Applications of multi-scale models to numerical simulation and experimental analysis of anisotropic elastoplastic behavior of metallic sheets

摘要

In this paper anisotropic mechanical behavior of AA2024 aluminum and Ti6A14V titanium alloys were studied using three different constitutive approaches: unified, multi-mechanism and polycrystalline. Comparison between experimental results (taken from the literature) and numerical simulations shows that the multi-mechanism and polycrystalline models describe slightly better the plastic anisotropy when considering all the directions. Finite element (FE) simulations of deep drawing test of AA2024 aluminum thin sheets are analyzed using the three elasto-plastic models.