Elastic/crystalline viscoplastic finite element modeling based on hardening-softening evolution equation

摘要

The elastic/crystalline viscoplastic model is proposed by employing the hardening and softening evolution equations and crystalline orientation distributions - texture -.This crystalline plasticity model is implemented in the dynamic explicit finite element code to simulate the plastic instability of rectangular sheet tension. We investigate how the interaction between the slip-system affects on the hardening and softening of crystal itself, where the effective distance between the slip system is introduced. The polycrystalline morphology of aluminum sheet material was modeled by employing the Voronoi polygon and the selected orientations - texture - of FCC old rolled sheet. The influences of the parameter of hardening-softening evolution, the effective distance, the size of the crystal grain on the strain localization were studies.