応力増分依存性を考慮した弾塑性体構成方程式の-表現 : 第1報,Mises形塑性ポテンシャルを伴う初期等方材

抄録

A constitutive law for elastic-plastic materials is presented on the assumption that deviatoric stress increments affect plastic strain increments. By the use of weighing parameters, the law is expressed as an averaging rule of the usual plastic potential law (or flow rule) and a rule that permits plastic strain increments to depend only on stress increments. The developed law permits the existence of a vertex on the yield surface. The law, however, can be written formally in the same equation as the usual flow rule : this implies that the developed law is applicable to such a solution scheme as the Finite Element Method.