Efficient Integration in the Plasticity of Crystals with Pencil Glide and Deck Glide

Abstract

A stress update algorithm is proposed based on an approximate additive decomposition of the elastic predictor strain. It yields acceptable results even if the strain increments are an order of magnitude larger than the elastic strains. Moreover, it is shown that, in the context of the models of pencil glide and deck glide, at most four nonlinear equations for the computation of the unknown increments of plastic shear are needed in the case of b.c.c. and f.c.c. crystals.