Abstract
Accurate prediction of forming limits is critical to process planning and part design. It has been found in literature that forming limit curves (FLC) generated from incremental forming (IF) processes greatly exceed the traditional forming limit curves obtained from sheet metal stamping. In this paper, a ductile fracture criterion is introduced in an effort to predict the forming limit in an incremental forming process. Based on calculated stress/strain values from the finite element simulation, the fracture initiation site and the maximum forming height of a conical cup are predicted using the ductile fracture criterion. The numerical results are compared with our experimental results and the strain-based forming limits found in literature. It is concluded that the approach has some merits, however, is not entirely satisfactory. Discussions on the causes of the discrepancy are provided.
| Original language | English (US) |
|---|---|
| Title of host publication | Transactions of the North American Manufacturing Research Institution of SME - Paper Presented at NAMRC 36 |
| Pages | 389-396 |
| Number of pages | 8 |
| Volume | 36 |
| State | Published - Oct 2 2008 |
| Event | Transactions of the North American Manufacturing Research Institution of SME - Monterrey, Mexico Duration: May 20 2008 → May 23 2008 |
Other
| Other | Transactions of the North American Manufacturing Research Institution of SME |
|---|---|
| Country/Territory | Mexico |
| City | Monterrey |
| Period | 5/20/08 → 5/23/08 |
Keywords
- Forming limit
- Fracture criterion
- Single point incremental forming (SPIF)
ASJC Scopus subject areas
- Mechanical Engineering
- Industrial and Manufacturing Engineering