|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Comparison of Non-associated Fourth-order and Associated Sixth-order Anisotropic Plasticity Models in Sheet Metal Forming Simulations
||Seung-Yong Yang, Wei Tong
|On-Site Speaker (Planned)
Gotoh's fourth-order polynomial anisotropic plasticity model of sheet metals was extended by adopting a non-associated flow rule using a separate fourth-order polynomial flow potential for modeling an AHSS steel sheet and an aluminum sheet. The non-associated Gotoh's anisotropic plasticity model can has up to 17 independent material parameters, where 9 of them in terms of yield stresses and 8 of them in terms of plastic strain ratios under both uniaxial and biaxial tension conditions. The non-associated Gotoh's model was used in simulating some selected sheet metal forming problems. In comparison, the same sheet metal forming problems were also analyzed using a sixth-order polynomial anisotropic plasticity model of the steel and aluminum sheets (where the yield stress function has up to 16 independent material parameters). The similarities and differences of the modeling capabilities and the simulation results were compared between of the non-associated and associated anisotropic plasticity models.
||Definite: At-meeting proceedings