| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
|
| Presentation Title |
Modeling Anisotropic Plasticity Under Complex Loading Conditions: Effects of Loading Path Changes on Flow Stress, Springback and Formability of Sheet Metals |
| Author(s) |
Myoung-Gyu Lee, Hongjin Choi, Jinwoo Lee, Hyuk Jong Bong |
| On-Site Speaker (Planned) |
Myoung-Gyu Lee |
| Abstract Scope |
Sheet metals often exhibit complex mechanical responses, which include anisotropy, path dependent flow stress, and strength differential. For example, advanced high strength steels (AHSS) show significant anisotropic hardening under load reversals, and Mg alloys present strong strength differentials between tension and compression. Therefore, accurate constitutive models and numerical technique are required to improve the fidelity of forming simulations employed during process designs. In this presentation, recent efforts on developing new distortional plasticity based anisotropic hardening models and identifying their model parameters are introduced. The constitutive models predict the flow stress evolutions under different loading histories such as Bauschinger effect and stress overshooting under load reversal and cross loading, respectively, and the strength differentials in Mg alloys under tension and compression. For validations, predicted springback of AHSS and Mg alloy sheets, and flow stresses after multi-stage loading of rather thick steel sheets are compared with corresponding experimental data. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |