温度変動下の塑性構成式 : 限界曲面に基づく定式化および多曲面モデルへの変換

概要

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To develop a nonisothermal constitutive model of plasticity, we postulate a similarity equation which specifies the positional change of a kinematic hardening variable relative to the bounding surface under temperature variation. It results in a temperature-change induced term in the evolution equation of the kinematic hardening variable. On the assumption that the kinematic hardening variable consists of components, the proposed model is transformed to an equivalent form based on nesting multisurfaces. Discussing the condition for the temperature-history independence of plastic stress response, which is observed rather often in experiments, we derive analytical expressions of stress vs. strain relations under monotonic and cyclic thermomechanical loading. Relations between the present and previous models are also discussed.
一般社団法人日本機械学会の論文
1990-03-25