非比例負荷に対する繰返し塑性構成式の定式化 : 第1報, 基礎概念の定式化と基礎式の展開

概要

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A new constitutive model of cyclic plasticity in non-proportional loading conditions is developed on the basis of previous experimental results by the present authors. Namely, by examining the characteristic features of the cyclic hardening elucidated in previous paper, the notions of a perfect non-hardening region and a proportional non-hardening region are first introduced. In the former region, neither proportional nor non-proportional loading brings about any isotropic hardening ; whereas no isotropic hardening is induced by any proportional loading in the latter region. In view of the experimental results, we further assumed that the cyclic-hardening caused by arbitrary strain paths can be described by a single scalar isotropic hardening variable. Finally, a relevant constitutive equation is formulated by incorporating these notions into Krieg's two-surface plasticity model. The methods of the determination of the material functions and the material constants as well as the comparison of the theory with the corresponding experiments will be reported in the succeeding paper.
一般社団法人日本機械学会の論文
1986-08-25