FTMP場の理論に基づくMgのモデル化と3D変形解析

抄録

FTMP-based model for deformation twin, implemented in crystal plasticity based FEM is extended to 3D conditions, where more realistic boundary conditions are introduced. Demonstrated are the more comprehensive descriptive capabilities for reproducing the stress-strain responses based on a single set of material parameters. Not only mesh dependency but also those of model size and dimensions are systematically examined, where relatively large size/dimension dependencies as well as slight mesh dependency, which is absent in the 2D counterparts, are observed in 3D. These rather complex-looking dependencies are shown to be roughly explained by considering intimate interactions between slip and twin degrees of freedom in the present model, by focusing particularly on the activity/inactivity of the “prismatic slip” system.