A NEW YIELD CRITERION FOR ORTHOTROPIC SHEET METALS UNDER PLANE-STRESS CONDITIONS

Abstract

The paper presents a new yield criterion for orthotropic sheet metals under plane-stress conditions. The criterion is derived from the one proposed by Barlat and Lian in 1989. Two additional coefficients have been introduced in order to allow a better representation of the plastic behaviour of the orthotropic sheet metals. The predictio ns of the new yield criterion are compared with the experimental data for two materials.