Using crystal plasticity finite element method to investigate the mechanical properties under uniaxial compression

摘要

Microstructure has great influences on the mechanical properties. In this paper, the rate-dependent constitutive model has been developed and implemented by user-defined material subroutine. A series of simulations have been done to test the subroutine. Cu single crystal (with FCC crystal structure) have been simulated under uniaxial compression process. Four slip systems have been activated which agrees well with the experiment results. Polycrystalline Mg alloy (with HCP crystal structure) has been simulated under uniaxial compression process with different strain rates. And results show that with the increasing strain rates, the stress increases, which agrees well with the experiment results. And different element types have been tested, however, no obvious difference in stress-strain curves has been found in this simulation.