new compounds. Depending on exposure conditions and cement compositions, expansive minerals, such as ettringite, can precipitate and cause cracking and, eventually...
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| [67] | | On the use of embedded fiber optic sensors for measuring earlyage strains in concrete, K. K.Santos Silva, F. A.N. Silva, T. Mahfoud, A. Khelidj, A. Brientin, A. C. Azevedo, J. M.P.Q. Delgado, A. G.Barbosa de Lima, Sensors, Vol. 21, number 4171, issue 12 (2021), doi:10.3390/s21124171
| Detailed information about concrete behavior in real structures is an important issue in controlling its performance during its service life, and the use of embedded sensors to obtain desired information such as temperature, onset of the cracking process and evolution of strains, has gained the attention of the building concrete industry. Data obtained using this technology can provide valuable in...
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| [68] | | Deterministic modeling of solidification microstructure formation in directed energy deposition fabricated Ti6Al4V, Jinghao Li, Xianglin Zhou, Qingbo Meng, Mathieu Brochu, Nejib Chekir, J. J. Sixsmith, J. Y. Hascoet, Yaoyao Fiona Zhao, Additive Manufacturing, Vol. 46, number 102182, issue 7 (2021), doi:10.1016/j.addma.2021.102182
| Metal additive manufacturing (MAM) technology is now widely applied in the manufacturing and remanufacturing industry, among which microstructure simulation gradually shows its importance. Traditional solidification microstructure simulation methods all have their merits as well as drawbacks when applied in MAM cases. In this work, a deterministic solidification microstructure model, named invasio...
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| [69] | | Numerical modeling of soilpipe interaction of single pipeline at shallow embedment in clay by hypoplastic macroelement, Zhuang Jin, Zheng Li, Zhen yu Yin, Panagiotis Kotronis, Ocean Engineering, Vol. 241, number 110017, issue 10 (2021), doi:10.1016/j.oceaneng.2021.110017
| Nowadays, the numerical analysis of submarine pipelines of offshore oil and gas industry is a big challenge in engineering design. A simple, fast and accurate numerical tool is proposed in this article based on the macroelement concept. The novel macroelement is within the framework of hypoplasticity and can consider static monotonic combined (multi directional) loads for shallow embedded pipeline...
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| [70] | | A multistage stochastic program for the design and management of flexible infrastructure networks, Samuel Torres-Rincon, Mauricio Sanchez-Silva, Emilio Bastidas-Arteaga, Reliability Engineering and System Safety, Vol. 210, number 107549, issue 3 (2021), doi:10.1016/j.ress.2021.107549
| Throughout their lifetime, infrastructure network systems face unplanned events that impose pressures on their integrity, functionality, and ability to deliver value. Most of the existing infrastructure is designed to deal with the challenges imposed by uncertain external phenomena. Authors from different backgrounds have identified flexibility, changeability, and adaptability as key attributes th...
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| [71] | | Investigation of the nonlinear slamming-induced whipping response of ships using a fully-coupled hydroelastoplastic method, George Jagite, Quentin Derbanne, Sime Malenica, Fabien Bigot, Herve Le Sourne, Patrice Cartraud, Ocean Engineering, Vol. 238, number 109751, issue 34 (2021), doi:10.1016/j.oceaneng.2021.109751
| Slamming induced whipping is traditionally computed as the response of a linear elastic structural model. However, in order to investigate the consequence of whipping on the hull girder's collapse, the hydro structure interaction must be performed in a fully coupled approach where the nonlinearities of both domains are considered. Therefore, this paper presents a new approach developed for solving...
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| [72] | | Improvement of mechanical properties of hydroxyapatite composites reinforced with i-Al64Cu23Fe13 quasicrystal, Jose Castaneda-Via, Carlos V. Landauro, Justiniano Quispe-Marcatoma, Ana Champi, Fred Montalvo, Leyla Delgado, Lidia Yileng Tay, Marie Jose Moya, Ronald Guillen, Francisco Rumiche, Victor Pena-Rodriguez, Journal of Composite Materials, Vol. 55, issue 9, pp. 1209-1216 (2021), doi:10.1177/0021998320964553
| Mechanical behavior of hydroxyapatite based composites (HAp) was studied as a function of the reinforcement concentration of the quasicrystalline (QC) Al64Cu23Fe13 alloy. The synthesis of the HAp matrix was carried out by sol gel method, while the synthesis of the QC was performed by an arc furnace with a subsequent thermal treatment. The composites were made by po...
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| [73] | | Investigation of residual stresses in planar dissimilar magnetic pulse welds by neutron diffraction, M. N. Avettand-Fenoel, T. Sapanathan, T. Pirling, G. Racineux, A. Simar, J. M. Drezet, Journal of Manufacturing Processes, Vol. 68, issue 2, pp. 1758-1766 (2021), doi:10.1016/j.jmapro.2021.06.071
| Residual stresses are investigated for the first time in a dissimilar AA1050DP450 steel magnetic pulse weld using neutron diffraction. Close to the joint interface, tensile residual stresses are observed in the Al sheet and compressive residual stresses are identified in the steel sheet. At the interface, longitudinal tensile stresses are dominant on the aluminum side and transverse and normal str...
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| [74] | | Estimating normal effective stress degradation in sand under undrained simple shear condition, Ze Xiang Wu, Christophe Dano, Pierre Yves Hicher, Zhen Yu Yin, European Journal of Environmental and Civil Engineering, Vol. 25, issue 1, pp. 170-189 (2021), doi:10.1080/19648189.2018.1521750
| The degradation of the effective normal stress in soil surrounding the pile caused by undrained cyclic loading affects the shaft capacity of the pile and can lead to structural instability. In order to investigate this phenomenon, a series of constant volume monotonic and cyclic simple shear tests on Fontainebleau sand has been conducted. Based on the experimental results, the shear stress at phas...
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| [75] | | From dislocation nucleation to dislocation multiplication in ceramic nanoparticle, Inas Issa, Lucile Joly-Pottuz, Jonathan Amodeo, David J. Dunstan, Claude Esnouf, Julien Rethore, Vincent Garnier, Jerome Chevalier, Karine Masenelli-Varlot, Materials Research Letters, Vol. 9, issue 6, pp. 278-283 (2021), doi:10.1080/21663831.2021.1894253
| Magnesium oxide nanocubes are compressed along the [001] direction in situ in the transmission electron microscope. Incipient plasticity in the smaller samples is characterized by the nucleation of few (Formula presented.) dislocations while a larger number of line defects is observed in larger nanocubes. Yield and flow stresses scattered stochastically above a minimum value varying as the inverse...
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| [76] | | Investigation of microstructural and mechanical properties of partially hydrated Asbestos-Free fiber cement waste (AFFC) based concretes: Experimental study and predictive modeling, Harifidy Ranaivomanana, Nordine Leklou, Construction and Building Materials, Vol. 277, number 121943, issue 2 (2021), doi:10.1016/j.conbuildmat.2020.121943
| Asbestos Free Fiber Cement waste (AFFC) was tested in this study as supplementary cementitious materials (SCM) in concrete formulations. The incorporation of AFFC leads to a drop in total porosity, compressive strength and Young modulus due to the creation of capillary voids. The optimum dosage of AFFC is 10%. Below this value, the created capillary voids are not interconnected enough to form perc...
