| About this Abstract |
| Meeting |
NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
|
| Symposium
|
NUMISHEET 2021
|
| Presentation Title |
Effect of Width/Thickness Effect of Sheet Metals on Bendability |
| Author(s) |
Mohammadmehdi Shahzamanian Sichani, David Lloyd, Peidong Wu |
| On-Site Speaker (Planned) |
Mohammadmehdi Shahzamanian Sichani |
| Abstract Scope |
The effect of width/thickness ratio on the bendability of sheet metal is investigated using the finite element method (FEM) employing the Gurson-Tvergaard-Needleman (GTN) model. Strain path changes in the sheet with change in width/thickness ratio. It is shown that bendability and fracture strain increase significantly by decrease of width/thickness ratio. The stress state is almost uniaxial when stress ratio (α) is close to zero for narrow sheets. This matter delays the growth and coalescence of microvoids as the volumetric strain and stress triaxiality decrease. On the other hand, ductility decreases with increase of α for wider sheets. Fracture bending strain is calculated and as expected it increases with decrease of width/thickness ratio. Numerical results are found to be in good agreement with experimental observations. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |