多軸応力下におけるひずみ履歴およびひずみ速度履歴に関する検討 : 第1報,純銅・純チタニウムに関する検討

To estimate the influence of the strain history and the strain rate history on the subsequent loading simultaneously, the strain rate jump tests under the combined loading condition were carried out for copper and pure titanium. The obtained equi-equivalent plastic strain surface of both metals is carefully examined, then, the constitutive equations which include both the effect of the strain history and the strain rate history are proposed. Comparison of the numerical simulations with the corresponding experimental results is performed for the verfication of the proposed model.