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Cohesive Zone based conformal meshing and damage simulation of yarn contacts in woven composite

par Li, Anqi ;Wintiba, Badadjida ;Remmers, Joris J.C.;Geers, M.G.D.;Massart, Thierry,Jacques
Référence Composites 2021(8: 22-24/9/2021: Online Conference), Proceedings of 8th Conference on Mechanical Response of Composites (Composites 2021)
Publication Publié, 2021-09-24

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Résumé :

The mechanical response of woven composites under off-axis tensile loading is closely governed by the damage mechanism in the yarn-yarn/matrix interfaces. For off-axis tensile loading, the yarns will reorient towards the loading direction and lead to a rather ductile behavior after the decohesion of the yarn contact interfaces. Recent works [1] have proposed an automated methodology to generate a RVE geometry based on implicit descriptions based on distance fields, resulting in geometries free of yarn interpenetration by inserting a gap between yarns to enable a conformal discretization. However, this leads to high computational costs due to refined elements in the gap region during the simulations. This contribution extends this methodology to extract the geometry of contacting surfaces from the distance fields which can be subsequently used in a conformal meshing strategy for the RVE with cohesive zone elements (CZE). The numerical simulation of the plain weave RVE with shear loading are led in ABAQUS in which a softening response can be reproduced due to the damage of CZE in interface and plasticity in matrix.