Effects of grain-to-grain interactions on shear strain localization in Al–Cu–Li rolled sheets

摘要: Abstract Crystal plasticity finite element simulations of tensile tests on thin polycrystalline samples with grain orientations representative the microstructure in Al–Cu–Li rolled sheets are carried out to study influence grain-to-grain interactions plastic strain localization. Anisotropic work-hardening and rate-sensitivity material behavior assumed. The grains modeled as platelets through-thickness direction, elongated rolling transverse directions. only distinctive feature present respect standard crystal calculations is enforcement tangential continuity conditions elastic distortion rates along boundaries, which introduces renders nonlocal. Whereas do not predict any significant pattern, slanted shear bands spontaneously emerge throughout sample involving continuity, agreement experimental observations. Also data, banding delayed when axis shifts from trend enhanced thickness decreased, particularly loading direction.