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| [77] | | Reactivity of Recycled Aggregates Used for Pavement Base: From Field to Laboratory, Jean David Lau Hiu Hoong, Yunlu Hou, Philippe Turcry, Pierre Yves Mahieux, Hakim Hamdoun, Ouali Amiri, Jerome Lux, Abdelkarim Ait-Mokhtar, Journal of Materials in Civil Engineering, Vol. 33, number 85, issue 6 (2021), doi:10.1061/(ASCE)MT.1943-5533.0003661
| The aim of this study is to investigate the cause of the self cementing properties of recycled aggregates used for pavement base. Clay bricks were added to the recycled aggregates to study the pozzolanic reactions. The evolution of the mechanical performances of the materials was investigated in the laboratory (California Bearing Ratio) and in the field (plate test). Both tests showed that initial...
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| [78] | | Lattice strain development in an alpha titanium alloy studied using synchrotron and neutron diffraction, Kodjo Emmanuel Agbovi, Baptiste Girault, Jamal Fajoui, Saurabh Kabra, Winfried Kockelmann, Thomas Buslaps, Agnieszka Poulain, David Gloaguen, Materials Science and Engineering A, Vol. 819, number 141489 (2021), doi:10.1016/j.msea.2021.141489
| Neutron and high energy X ray diffraction methods have been used to investigate deformation mechanisms (slip and twinning activities) during uniaxial tensile tests of Grade 1 commercially pure titanium (Ti ). These two diffraction techniques have provided valuable and complementary information. The predictions made by an Elasto Plastic Self Consistent (EPSC) model, taking into account grain reorie...
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| [79] | | Fiber-matrix bond strength by pull-out tests on slag-based geopolymer with embedded glass and carbon fibers, Lais Alves, Nordine Leklou, Pascal Casari, Silvio de Barros, Journal of Adhesion Science and Technology, Vol. 35, issue 18, pp. 2035-2045 (2021), doi:10.1080/01694243.2020.1870322
| The reinforcement efficiency on a composite depends on the effective transfer of the stress between matrix and fiber. This work presents an experimental and comparative study of fiber matrix bond strength for fiber matrix interface between glass fibers and carbon fibers added to the slag based geopolymer matrix. This analysis was performed by pull out test. A total of 18 tests have been conducted,...
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| [80] | | Reduced order modeling of selective laser melting: from calibration to parametric part distortion, Chady Ghnatios, Khalil El Rai, Nicolas Hascoet, Pierre Adrien Pires, Jean Louis Duval, Jon Lambarri, Jean Yves Hascoet, Francisco Chinesta, International Journal of Material Forming, Vol. 14, issue 5, pp. 973-986 (2021), doi:10.1007/s12289-021-01613-z
| Additive manufacturing is an appealing solution to produce geometrically complex parts, difficult to manufacture using traditional technologies. The extreme process conditions, in particular the high temperature, complex interactions and couplings, and rich metallurgical transformations that this process entails, are at the origin of numerous process defects. Therefore, the numerical simulation of...
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| [81] | | The Influence of Mixing Orders on the Microstructure of Artificially Prepared Sand-Clay Mixtures, Kexin Yin, Anne Laure Fauchille, Eugenia Di Filippo, Khaoula Othmani, Samuel Branchu, Giulio Sciarra, Panagiotis Kotronis, Advances in Materials Science and Engineering, Vol. 2021, issue 1, pp. 1-15 (2021), doi:10.1155/2021/8552224
| The mixing order of silica sand, clay (kaolinite), and water controls the microstructure of resulting artificial soil samples. Most homogeneous microstructures can be achieved by applying the mixing order "sand water clay."The following methods were used to validate this statement: (1) optical observation, (2) X ray tomography, (3) scanning electron microscopy, and (4) Mercury intrusion porosimetr...
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| [82] | | Rapid assessment of ship raking grounding on elliptic paraboloid shaped rock, J. P. Pineau, H. Le Sourne, Z. Soulhi, Ships and Offshore Structures, Vol. 16, issue sup1, pp. 106-121 (2021), doi:10.1080/17445302.2021.1927357
| The proposed paper presents a simplified analytical method for predicting the resistance of ship bottom structure subjected to grounding over a sharp rock idealised as an elliptic paraboloid. During grounding, sharp rock may lead to earlier penetration and serious consequences, such as compartment flooding, oil leakage. Therefore, it is of great importance to assess the response of a ships bottom ...
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| [83] | | Probabilistic and sensitivity analysis of analytical models of corrosion onset for reinforced concrete structures, Ndrianary Rakotovao Ravahatra, Emilio Bastidas-Arteaga, Franck Schoefs, Thomas de Larrard, Frederic Duprat, European Journal of Environmental and Civil Engineering, Vol. 25, issue 9, pp. 1665-1694 (2021), doi:10.1080/19648189.2019.1591307
| Chloride ingress and carbonation are the main factors leading to corrosion initiation of reinforced concrete structures. Lifetime assessment and maintenance optimisation of these deteriorating structures has been based for several practical applications on analytical predictive models. The literature review shows that there are numerous analytical models of chloride ingress and carbonation. It was...
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| [84] | | A flexibility-based approach for the design and management of floating offshore wind farms, Samuel Torres-Rincon, Emilio Bastidas-Arteaga, Mauricio Sanchez-Silva, Renewable Energy, Vol. 175, issue 2, pp. 910-925 (2021), doi:10.1016/j.renene.2021.04.121
| Floating offshore wind farms have become a gateway to reach locations that are technically and economically infeasible to exploit using fixed platforms. However, the high capital investments and the uncertainty associated with the reliability, capacity factor, technology evolution, electricity demand, and regulatory frameworks negatively affect the cost of energy of this approach. Alternative stra...
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| [85] | | A Perturbed Markovian process with state-dependent increments and measurement uncertainty in degradation modeling, M. Oumouni, F. Schoefs, Computer Aided Civil and Infrastructure Engineering, Vol. 36, issue 8, pp. 978-995 (2021), doi:10.1111/mice.12644
| In structural reliability, the Markovian cumulative damage approaches such as Gamma process seem promising to model a nonreversible deterioration that involves gradually over time with small time increments. However, in many degradation phenomena, its evolution depends on the level of the degradation rather than the increments of time. Further, the measured data are usually collected with random e...
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| [86] | | Two-scale analysis of transient diffusion problems through a homogenized enriched continuum, A. Waseem, T. Heuze, L. Stainier, M. G.D. Geers, V. G. Kouznetsova, European Journal of Mechanics A Solids, Vol. 87, number 104212, issue 5 (2021), doi:10.1016/j.euromechsol.2021.104212
| This paper addresses the two scale problem underlying the enriched continuum for transient diffusion problems, which was previously developed and tested at the single scale level only (Waseem et al., Comp.Mech, 65, 2020). For a linear material model exhibiting a relaxed separation of scales, a model reduction was proposed at the micro scale that replaces the micro scale problem with a set of uncou...
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| [87] | | Metrological assessment of multi-sensor camera technology for spatially-resolved ultra-high-speed imaging of transient high strain-rate deformation processes, Adrien Vinel, Rian Seghir, Julien Berthe, Gerald Portemont, Julien Rethore, Strain, Vol. 57, issue 4 (2021), doi:10.1111/str.12381
| The present work proposes a metrological route for capturing spatially resolved ultra high speed kinematic full field data from high strain rate experiments and multi sensor camera technology. This paper focuses, from an application point of view, on highly resolved rotating mirror cameras, such as the Cordin 580. This camera allows 78 frames of 8 megapixels to be recorded at up to 4 million frame...
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| [88] | | Elastic guided waves in helical multi-wire armors, F. Treyssede, L. Laguerre, P. Cartraud, T. Soulard, Ultrasonics, Vol. 110, number 106294, issue 11 (2021), doi:10.1016/j.ultras.2020.106294
| In this paper, a numerical method is proposed to investigate the propagation of elastic guided waves in the armors protecting cylindrical structures, such as cables and pipes, and evaluate the feasibility of using these waves in the context of non destructive evaluation and structural health monitoring. Armors usually consist of a large number of helical wires in contact with polymeric sheaths sur...
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| [89] | | A novel method for additive manufacturing of complex shape curved parts by using variable height layers, Matthieu Rauch, Jorge Piedra Dorado, Jean Yves Hascoet, Guillaume Ruckert, Journal of Machine Engineering (2021), doi:10.36897/jme/138820
| The Wire Arc Additive Manufacturing process (WAAM) is designed for the manufacture of large metallic parts with no joints, very little waste material and hardly any support. It is gaining its space inside the naval, aeronautics and space industries. However, there are key challenges to be solved in order to increase the performance of the WAAM process. Parts with curved shapes are difficult to man...
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| [90] | | Spatial variability assessment of structures from adaptive NDT measurements, Mestapha Oumouni, Franck Schoefs, Structural Safety, Vol. 89, number 102052, issue 4 (2021), doi:10.1016/j.strusafe.2020.102052
| Inspection by non destructive testing (NDT) techniques is an effective way for assessing structures condition state, their pathologies and locating potential critical areas. However, establishing accurate diagnoses requires numerous measurements while available budget is limited. Nevertheless, determining the spatial variability of the material properties leads fewer of the required measurements, ...
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| [91] | | Influence of initial material properties on the degradation of mortars with low expansion cements subjected to external sulfate attack, Sonia Boudache, Ahmed Loukili, Emmanuel Roziere, Laurent Izoret, Materials and Structures Materiaux Et Constructions, Vol. 54, number 1275, issue 3 (2021), doi:10.1617/s11527-021-01709-7
| External sulphate attack consists in reactions between sulphate ions and hydration products causing crystallisation pressures then macroscopic expansion and cracking. The penetration of sulphates within the material is the rate limiting step. Thus, laboratory tests can last a few years before giving usable results. Moreover some cement based materials show relatively long latency period and low ex...
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| [92] | | Chloride ions penetration of fly ash and ground granulated blast furnace slags-based alkali-activated mortars, Patrycja Duzy, Mateusz Sitarz, Marcin Adamczyk, Marta Choinska, Izabela Hager, Materials, Vol. 14, number 6583, issue 21 (2021), doi:10.3390/ma14216583
| Due to the need to reduce the CO2 emissions of mineral binders, researchers are considering the use of alkali activated materials (AAMs) as an alternative to cementitious binders. The properties of AAMs can be more advantageous than those presented by cementitious binders, and thus they can replace Portland cement binders in some applications. Mechanical tests of AAMs are being conducte...
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| [93] | | Design of Sand-Based, 3-D-Printed Analog Faults With Controlled Frictional Properties, Philipp Braun, Georgios Tzortzopoulos, Ioannis Stefanou, Journal of Geophysical Research Solid Earth, Vol. 126, number 245, issue 5 (2021), doi:10.1029/2020JB020520
| Laboratory experiments with surrogate materials play an important role in fault mechanics. They can improve the current state of knowledge by testing various scientific hypotheses in a repeatable and controlled way. Central in these experiments is the selection of appropriate analog, rock like materials. Here, we investigated the frictional properties of sand based, 3 D printed materials. We perfo...
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| [94] | | Absorbent Porous Paper Reveals How Earthquakes Could be Mitigated, G. Tzortzopoulos, P. Braun, I. Stefanou, Geophysical Research Letters, Vol. 48, number 245, issue 3 (2021), doi:10.1029/2020GL090792
| Earthquakes nucleate when large amounts of elastic energy, stored in the earth's crust, are suddenly released due to abrupt sliding over a fault. Fluid injections can reactivate existing seismogenic faults and induce/trigger earthquakes by increasing fluid pressure. Here we develop an analogous experimental system of simultaneously loaded and wetted absorbent porous paper to quantify theoretically...
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| [95] | | Chondrogenic and BMP-4 primings confer osteogenesis potential to human cord blood mesenchymal stromal cells delivered with biphasic calcium phosphate ceramics, Meadhbh Brennan, Mario Barilani, Francesco Rusconi, Julien de Lima, Luciano Vidal, Cristiana Lavazza, Lorenza Lazzari, Rosaria Giordano, Pierre Layrolle, Scientific Reports, Vol. 11, number 143, issue 1 (2021), doi:10.1038/s41598-021-86147-9
| Bone marrow mesenchymal stem/stromal cells (BMSCs) show great promise for bone repair, however they are isolated by an invasive bone marrow harvest and their regenerative potential decreases with age. Conversely, cord blood can be collected non invasively after birth and contains MSCs (CBMSCs) that can be stored for future use. However, whether CBMSCs can replace BMSCs targeting bone repair is unk...
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| [96] | | Characterization of microcracking of NCF composites under accelerated hygrothermal cycles: Influence of the stitching yarn and the style of biaxial NCF, H. Bezzou, M. Peron, P. Casari, V. Singery, D. Ponsolle, F. Jacquemin, Composites Part A Applied Science and Manufacturing, Vol. 149, number 106507 (2021), doi:10.1016/j.compositesa.2021.106507
| In this paper, an analysis of the evolution of microcracking of Non Crimp Fabric (NCF) polymer matrix laminates under hygrothermal loading is presented. These composites are reinforced with biaxial NCF styles ([+45/ 45], [0/90], etc.) and manufactured by Liquid Resin Infusion (LRI). The samples are subjected to accelerated hygrothermal cycles that cause microcracks in specific resin rich areas (RR...
