|About this Abstract
|NUMISHEET 2022: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
|Investigating the Formability and Failure Mechanism of an Advanced High Strength Steel by a Microstructure Based Hierarchy Modeling Approach
|Haiming Zhang, Shuai Luo, Jiaru Liu, Zhenshan Cui
|On-Site Speaker (Planned)
A reliable prediction of sheet formability is especially necessary for designing the lightweight components made of advanced high strength steels (AHSSs) with complex microstructure. In this work, a hierarchy modeling approach based on FEM and crystal plasticity (CP) was proposed to investigate the deformation and failure of a hot-rolled AHSS subjected to hole expansion (HE) operations. At the engineering scale, the HE simulation was first performed by a commercial FEM software. The deformation history of critical elements was used as the boundary conditions for grain-level CP simulations. Microstructural data including phase morphology, grain size, and orientation obtained from EBSD characterizations were used to build high-fidelity representative volume elements for the CP simulations. The simulated results were compared with high-resolution SEM data in terms of damage initiation sites. Plasticity heterogeneities and micromechanical interactions predicted by the hierarchy modeling sheds light on understanding the failure mechanism of AHSSs under complex deformation paths.
|Definite: At-meeting proceedings