Numerical implementation of crystal plasticity model for face centered cubic crystals

Abstract

This study is focused to understand the deformation behavior of face centered cubic (fcc) metals through finite element simulations of tensile response of such materials. For this purpose, a physics based crystal plasticity model for fcc crystals which accounts for motion of dislocations and their influence on the plastic deformation is implemented in commercially available software package Abaqus 6.14 by writing material subroutine UMAT. The accuracy and performance of the numerical implementation is confirmed by comparing the predictions of tensile response from FE simulations with recent experimental data for single crystal Aluminum corresponding to wide range of temperature and strain rates. Computations are also performed to analyze the deformation response of single crystal Cu. Finally, the effect of applied strain rates and the orientation on crystals on the tensile response of Aluminum bicrystal is investigated.