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| [97] | | Diagnosis and assessment of deep pile cap foundation of a tall building affected by internal expansion reactions, Fernando A.N. Silva, Joao M.P.Q. Delgado, Antonio C. Azevedo, Tahlaiti Mahfoud, Abdelhafid Khelidj, Nicole Nascimento, Antonio G.B. Lima, Buildings, Vol. 11, number 104, issue 3 (2021), doi:10.3390/buildings11030104
| Early deterioration of reinforced concrete foundations has been often reported in recent years. This process is usually characterized by an extensive mapping cracking process on concrete surfaces that results from several types of Internal Swelling Reaction (ISR). In this paper, a real case study of a tall reinforced concrete building with a severe deterioration process installed in its deep found...
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| [98] | | Theoretical solution for the axial vibration of functionally graded double-lap adhesive joints, Shadi A. Sindi, Ramzi Othman, Khalid H. Almitani, Mathematics and Mechanics of Solids, Vol. 26, issue 6, pp. 823-842 (2021), doi:10.1177/1081286520967709
| Adhesively bonded joints have widely been used in a number of engineering applications, owing to their improved mechanical performance as compared with other mechanical joining techniques, such as rivets or bolts. In this study, a theoretical solution of double lap joints is established, with functionally graded adhesive and isotopic adherends, under harmonic loads. Assuming a parabolic distributi...
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| [99] | | Creep and shrinkage behaviour of disintegrated and non-disintegrated cement mortar, Rihards Gailitis, Beata Figiela, Kalvis Abelkalns, Andina Sprince, Genadijs Sahmenko, Marta Choinska, Martin Duarte Guigou, Materials, Vol. 14, number 7510, issue 24 (2021), doi:10.3390/ma14247510
| One way to prevent cement from ending up in landfills after its shelf life is to regain its activity and reuse it as a binder. As has been discovered, milling by planetary ball mill is not effective. Grinding by collision is considered a more efficient way to refine brittle material and, in the case of cement, to regain its activity. There has been considerable research regarding the partial repla...
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| [100] | | Bounding the multi-scale domain in numerical modelling and meta-heuristics optimization: Application to poroelastic media with damageable cracks, Albert Argilaga, Efthymios Papachristos, Materials, Vol. 14, number 3974, issue 14 (2021), doi:10.3390/ma14143974
| It is very common for natural or synthetic materials to be characterized by a periodic or quasi periodic micro structure. This micro structure, under the different loading conditions may play an important role on the apparent, macroscopic behaviour of the material. Although, fine, detailed information can be implemented at the micro structure level, it still remains a challenging task to obtain ex...
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| [101] | | Finite element implementation and application of a sand model in micropolar theory, Jiangxin Liu, Zhen Yu Yin, Lijian Wu, Pierre Yves Hicher, SN Applied Sciences, Vol. 3, number 465, issue 8 (2021), doi:10.1007/s42452-021-04708-z
| Abstract: In traditional finite element failure analyses of geotechnical structures, the micro grain rotations cannot be modelled and numerical solutions are mesh dependent. In this study, a user element including rotational degree of freedom has been developed based on micropolar theory (Cosserat theory), then an enhanced non associated sand model is calibrated with laboratory data and used to mo...
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| [102] | | Fragility analysis of concrete elevated water tanks under seismic loads, Amar Aliche, Hocine Hammoum, Karima Bouzelha, Younes Aoues, Ouali Amiri, Youcef Mehani, Frattura Ed Integrita Strutturale, Vol. 15, issue 57, pp. 93-113 (2021), doi:10.3221/IGF-ESIS.57.09
| The design of concrete elevated water tanks involves several kinds of uncertainties. Traditionally, the design of these structures is based on a deterministic analysis. Partial safety factors prescribed in design codes are applied to take into account these uncertainties and to ensure sufficiently safe design. However, this approach does not allow rational evaluation of the risk related to the str...
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| [103] | | Dimensional variation and evolution of mechanical properties of wet aged composites reinforced with flax fibers, Ziad El Hachem, Amandine Celino, Georges Challita, Samuel Branchu, Antoine Le Duigou, Sylvain Freour, Journal of Composite Materials, Vol. 55, issue 8, pp. 1131-1148 (2021), doi:10.1177/0021998320966045
| The aim of this study is to investigate the dimensional variation of polypropylene composites reinforced with UD flax fibers, and the modification of its dynamical mechanical properties after moisture absorption. The effects of fiber content, coupling agent and moisture content were also examined. Results have shown that the swelling increases significantly when increasing the fiber content and th...
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| [104] | | The role played by viscoelasticity in the bulk material during the propagation of a dynamic crack in elastomers, Vasudevan Kamasamudram, Michel Coret, Nicolas Moes, International Journal of Fracture, Vol. 27, number 431, issue 56 (2021), doi:10.1007/s10704-021-00561-8
| Investigation of dynamic fracture of elastomers can still be considered to be a relatively open area. When a sheet of elastomer is stretched in a tensile machine and a crack is introduced, the crack propagates at a speed that depends on the initial stretch level. There are instances where this speed is noted to exceed the shear wave speed based on the elastic modulus under high imposed stretches. ...
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| [105] | | Contribution of the capillary pressure second-order term on fast drying of cement-based materials, Yuliang Zou, Mazen Saad, Frederic Grondin, Construction and Building Materials, Vol. 296, number 123422, issue 5 (2021), doi:10.1016/j.conbuildmat.2021.123422
| Standard models used to predict moisture transport of cement based materials are based on quasi static behaviour laws. However, it is not appropriate for fast drying condition. In this paper, a model taking into account dynamic effects on capillarity pressure is presented for the analysis of moisture transport in deforming cement based materials. The proposed model is discretized in space by finit...
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| [106] | | Deflections of pneumatic masts and columns, J. C. Thomas, A. Le Van, Architectural Engineering and Design Management, Vol. 17, issue 3-4, pp. 299-315 (2021), doi:10.1080/17452007.2020.1738998
| Like all structural elements, inflatable beams can be subjected to combined loads. This may be the case for inflatable masts or inflatable columns supporting floors. This study addresses inflatable beams subjected to combinations of compression and bending. Whereas the mechanics of inflatable beams subjected only to transverse loading is now well established, the study of inflatable beams subjecte...
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| [107] | | Adherence of geopolymer and pultruded composite substrates: influence of adhesive type and surface treatment, Ana Passos, Ricardo de Aguiar, Hector Costa, Eduardo Sampaio, Silvio de Barros, Journal of Adhesion Science and Technology, Vol. 35, issue 16, pp. 1723-1733 (2021), doi:10.1080/01694243.2020.1859240
| In the last years, the use of adhesive bonding is increasing as an alternative to traditional joining techniques due to their advantages such as ease of application, low weight and the good mechanical properties. To ensure good adherence between the substrates, adequate materials and surface treatment are required. The main objective of this work is to evaluate the adherence of epoxy and polyureth...
