A new procedure for drawing forming limit curves is suggested. The theoretical basis for computing the forming limit curve due to diffuse necking, for nonlinear strain paths, is derived. The theoretically determined forming limit curve is compared with experimentally determined forming limits for both linear and bilinear strain paths. Reasonable agreement is observed. The procedure can also be utilized for nonlinear strain paths in general.
|Journal||Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications|
|Number of pages||8|
|Publication status||Published - 2019|
- Sheet metal forming
- Formability diagram
- Necking instability
- Nonlinear strain path