底面および非底面すべり系の活動が六方晶金属の非法線性に及ぼす影響

抄録

The non-normality effect of polycrystalline pure magnesium is numerically investigated using the crystal plasticity approach. A homogenization-based finite element method is introduced to compute the macroscopic material behaviors with a crystalline scale structure. The intensity of the non-normality depends on the amplitude of the offset strain. It is clarified that the difficulty of switching the dominant slip system when the strain path changes plays an important role and is the principal mechanism behind the strong non-normality effect of hexagonal metal.