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| [108] | | Effect of re-saturation after drying on hydric and strength behaviour of mortar, I. Yurtdas, N. Leklou, Materials and Structures Materiaux Et Constructions, Vol. 54, number 129, issue 5 (2021), doi:10.1617/s11527-021-01780-0
| This experimental study investigates the effect of re saturation after air drying and oven drying at 60 °C on the evolution of hydric and strength behaviour of a standard mortar. Various tests are carried out and lead to the following observations. The swelling occurs relatively quickly, then remains constant and slightly lower than the drying shrinkage for air dried samples, whereas for oven drie...
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| [109] | | Concrete in a severe freezing environment: a meteorological characterization, Laurent Izoret, Sara Al Haj Sleiman, Nadare Matoiri-Chaibati, Frederic Grondin, Materials and Structures Materiaux Et Constructions, Vol. 54, number 896, issue 1 (2021), doi:10.1617/s11527-020-01603-8
| When comparing the different test methods for concrete resistance to scaling and the crucial lack of correlation between laboratory test results and field results, the representativeness of these methods can be questioned. Many researchers have tried to clarify most of the mechanisms involved in the damage due to scaling, as well as thermal parameters influencing damage intensity. However, what ca...
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| [110] | | A coupled closed-form/Doubly Asymptotic Approximation approach for the response of orthotropic plates subjected to an underwater explosion, Ye Pyae Sone Oo, Herve Le Sourne, Olivier Dorival, Ships and Offshore Structures, Vol. 16, issue sup1, pp. 171-185 (2021), doi:10.1080/17445302.2021.1918962
| A closed form analytical solution procedure is proposed to solve the coupled fluid structure interaction (FSI) equations that involve the first order Doubly Asymptotic Approximation (DAA1) formulation. An efficient method comprised of the nonstandard finite difference (NSFD) scheme is applied. First of all, analytical equations are developed to analyze the response of a rigid mass sprin...
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| [111] | | A new mechanism-based temperature-dependent viscoelastic model for unidirectional polymer matrix composites based on Cartan decomposition, L. Di Gennaro, F. Daghia, M. Olive, F. Jacquemin, D. Espinassou, European Journal of Mechanics A Solids, Vol. 90, number 104364, issue 2217 (2021), doi:10.1016/j.euromechsol.2021.104364
| A new three dimensional temperature dependent viscoelastic constitutive model for unidirectional fiber reinforced, polymer composite materials subjected to small strains is developed in this work. The key point is to introduce the viscoelastic behavior only where appropriate, based on the constitutive behavior of the underlying constituents: in particular, the matrix deviatoric response is conside...
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| [112] | | Measuring coarse grain deformation by digital image correlation, Claire Silvani, Julien Rethore, Sylvie Nicaise, Strain, Vol. 57, number 3, issue 3 (2021), doi:10.1111/str.12378
| This work presents results from oedometric compression of coarse granular material. Coarse granular media exhibit significant deformations making it complicated to predict the settlement of structures. In this paper, a measurement technique was developed for the analysis of two dimensional (2 D) images of a deforming coarse granular medium to investigate its deformation. This was achieved by reali...
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| [113] | | Simple and Versatile Analytical Method for Monitoring the Deposition of Thin Layers by Optical Measurement and Calculation of Residual Stress, Quentin Hatte, Mireille Richard-Plouet, Pierre Yves Jouan, Pascal Casari, Pierre Antoine Dubos, Thin Solid Films, Vol. 725, number 138635 (2021), doi:10.1016/j.tsf.2021.138635
| This paper develops a simple and versatile analytical method for characterizing residual stress associated with the deposition of thick, thin, single and multilayer coatings. This study is of great importance, since the generation of residual stress can lead to the formation of significant defects in the coating. To illustrate the effectiveness of our analytical method, two different processes wer...
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| [114] | | Magnetic pulse hybrid joining of polymer composites to metals, Chady Khalil, Surendar Marya, Guillaume Racineux, Metals, Vol. 11, number 2001, issue 12 (2021), doi:10.3390/met11122001
| To lighten their vehicles, car manufacturers are inclined to substitute steel structures with aluminum alloys or composites parts. They are then faced with the constraints inherent to dissimilar (galvanized steel/aluminum) or hybrid (metal/composite) assemblies. Recent developments in magnetic pulse welding seems to offer a viable route. Very fast, this process can be robotized and generates a ver...
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| [115] | | Multifield variational formulations of diffusion initial boundary value problems, Jorge de Anda Salazar, Thomas Heuze, Laurent Stainier, Continuum Mechanics and Thermodynamics, Vol. 33, issue 2, pp. 563-589 (2021), doi:10.1007/s00161-020-00931-y
| We present two multifield and one single field variational principles for the initial boundary value problem of diffusion. Chemical potential and concentration appear as conjugate variables in the multifield formulations. The main importance of the proposed formulations is the approach used to generate the variational principles, where the framework of Generalized Standard Materials is used for co...
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| [116] | | Inverse methodology as applied to reconstruct local textile features from measured pressure field, S. Bancora, C. Binetruy, S. Advani, S. Comas-Cardona, Journal of Materials Science and Technology, Vol. 71, pp. 241-247 (2021), doi:10.1016/j.jmst.2020.09.010
| One can compute the final deformation of a known geometry under specific boundary conditions using the constitutive laws of mechanics that describe their stress strain behavior. In such cases the initial geometry is known, and all operators mapping the deformation are defined on the reference domain. However, there are situations in which the final configuration of a deformation might be known but...
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| [117] | | A numerical investigation to determine the py curves of laterally loaded piles, Kexin Yin, Lianghui Li, Eugenia Di Filippo, Mathematics, Vol. 9, number 2783, issue 21 (2021), doi:10.3390/math9212783
| This paper focuses on a numerical approach to finding the py curves for laterally loaded piles. The DruckerPrager plastic model is employed and implemented within a finite element MATLAB code. The pre and post processing code for Gmsh and related numerical tools are established as well. The py curve results from this new approach have been validated and compared to the typical design equations of ...
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| [118] | | Thermal monitoring for metallic additive manufacturing multi-beads multi-layers parts, Matthieu Rauch, Jean Yves Hascoet, Clement Rousseau, Guillaume Ruckert, Journal of Machine Engineering (2021), doi:10.36897/jme/139158
| Among Metallic Additive Manufacturing processes, Directed Energy Deposition (DED) processes are very promising for the Industry. An issue that prevents a larger development of DED is the reliability of the process, since its complexity makes the result of the manufacturing variable. Thermal behavior is a critical aspect for which uncontrolled phenomena can lead to part failure. Some thermal monito...
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| [119] | | Development of a damage viscoelastic model using the thick level set approach to fracture: 1D modeling and comparison to uniaxial tension stress tests on bituminous specimens, Benjamin Shiferaw, Olivier Chupin, Jean Michel Piau, Nicolas Moes, Engineering Fracture Mechanics, Vol. 257, number 108026, issue 4 (2021), doi:10.1016/j.engfracmech.2021.108026
| The present paper deals with the development of a mechanical model coupling damage and viscoelasticity for applications related to fracture in bituminous materials and structures. The behavior of these materials is highly thermo sensitive and depends on the loading rate. Currently, there is no consensus on a modeling approach able to capture their behavior to fracture for a wide range of temperatu...
