|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Coefficients Optimization with Load Cycles for New Homogeneous Anisotropic Hardening Model (HAH20)
||Shin-Yeong Lee, Jin-Hwan Kim, Frédéric Barlat
|On-Site Speaker (Planned)
In this study, the homogeneous anisotropic hardening model (HAH), specially developed to describe strain-path-change effects, was recently updated with a number of new features including a more accurate description of permanent softening. Accordingly, the coefficient identification was updated for this improved model, so-called HAH20, but a validation of the procedure is necessary. For this purpose, a DP780 advanced high strength steel (AHSS) sheet sample is used in this work to validate the reverse-loading behavior in tension-compression and shear cycle tests. Single and multiple reversal stress-strain curves are carried out. The five HAH20 reverse loading coefficients are optimized by reducing the difference between the simulated and experimental flow curves using hybrid optimization algorithms. The hydrostatic pressure influence on plastic flow and the elastic chord modulus degradation are also considered in the calibration of the coefficients. The best experimental procedure and the most efficient optimization methodology are discussed in this study.
||Definite: At-meeting proceedings