| 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 |
Calibration and Verification of Stress-strain Curve in High Strain Region of Mild Steel Sheet |
| Author(s) |
Hideo Tsutamori, Hiroaki Oonishi, Takeshi Nishiwaki |
| On-Site Speaker (Planned) |
Hideo Tsutamori |
| Abstract Scope |
Stress-strain curve in high strain region is one of the most important models that must be taken into consideration for high-precision sheet forming simulation. In this study, using mild steel sheets, tensile tests were conducted with a necked shape specimen at the center in order to generate non-uniform elongation. Using image analysis, strain-load relationships were obtained using multiple gauge lengths, and stress-strain relationships were obtained by inverse analysis using FE simulation. With sufficiently small gauge length it is possible to obtain stress-strain relationships in high strain region. The advantage of this method is that it can be implemented with a uniaxial tensile test machine only as experimental apparatus. For validation, original hole expansion test model is proposed, that is not affected by friction. The thickness strain distribution along the hole with large plastic strain is compared with experimental and numerical results to indicate validity of this method. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |