Analysis of plastic deformation and Taylor slips in FCC polycrystals by rigid-plastic finite element method.

Abstract

Taylor's slip model is incorporated with the rigid-plastic finite element analysis based on the upper bound theorem. Five independent slip systems are assumed to operate in each grain and the principle of the maximum plastic work proposed by Bishop and Hill is used to select the five operating slip systems out of twelve slip systems in fcc crystals. For the numerical calculation, a simple plane model of polycrystals is adopted which is composed of rectangular grains. Discussions are made on the characteristic feature of the plastic deformation of polycrystals.