This paper presents a user-friendly function under non-associate flow rule to capture
anisotropic hardening (or evolution of yield surface) and the curvature of yield loci for body …

An anisotropic distortional hardening (ADH) model is developed under non-associated flow
rule by evolving the analytical asymmetric Yoon2014 yield criterion (Hu and Yoon, 2021) …

An accurate description of the material yielding behavior is of great importance for a
trustworthy prediction of complicated forming processes via numerical analysis. For metal …

This paper proposes a simple coupling of quadratic and non-quadratic yield functions with a
non-associated flow rule to describe the evolution of yield surface (or anisotropic …

A simple analytical form for yield surface distortion under non-associated flow rule is
developed from the expression of the transformed second and third deviatoric stress …

A fourth order polynomial yield criterion (Poly4) and a non-quadratic yield function are
coupled under associated flow rule to describe the evolution of anisotropic yielding behavior …

Yield surfaces evolve depending on loading directions (anisotropic hardening) and stress
states (differential hardening) during plastic deformation of sheet metals. A new analytical …

An accurate description of yield surface is essential for the high-fidelity numerical analyses
of sheet metal forming processes. In this work, a simple coupling of anisotropic quadratic …

Conventional isotropic hardening models constrain the shape of the yield function to remain
fixed throughout plastic deformation. However, experiments show that hardening is only …

Except for the Bauschinger effect and permanent softening, work hardening stagnation and
cross-effect are often observed deformation behaviors for sheet metals subjected to strain …