| About this Abstract |
| Meeting |
NUMISHEET 2022: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
|
| Symposium
|
NUMISHEET 2022
|
| Presentation Title |
Modeling the Influence of Hydrostatic Stress on Plastic Behavior of Advanced High Strength Steels |
| Author(s) |
Frederic Barlat, Seong-Yong Yoon, Shin-Yeong Lee, Ji-Min Kim, Jin-Hwan Kim |
| On-Site Speaker (Planned) |
Frederic Barlat |
| Abstract Scope |
It has been observed that, in high strength metals, the compression flow stress is higher than the tension flow stress, a phenomenon coined strength differential (S–D) effect. Although different theories were advanced to explain these observations, it was demonstrated in the late 1970’s early 1980’s that the influence of the hydrostatic stress on the plastic behavior was responsible for the S–D effect. In classical theory of plasticity for metals, it is assumed that pressure has no effect on yielding and plastic flow properties. However, this is only an approximation in which the S–D effect is neglected. In this presentation, the critical experiments as well as the relevant models at different scales explaining the influence of pressure on plasticity are reviewed. This work was adopted for the modeling of advanced high strength steel (AHSS) and a few examples are presented to illustrate the concept. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |