| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
Stress-based Ductile Fracture Criterion for Nonlinear Strain Paths with Model Calibration |
| Author(s) |
Jeong Whan Yoon |
| On-Site Speaker (Planned) |
Jeong Whan Yoon |
| Abstract Scope |
A shear specimen is optimized by minimizing the variation of stress triaxiality in the shear zone. In the optimization, Hill48 and Yld2000-2d (Barlat et al., 2003) criteria and Hill48 with non-associated flow rule are employed to model the anisotropic deformation. Isotropic fracture behavior is modeled by both linear model and nonlinear model considering different triaxiality conditions. It is observed that the mean stress model shows significant difference in the compression area compared to Mohr Coulomb-based normal stress model and a new isotropic model with the mean stress term shows a good correlation for AA 6k21. The criterion is applied for drawing, redrawing and expansion for a beverage can which has complex nonlinear strain paths. Effect of kinematic hardening on fracture is also investigated. It has been shown that the proposed stress-based fracture model predicts the failure stroke accurately. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |