Parameter identification of advanced plastic strain rate potentials and impact on plastic anisotropy prediction

Abstract

In the work presented in this paper, several strain rate potentials are examined in order to analyze their ability to model the initial stress and strain anisotropy of several orthotropic sheet materials. Classical quadratic and more advanced non-quadratic strain rate potentials are investigated in the case of FCC and BCC polycrystals. Different identifications procedures are proposed, which are taking into account the crystallographic texture and/or a set of mechanical test data in the determination of the material parameters. (C) 2008 Elsevier Ltd. All rights reserved.