Analysis of large-strain shear in rate dependent face-centred cubic polycrystals: correlation of micro- and macromechanics

摘要: Micro- and macroscopic aspects of large-strain deformation are examined through analyses shear by using physical phenomenological models. Past experiments first reviewed to reveal current issues put the present work in perspective. These addressed a complete set simulations with finite-strain, rate-dependent polycrystal model. The model is based on rigorous constitutive theory for crystallographic slip that accounts development texture effects response. influences strain hardening, latent strain-rate sensitivity, boundary constraints, initial textures evolution response studied. Coupled stress such as axial elongation during unconstrained normal stresses constrained related material properties, constraint texture. formation ideal their role determining polycrystalline behaviour discussed quantitative terms. Large-strain also studied several theories including J 2 -flow theory, -corner two versions finite-strain kinematic hardening theory. behaviours predicted these physically directly compared. A noteworthy outcome close correspondence found between predictions those micromechanically