ひずみ幅変動下および引張変形経路途中からの銅の繰返し変形挙動の結晶塑性的数値シミュレーション

抄録

The cyclic stress-strain response of copper under conditions where tensile deformation was followed by cyclic deformation and the change in strain range occurred during cyclic deformation was estimated, extending the analysis proposed by authors in the earlier paper. At that time it was assumed that copper had dislocation density inherent in the controlled strain range at the stable stage in the cyclic deformation process, independent of the strain history which copper was subjected to. The cyclic softening occurring in copper cyclically deformed following the tensile deformation was successfully described through the present analysis. Moreover, the cyclic softening and hardening behaviors induced by the change in strain range controlled in the cyclic deformation test were also satisfactorily calculated through the proposed method.