| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Material Behavior Characterization via Multi-Directional Deformation of Sheet Metal
|
| Presentation Title |
A Novel Anisotropic Continuum Damage Evolution Model Coupled with Anisotropic Hardening under Non-proportional Deformation Paths |
| Author(s) |
Seonghwan Choi, Soo-Chang Kang, Myoung-Gyu Lee |
| On-Site Speaker (Planned) |
Seonghwan Choi |
| Abstract Scope |
A new continuum damage model coupled with anisotropic hardening model is developed. In the continuum damage mechanics (CDM) scheme, micro voids and cracks in materials reduce actual load-carrying area, and the damage variable can be obtained by the ratio between reduced and apparent area. To be applied for characterizing complex post-necking behavior after non-proportional deformation, a new anisotropic damage evolution law coupled with homogeneous anisotropic hardening based on distortional yield surface (HAH) is proposed. In the coupled constitutive model, the damage evolution is derived from anisotropic dissipation potential function which provides the stress coupled anisotropic damage evolution. The model is implemented to the finite element software ABAQUS with a semi-explicit stress integration scheme. For the verification of the proposed model, tensile tests for pre-strained notched specimens with various specimen geometries are conducted. The predicted load-displacements give good agreements with the experimental results. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Computational Materials Science & Engineering, Modeling and Simulation |