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| [120] | | Extending High Value Components Performances with Additive Manufacturing: Application to Naval Applications, Matthieu Rauch, Gatien Pechet, Jean Yves Hascoet, Guillaume Ruckert, Solid State Phenomena, Vol. 319, pp. 58-62 (2021), doi:10.4028/www.scientific.net/SSP.319.58
| Additive Manufacturing (AM), consists of depositing material in successive layers to obtain the desired part. The parts produced by AM can thus adopt geometries inaccessible by conventional manufacturing means, for example hollow or lattice structures which considerably reduce their weight while keeping or even improving their mechanical properties. Among the many existing processes, Wire Arc Addi...
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| [121] | | Temporal analysis of the performance of an elevated concrete tank considering the corrosion of the steel reinforcement, Nassima Miloudi, Karima Bouzelha, Hocine Hammoum, Younes Aoues, Ouali Amiri, Frattura Ed Integrita Strutturale, Vol. 15, issue 56, pp. 94-114 (2021), doi:10.3221/IGF-ESIS.56.08
| Reinforced concrete water storage tanks are civil engineering structures subject to very aggressive atmospheric conditions that expose them to harmful corrosion risk. This dangerous phenomenon caused by the penetration of chloride ions causes pitting corrosion and leads to the reduction of the section of the reinforcements and consequently to the loss of strength and the structure performance. In ...
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| [122] | | Investigation of the reversible response of track ballast considering complementary approaches, Olivier Chupin, Jean Michel Piau, Antoine Martin, Christophe Dano, Pierre Yves Hicher, Transportation Geotechnics, Vol. 26, number 100436, issue 6 (2021), doi:10.1016/j.trgeo.2020.100436
| This paper aims at showing that the reversible behavior of track ballast can be reasonably modeled by a homogeneous elastic layer in the computation of the reversible dynamic response of railway structures subjected to moving train loads. To accomplish this, 2D simulations by means of the discrete element method (DEM) and triaxial tests were carried out. Importantly, these two approaches were perf...
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| [123] | | Dynamic view of critical state regime in granular materials: a mesoscale perspective, Na Deng, Antoine Wautier, Yannick Thiery, Zhen Yu Yin, Pierre Yves Hicher, Francois Nicot, EPJ Web of Conferences, Vol. 249, number 11011 (2021), doi:10.1051/epjconf/202124911011
| We revisit the Critical State (CS) in a dynamic perspective at a mesoscopic scale to enrich the classical view of the critical state as a steady state. The dynamics of meso structures has been characterized by recording generating and vanishing processes in discrete element simulations. Our results suggest that meso structures have a short but regular lifespan at critical state along a biaxial com...
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| [124] | | Curling evolution of a cementitious slab: experimental study and discrete element modelling, Reda Jaafri, Faten Souayfan, Ran Zhu, Syed Yasir Alam, Emmanuel Roziere, Ahmed Loukili, Materials and Structures Materiaux Et Constructions, Vol. 54, number 22, issue 1 (2021), doi:10.1617/s11527-020-01606-5
| Differential shrinkage can cause curling of ground supported floor slabs. The curling can be significant when the drying kinetics of the material is high, and may cause cracking if the movements of the slab are restrained. This paper presents a Discrete Element Method based approach for accurate prediction of short term and long term curling of a floor slab subjected to surface drying. A linear re...
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| [125] |  | Octree optimized micrometric fibrous microstructure generation for domain reconstruction and flow simulation, Nesrine Aissa, Louis Douteau, Emmanuelle Abisset-Chavanne, Hugues Digonnet, Patrice Laure, Luisa Silva, Entropy, Vol. 23, number 1156, issue 9 (2021), doi:10.3390/e23091156
| Over recent decades, tremendous advances in the field of scalable numerical tools and mesh immersion techniques have been achieved to improve numerical efficiency while preserving a good quality of the obtained results. In this context, an octree optimized microstructure generation and domain reconstruction with adaptative meshing is presented and illustrated through a flow simulation example appl...
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| [126] | | Characterization of mesoscale geometrical features of a preform using spectral Moire analysis on pressure print, S. Bancora, C. Binetruy, S. Advani, S. Comas-Cardona, Composites Part A Applied Science and Manufacturing, Vol. 150, number 106608, issue 6 (2021), doi:10.1016/j.compositesa.2021.106608
| In the frame of LCM processes, the mesoscopic architecture of a preform is defined by the sequential stacking of layers in the mold. Once the compaction is carried out, the precise orientation of layers and spatial distribution of tows is difficult to know with precision. The lack of this information can lead to a wrong prediction of properties. In this work, we present a new non destructive metho...
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| [127] | | High-frequency leaky whispering-gallery modes in embedded elastic spheres, Fabien Treyssede, Matthieu Gallezot, Physical Review B, Vol. 104, number 25, issue 21 (2021), doi:10.1103/PhysRevB.104.214101
| The goal of this paper is to investigate the characteristics of high frequency whispering gallery modes in embedded elastic spheres, that is, surrounded by an infinite elastic matrix. Due to several modeling difficulties, the high frequency regime of embedded spheres has remained unexplored in elasticity. Our approach consists of formulating a specific finite element method in spherical coordinate...
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| [128] | | On damage regularity defect nucleation modelling, Claude Stolz, International Journal of Solids and Structures, Vol. 229, number 111107, issue 3 (2021), doi:10.1016/j.ijsolstr.2021.111107
| The purpose of this article is to model defect nucleation. The defect is considered as a small volume which evolves as a damaged zone. The damage is described by a transition zone which can be sharp or continuous. In the first case, discontinuities occur and the initiation of defect is based on bifurcation of an equilibrium state. When the transition is continuous, the initiation of the defect is ...
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| [129] | | A generalized Fourier transform by means of change of variables within multilinear approximation, Mathilde Chevreuil, Myriam Slama, Advanced Modeling and Simulation in Engineering Sciences, Vol. 8, number 773, issue 1 (2021), doi:10.1186/s40323-021-00202-8
| The paper deals with approximations of periodic functions that play a significant role in harmonic analysis. The approach revisits the trigonometric polynomials, seen as combinations of functions, and proposes to extend the class of models of the combined functions to a wider class of functions. The key here is to use structured functions, that have low complexity, with suitable functional represe...
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| [130] | | Residual stresses developed in thermoplastic composites during laser-assisted tape laying, Anna Maria El Bayssari, Frederic Jacquemin, Mael Peron, Anais Barasinski, Federica Daghia, Damien Guillon, ESAFORM 2021 (2021), doi:10.25518/esaform21.2667
| The main focus of the study is the determination of residual stresses developed in thermoplastic composites during tape placement. An experimental characterization of the residual stresses is carried out and based on the measurement of the curvature variation with temperature for unsymmetrical laminates. The tested plates are made of APC 2 and processed on the SPIDE TP, a filament winding machine ...
