| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2020)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2020)
|
| Presentation Title |
A Study of Anisotropic Yield Function Based on J2 and J3 Invariants |
| Author(s) |
Young Suk Kim, Phu Van Nguyen, Jin Jae Kim |
| On-Site Speaker (Planned) |
Young Suk Kim |
| Abstract Scope |
In this paper a new anisotropic yield function that describes the elastoplastic behavior of sheet metals depends not only on the second stress invariant J2 for the yield, but also on the third stress invariant J3, both may affect the shape of the yield surface. The new anisotropic yield function is general and applicable to three-dimensional stress states. The proposed model is identified by calibration parameters from experimental data of material including uniaxial and biaxial tests. In this study, the predictive capabilities of the new anisotropic yield function are demonstrated by comparison between the predictions and experimental data for yield locus, normalized yield stress and r-value on aluminum sheet. The result indicates that the new anisotropic model is reasonable to predict the shape of the yield surface of the sheet metals. In addition, the effect of the proposed yield function on sheet metal formability evaluation was discussed. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |