Plastic Deformation Behavior of High Strength Steel Sheet under Non-Proportional Loading and its Modeling
This paper deals with experimental observations and modeling of plastic deformations of a high strength steel sheet (HSS sheet) under biaxial stress conditions. Using a cruciform specimen of a HSS sheet of 980MPa-TS, experiments of proportional and non-proportional loadings were performed. Numerical simulations for the biaxial stress-strain responses were conducted using a constitutive model of large-strain cyclic plasticity (Yoshida-Uemori model), and the results were compared to the experimental data. The results of numerical simulation show a good agreement with the experimental results, which is attributed to accurate modeling of the backstress evolution of the anisotropic yield surface.
N. Ohno and T. Uehara
T. Uemori et al., "Plastic Deformation Behavior of High Strength Steel Sheet under Non-Proportional Loading and its Modeling", Key Engineering Materials, Vols. 340-341, pp. 895-900, 2007