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| [131] | | Correction to: The role played by viscoelasticity in the bulk material during the propagation of a dynamic crack in elastomers (International Journal of Fracture, (2021), 10.1007/s10704-021-00561-8), Vasudevan Kamasamudram, Michel Coret, Nicolas Moes, International Journal of Fracture (2021), doi:10.1007/s10704-021-00573-4
| The original online version of this article was revised due to typesetting mistakes made regarding the captions of the figures 12 and 13....
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| [132] |   | Correction to: reduced order modeling of selective laser melting: from calibration to parametric part distortion (International Journal of Material Forming, (2021), 14, 5, (973-986), 10.1007/s12289-021-01613-z), Chady Ghnatios, Khalil El Rai, Nicolas Hascoet, Pierre Adrien Pires, Jean Louis Duval, Jon Lambarri, Jean Yves Hascoet, Francisco Chinesta, International Journal of Material Forming, Vol. 14, issue 5, pp. 987-987 (2021), doi:10.1007/s12289-021-01638-4
| The article Reduced order modeling of selective laser melting: from calibration to parametric part distortion, written by Chady Ghnatios, Khalil El Rai, Nicolas Hascoet, Pierre Adrien Pires, Jean Louis Duval, Jon Lambarri, Jean Yves Hascoet, Francisco Chinesta was originally published electronically on the publishers internet portal on 31 March 2021 without open access. With the author(s) decisio...
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| [133] | | Editorial: Recent Advances in Service Life Prediction of Bridges and Structures, Marija Kuster Maric, Emilio Bastidas-Arteaga, Frontiers in Built Environment, Vol. 6 (2021), doi:10.3389/fbuil.2020.630554
| ...
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| [134] | | Correction to: Model reduction in computational homogenization for transient heat conduction (Computational Mechanics, (2020), 65, 1, (249-266), 10.1007/s00466-019-01767-3), A. Waseem, T. Heuze, L. Stainier, M. G.D. Geers, V. G. Kouznetsova, Computational Mechanics, Vol. 68, issue 1, pp. 231-231 (2021), doi:10.1007/s00466-021-02040-2
| A Correction to this paper has been published: https://doi.org/10.1007/s00466 019 01767 3....
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| [135] | | Invariant integrals and asymptotic fields near the front of a curved planar crack, C. Stolz, International Journal of Fracture, Vol. 24, number 109, issue 1 (2021), doi:10.1007/s10704-021-00552-9
| A plane crack is considered and the influence of local curvature of the crack front on the local mechanical fields is studied. The main goal is to determine the stress intensity factors along a curved planar crack in linear elasticity with accuracy. This is obtained by determination of new test fields and the use of bilinear forms, issued from invariant integrals, which separate the local modes of...
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| [136] | | Effect of fly ash on microstructural and resistance characteristics of dredged sediment stabilized with lime and cement, Ana Paula Furlan, Andry Razakamanantsoa, Harifidy Ranaivomanana, Ouali Amiri, Daniel Levacher, Dimitri Deneele, Construction and Building Materials, Vol. 272, number 121637, issue 7 (2021), doi:10.1016/j.conbuildmat.2020.121637
| This study deals with the definition of an efficient combination of fly ash (FA) with lime or cement and with both, to improve the dredged sediment (DS) properties. At early age, filler and nucleation effects of FA lead to a refinement of the microstructure in addition to the macro porosity reduction induced by lime and cement. At long term, the microstructure becomes denser due to the pozzolanic ...
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| [137] | | Investigation of self-heating and damage progression in woven carbon fibre composite materials, following the fibres direction, under static and cyclic loading, Laura Muller, Jean Michel Roche, Antoine Hurmane, Francois Henri Leroy, Catherine Peyrac, Laurent Gornet, Journal of Composite Materials, Vol. 55, issue 26, pp. 3909-3924 (2021), doi:10.1177/00219983211025690
| Infrared thermography is commonly used as a non destructive testing technique for damage monitoring of composite materials under mechanical loadings. Self heating tests consist in monitoring the stabilized heating of a material submitted to cyclic loading for increasing values of stress level. It appears that the load threshold from which the thermal behaviour changes can be related to the fatigue...
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| [138] | | Effect of temperature on the chloride binding capacity of cementitious materials, Van Quan Tran, Hoang Long Nguyen, Dong Van Dao, Benoit Hilloulin, Long Khanh Nguyen, Quang Hung Nguyen, Tien Thinh Le, Hai Bang Ly, Magazine of Concrete Research, Vol. 73, issue 15, pp. 771-784 (2021), doi:10.1680/jmacr.19.00484
| The effect of temperature on the chloride binding capacity (CBC) of cementitious materials was investigated. A reactive transport model including thermodynamic equilibrium, kinetic control and surface complexation was applied to investigate this effect. The surface complexation model was completed by introduction of the equilibrium constant of calcium silicate hydrate (C S H) complexation reaction...
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| [139] | | Parametric PGD model used with orthogonal polynomials to assess efficiently the building's envelope thermal performance, Marie Helene Azam, Julien Berger, Sihem Guernouti, Philippe Poullain, Marjorie Musy, Journal of Building Performance Simulation, Vol. 14, issue 2, pp. 132-154 (2021), doi:10.1080/19401493.2020.1868577
| Estimating the temperature field of a building envelope could be a time consuming task. The use of a reduced order method is then proposed: the Proper Generalized Decomposition method. The solution of the transient heat equation is then re written as a function of its parameters: the boundary conditions, the initial condition, etc. To avoid a tremendous number of parameters, the initial condition ...
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| [140] | | A full three-dimensional model for the estimation of the natural frequencies of an offshore wind turbine in sand, Philip Alkhoury, Abdul Hamid Soubra, Valentine Rey, Mourad Ait-Ahmed, Wind Energy, Vol. 24, issue 7, pp. 699-719 (2021), doi:10.1002/we.2598
| The design of an offshore wind turbine (OWT) founded on a monopile foundation is principally based on dimensioning criteria related to its fundamental frequencies. These frequencies must remain outside the excitation frequencies to avoid resonance. For the calculation of the OWT natural frequencies, several studies exist, but few of them simultaneously consider both the real geometrical configurat...
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| [141] | | Improved active learning probabilistic approach for the computation of failure probability, Abdul Kader El Haj, Abdul Hamid Soubra, Structural Safety, Vol. 88, number 102011 (2021), doi:10.1016/j.strusafe.2020.102011
| This paper presents a cost effective probabilistic approach to be used in engineering applications. The proposed approach consists of an improved Kriging based method aiming at reducing to a minimum the number of evaluations of the true performance function when computing a failure probability. It is a kind of variant of the classical Active learning method combining Kriging and Monte Carlo Simula...
