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Laboratoire de modélisation mécanique multi-échelle
LaboratoirePublications associées (1 000)
Simple shear extrusion versus equal channel angular pressing: A comparative study on the microstructure and mechanical properties of an Mg alloy
Roland Logé, Cyril Cayron, Aryan Rezaei Rad
Two severe plastic deformation (SPD) techniques of simple shear extrusion (SSE) and equal channel angular pressing (ECAP) were employed to process an extruded Mg -6Gd -3Y -1.5Ag (wt%) alloy at 553 K for 1, 2, 4 and 6 passes. The microstructural evolutions ...
KEAI PUBLISHING LTD2023Experimental investigation of rotational behavior of pseudo-ductile adhesive angle joints exhibiting variable strain rate
Thomas Keller, Ghazaleh Eslami
Pseudo-ductile behavior in composite structural frames can be achieved by enabling their beam-column joints to exhibit nonlinear structural response due to progressive damage, by using pseudo-ductile adhesives. This study investigates the static behavior o ...
2023Finite element investigation of the Slotted-Hidden-Gap (SHG) connection for square HSS bracing members under cyclic loading
The Slotted-Hidden-Gap (SHG) connection is an improved version of the conventional welded tube-togusset connection between hollow braces and framing elements used in Concentrically Braced Frames (CBFs), offering an enhanced performance without the need for ...
2023The effect of in-situ linear stress gradient on the frictional shear rupture growth in 2D
Brice Tanguy Alphonse Lecampion, Regina Fakhretdinova, Alexis Alejandro Sáez Uribe
Deep heat mining requires activation of slip on pre-existing geological discontinuities and the creation of hydraulically conductive fracture networks. Fluid injection or diffusion of ground waters can rise the fluid pressure near pre-existing fractures an ...
2023Origin of the enhanced pseudo-elasticity of additively manufactured Fe-17Mn-5Si-4Ni-10Cr-(V, C) shape memory alloy fabricated by laser powder bed fusion
Christian Leinenbach, Irene Ferretto
This study investigated the origin of the enhanced pseudo-elasticity of additively manufactured vanadium carbide-containing Fe-based shape memory alloys. The aged samples with two different starting microstructures, as-built and solution-treated, showed co ...
Lausanne2023Solids that are also liquids: elastic tensors of superionic materials
Nicola Marzari, Tommaso Chiarotti, Giuliana Materzanini
Superionics are fascinating materials displaying both solid- and liquid-like characteristics: as solids, they respond elastically to shear stress; as liquids, they display fast-ion diffusion at normal conditions. In addition to such scientific interest, su ...
NATURE PORTFOLIO2023EBSD study of variant reorientation, texture, and twin formation in a martensitic NiTi alloy deformed in compression
Roland Logé, Cyril Cayron, Mathijs Pieter van der Meer, Junfeng Xiao
Martensitic crystallography plays a vital role in the texture evolution and mechanical properties in Nickel-Titanium (NiTi) shape memory alloys when subjected to deformation. However, their microstructural changes during deformation are not well known and ...
Oxford2023Deformation response of highly stretchable and ductile graphene kirigami under uniaxial and biaxial tension
Kirigami, the ancient technique of paper cutting, has been successfully applied to enhance the stretchability and ductility of nanoscale graphene. However, existing experimentally realized graphene kirigami (GK) are created by introducing parallel cuts, ex ...
College Pk2023Influence of Fiber Orientation on the Elastic Limit Tensile Stress of UHPFRC
Eugen Brühwiler, Emmanuel Denarié, Jian Zhan
The elastic limit tensile stress of UHPFRC is governed by contributions of the cementitious matrix and the fibrous skeleton. This paper finds that fiber orientation has significant influence on the matrix tensile strength of UHPFRC, while this is not consi ...
2023Crack tip kinematics reveal the process zone structure in brittle fracture
John Martin Kolinski, Chenzhuo Li, Xinyue Wei
When brittle hydrogels fail, several mechanisms conspire to alter the state of stress near the tip of a crack, and it is challenging to identify which mechanism is dominant. In the fracture of brittle solids, a sufficient far-field stress results in the co ...
PERGAMON-ELSEVIER SCIENCE LTD2023