速度形剛塑性有限要素法の提案

概要

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The rigid plastic finite element method is frequently used to predict the deformation behaviour of the materials during the forming processes. The constitutive equation employed is usually restricted to flow type one so that the normality of the strain rate to the yield surface is entailed. Then the deformation can not follow the abrupt change in stress history. This often yields the over stabilization of the deformation. In this paper, to overcome this situation, a rate type constitutive equation with a one-to-one relation between stress rate and strain rate is employed, and the formulation of the rigid plastic finite element method is presented. The method is applied to the prediction of the flow localization of the strip under tension. The feature of the present results is clarified by comparing the results with those due to J2 flow and corner theory.
一般社団法人日本機械学会の論文
1988-03-25