A Yield Function for Orthotropic Sheets under Plane Stress Conditions

ABSTRACT A yield function that describes the behavior of orthotropic sheets exhibiting planar anisotropy and subjected to plane stress conditions is proposed. This criterion gives yield surface shapes in a three-dimensional space (two normal stresses and one shear stress) in rather good agreement with the ones based on polycrystal modeling. Some examples are given to illustrate the necessity of such formulation.