| 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 |
Analysis of Material Work Hardening and Fracture Strains for Sheet Metal Stamping Processes |
| Author(s) |
Sergey F Golovashchenko, Srecko Zdravkovic, Natalia Reinberg, Saeid Nasheralahkami, Weitian Zhou |
| On-Site Speaker (Planned) |
Natalia Reinberg |
| Abstract Scope |
Experimental study of sheet material flow curves was performed using combined methods of cold rolling for prestraining material to targeted strain and then tensile testing. Experimental studies revealed that aluminum alloys show tendency for flow curves saturation which substantially lowers sheet work hardening. Performed numerical simulations of cup drawing illustrated that this effect leads to earlier material wrinkling compared to power law approximation of the flow curve. Examples of numerical simulation with Autoform software comparing various cases of flow curve approximation will be provided.
Analysis of fracture strains was performed by combined gridding and paint spraying on the sheet surface. This approach enabled measurements of local strains in the area closely adjacent to fracture without having continuous access to this area by video camera. This approach was used for sheet hole expansion, sheared edge stretchability along straight cut, hemming, and self-piercing riveting for ultra high strength steels and aluminum alloys. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |