In the present study, a viscoplastic self-consistent crystal plasticity model (VPSC-RGBV), whichaccounts for various microstructural features, including the accumulation and annihilation ofdislocations due to slip activity and latent hardening originated from interactions betweengliding dislocations on diﬀerent slip planes, is described. The simulation results of the VPSC-RGBV model are compared with those of a macro-mechanical distortional plasticity model, theso-called homogeneous anisotropic hardening (HAH), and experimental data pertaining to metalsundergoing complex loading histories. The diﬀerences between the simulated and experimentalresults under non-proportional loading, including 1) the stress-strain curve, 2) instantaneous r-value after strain-path change, and 3) yield surface evolution, are discussed. Finally, potentialimprovements are suggested for VPSC-RGBV model.
- Crystal plasticity
- Constitutive behavior
- Strain-path change
Kim, H., Barlat, F., Lee, Y., Zaman, S. B., Lee, C. S., & Jeong, Y. (2018). A crystal plasticity model for describing the anisotropic hardening behavior of steel sheets during strain-path changes. International journal of plasticity, 111, 85-106. https://doi.org/10.1016/j.ijplas.2018.07.010