複合階層塑性変形モデルに基づく二軸ラチェット変形の解析(<小特集>:非弾性挙動の力学)

概要

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In this paper the authors intend to expand the multiple strata plasticity model for describing various cyclie plastic deformations. Recently, some applications of the previous model have suggested that any plastic deformations can be described as the macroscopic behaviors caused by the activation state of the slip systems in a polycrystalline metal. An effect of back stress acting on the dislocation source on a slip plane is introduced in order to consider a reciprocating motion of slip system. A new modified model has been proposed by adopting a simple rule expressing formation and disappearance of back stress under cyclic loading. It has been clarified that each biaxial ratchetting behavior can be explained as a cyclic deformation caused by an activation state of the slip systems under nonproportional loading
2000-03-25