A distortional hardening model for finite plasticity

Plastic anisotropy may strongly affect the stress and strain response in metals subjected to multiaxial cyclic loading. This evolves due various microstructural features. We first use simple models study how such features result evolving plastic anisotropy. A subsequent analysis of existing distortional hardening highlights difference between stress- strain-driven models. Following this analysis, we conclude that stress-driven approach is most suitable propose an improved model. It thermodynamically consistent guarantees yield surface convexity. Many literature do not fulfill latter. In contrast, model proposed work has a convex independent its parameter values. Experimental results, considering evolution after large shear strains, are used assess model’s performance. carefully analyze experiments finite setting, showing numerical results can be compared with experimental results. The new fits significantly better than predecessor without introducing additional material parameters.