|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Anisotropic Failure Characterization and Modeling of Advanced High Strength Steels
||Jun Hu, Hao Pan, Yuanli Bai, Erik J. Pavlina
|On-Site Speaker (Planned)
New generations of advanced high strength steels (AHSSs) possess improved strain hardening behavior and resistance to necking that are favorable for automotive body applications. Yet the multiphase microstructure that is responsible for this merit causes complex orientation-dependent straining plasticity and failure behavior in these steels. In this work, we started from conducting a series of experiments to demonstrate different failure morphology of various AHSSs, in order to highlight the importance and necessity of using anisotropic failure models. Then we calibrated a stress-based and a strain-based anisotropic failure models respectively based on the same coupon-level experimental results. Subsequently, with the same plasticity model, the two failure models were implemented into finite element simulations of various sub-assembly level experiments of sophisticated loading conditions. Eventually, the failure predictions based on the two models were evaluated by the experimental measurements and compared with each other to reveal their highlights, limitations, and potential improvements.
||Definite: At-meeting proceedings