| About this Abstract |
| Meeting |
NUMISHEET 2022: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
|
| Symposium
|
NUMISHEET 2022
|
| Presentation Title |
A New Trial Stress for Newton's Iteration Based on Plastic Strain Rate Potential |
| Author(s) |
Seung-Yong Yang, Wei Tong |
| On-Site Speaker (Planned) |
Wei Tong |
| Abstract Scope |
It is known that Newton's iteration can be divergent for highly anisotropic yield functions with a large strain increment in finite element analysis of plastic deformation.
One of the reasons of the divergence is inaccurate estimation of the initial stress by elastic trial stress. The line search strategy can not completely remove the problem.
A new method to predict the trial stress by plastic strain rate potential was proposed in this work.
The new method was applied to Hill's quadratic yield function and Hershey-Hosford yield function. It was shown that the number of iterations can be reduced significantly for plane stress biaxial loading, and computation time can be saved for 3-dimensional finite element simulation. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |