The accuracy of finite element analyses of impact phenomena depends primarily on the use of an appropriate material model and a convergent mesh. An elastoplastic damage model suitable for modeling ductile metals is presented. The model was applied in simulations of projectile perforation through a plate made of aluminium alloy 2024-T351, using explicit thermo-mechanical analyses. In the simulations, the plate thickness, initial projectile velocity, and element size were varied. Mesh convergence of the specific problem was characterized, and recommendations were provided for selecting element sizes in similar applications.
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