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| [142] | | High-order X-FEM for the simulation of sound absorbing poro-elastic materials with coupling interfaces, Shaoqi Wu, Olivier Dazel, Gwenael Gabard, Gregory Legrain, Journal of Sound and Vibration, Vol. 510, number 116262, issue 4 (2021), doi:10.1016/j.jsv.2021.116262
| In this paper, the acoustic field with the presence of poro elastic materials is simulated by the eXtended Finite Element Method (X FEM). Problems involving interfaces between different media are our main focus. The proposed method allows interfaces to be embedded in the finite elements, easing significantly the discretization, especially when the geometry of the interface is complex. The gradient...
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| [143] | | Effect of Scalping on the Mechanical Behavior of Coarse Soils, Nadine Ali Hassan, Ngoc-Son Nguyen, Didier Marot, Fateh Bendahmane, International Journal of Geotechnical and Geological Engineering (2021)
| This paper aims at presenting a study of the effect of scalping methods on the mechanical properties of coarse soils by resorting to numerical simulations based on the discrete element method (DEM) and experimental triaxial tests. Two reconstitution methods are used, designated as scalping method and substitution method. Triaxial compression tests are first simulated on a granular materials with a...
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| [144] | | Learning data-driven reduced elastic and inelastic models of spot-welded patches, Agathe Reille, Victor Champaney, Fatima Daim, Yves Tourbier, Nicolas Hascoet, David Gonzalez, Elias Cueto, Jean Louis Duval, Francisco Chinesta, Mechanics & Industry, Vol. 22, number 32 (2021), doi:10.1051/meca/2021031
| Solving mechanical problems in large structures with rich localized behaviors remains a challenging issue despite the enormous advances in numerical procedures and computational performance. In particular, these localized behaviors need for extremely fine descriptions, and this has an associated impact in the number of degrees of freedom from one side, and the decrease of the time step employed in...
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| [145] | | Analysis of the delayed damage model for three one-dimensional loading scenarii, Jihed Zghal, Nicolas Moes, Comptes Rendus. Physique, Vol. 21, issue 6, pp. 527-537 (2021), doi:10.5802/crphys.42
| The delayed damage model has been introduced by Allix and Deu [1] as a way to overcome spuriousmesh dependency in failure analysis involving damage and dynamic loading. The damage rate is boundedthrough a time scale which, combined with the wave speed, introduces implicitly a length scale. In this paper,the delayed damage model is analyzed through numerical experiments on three different loading c...
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| [146] | | Determination of the size and the number of samples to be analyzed in the laboratory for the statistical characterization of the microstructure of a clayrock, Anne-Laure Fauchille, Bram van den Eijnden, Kevin Taylor, Peter David Lee, Revue francaise de Geotechnique, Vol. 326, number 1, issue 165 (2021), doi:10.1051/geotech/2020024
| At the laboratory scale, clayrocks are heterogeneous materials and their thermo hydromechanical behaviour is generally controlled by the microstructure. Choosing the number and size of samples is therefore a key point to both decrease and understand microstructure variability in the laboratory, at small scales. This paper focuses on a statistical method, which consists in dividing numerically an i...
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| [147] | | Multiaxial fatigue experiments for elastomers based on true strain invariants, Etienne Le Mire, Erwan Verron, Bertrand Huneau, Nathan Selles, Journal of Rubber Research, Vol. 24, issue 2, pp. 227-236 (2021), doi:10.1007/s42464-021-00088-6
| For decades, multiaxial fatigue tests have been proposed in order to derive models for fatigue life prediction of elastomers. Nevertheless, the importance of quantifying the multiaxiality has not sufficiently been discussed. In this paper, a new method is proposed to handle the multiaxiality in elastomers fatigue testing. It is based on the pair (K2, K3), two invariants of the Hencky (true) strain...
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| [148] | | Emerging, hybrid & smart composites, Christophe Binetruy, Veronique Michaud, Functional Composite Materials, Vol. 2, issue 1 (2021), doi:10.1186/s42252-021-00028-y
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| [149] | | Numerical Study of Low Rank Approximation Methods for Mechanics Data and Its Analysis, Lucas Lestandi, Journal of Scientific Computing, Vol. 87, number 273, issue 1 (2021), doi:10.1007/s10915-021-01421-2
| This paper proposes a comparison of the numerical aspect and efficiency of several low rank approximation techniques for multidimensional data, namely CPD, HOSVD, TT SVD, RPOD, QTT SVD and HT. This approach is different from the numerous papers that compare the theoretical aspects of these methods or propose efficient implementation of a single technique. Here, after a brief presentation of the st...
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| [150] | | Adhesion of epoxy and polyurethane adhesives in pultruded composite material, A Passos, M Arouche, R Aguiar, H Costa, Silvio DE BARROS, E Sampaio, Journal of Advanced Joining Processes, Vol. 3, number 100045, issue 1 (2021), doi:10.1016/j.jajp.2021.100045
| An increase in applications of pultruded composite material has been noted in the last decades. The material is usually employed in sectors that require high mechanical properties as well as chemical and corrosion resistance. The pultruded profiles can be joined by mechanical fasteners (i.e. bolts) or adhesive bonding. Bonded joints present many advantages, such as low weight, design flexibility a...
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| [151] | | Non steady-state intersonic cracks in elastomer membranes under large static strain, Thomas Corre, Michel Coret, Erwan Verron, Bruno Leble, Journal of Theoretical, Computational and Applied Mechanics (2021), doi:10.46298/jtcam.6906
| Dynamic crack propagation in elastomer membranes is investigated; the focus is laid on cracks reaching the speed of shear waves in the material. The specific experimental setup developed to measure crack speed is presented in details. The protocol consists in (1) stretching an elastomer membrane under planar tension loading conditions, then (2) initiating a small crack on one side of the membrane....
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| [152] | | In-situ monitoring of micro-tunnel geometry change based on distributed optical fiber strain sensing, Arianna Piccolo, Yann Lecieux, Dominique Leduc, Sylvie Delepine-Lesoille, Frederic Bumbieler, Beatrice Yven, Smart Materials and Structures, Vol. 31, number 025004, issue 2 (2021), doi:10.1088/1361-665x/ac40dc
| Abstract Underground radioactive waste disposal facilities must be monitored to guarantee their correct and safe exploitation during the early stage of their service life. This will be the case in Cigeo, the french industrial geological disposal facility for high level and intermediate level long lived waste, which must be monitored for the first a hundred years at least. For this purpose optical ...
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| [153] | | Experimental Analysis of Composite-to-geopolymer Bonded Structures Using Pull off Tests, A Passos, M Arouche, R Aguiar, H Costa, E Sampaio, Silvio DE BARROS, Materials Research, Vol. 24, number 381, issue suppl 2 (2021), doi:10.1590/1980-5373-mr-2021-0461
| Composite materials are employed as an alternative of conventional materials due their attractive properties, such as, environmental resistance and high strength to weight ratio. However, a limitation to the application of the composites is the low resistance to high temperatures, due their polymeric matrix. Alternatively, geopolymers are inorganic polymers used mainly instead Ordinary Portland Ce...
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