Numerical study of anisotropic behavior of Aluminum alloy subjected to dynamic perforation

A numerical investigation was carried out to analyze in details the perforation process of target AA5754-0 Aluminum plate when subjected to normal impact at low (up to 25 ms(-1)) and moderate velocities (ranged between 25-50 ms(-1)). A fully coupled elasto-visco-plastic-damage model is implemented into a user defined material (VUMAT) subroutine for the commercial finite element code ABAQUS/Explicit. The strain rate effect is considered. Comparison between isotropic J(2) and orthotropic Hill yield criteria associated with isotropic and mixed non-linear isotropic/kinematic hardening was conducted. A parametric study of the effect of anisotropy, plate thickness and impactor nose shapes on ballistic limit and petal forming is carried out. A good agreement is found between numerical and experimental results conducted by other researchers. (C) 2016 Elsevier Ltd. All rights reserved.