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Génération de VERs et calcul d'homogénéisation : application aux composites thermoplastiques à renforts discontinus

Abstract : This study aims to develop representative elementary volumes (RVEs) of polymer composites with discontinuous reinforcements. The generation and homogenization of such element will help to better understand the influence of parameters such as fibers volume fraction, fiber orientation and length distributions on the mechanical behavior of the composite. The composite investigated in this study is a Polyamide 6-6 (PA 6.6) reinforced with short glass fibers. Numerical simulations were performed using a parallel C++ library Cimlib developed at CEMEF that allows introduction of an immersed FE strategy (FE context-level set framework-meshing adaptation) for RVEs generation and a classical multidomain lagrangian formulation with an enhanced body-fitted remeshing framework when dealing with RVEs deformation. Numerical simulations under tensile loading were performed on different elastic microstructures in the aim of determining the longitudinal and transversal Young moduli. Local stress concentration was also analyzed.
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Submitted on : Friday, November 10, 2017 - 4:27:21 PM
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Ivan Coppo, Daniel Pino Muñoz, Marc Bernacki, Jean-Luc Bouvard. Génération de VERs et calcul d'homogénéisation : application aux composites thermoplastiques à renforts discontinus. 23ème Congrès Français de Mécanique [CFM2017], Association Française de Mécanique (AFM), Aug 2017, Lille, France. ⟨hal-01632652⟩

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