Abstract
In order to design and optimize a sheet metal forming process, the precise prediction of forming limits of sheet materials is needed. The purpose of this work is to predict theoretically the forming limit diagrams (FLD) of voided anisotropic sheets under the scheme of Marciniak and Kuczynski (M-K) model. The analysis employs the Gurson's yield function for voided sheet metals in conjunction with Barlat and Lian's 1989 anisotropic yield criterion. The effect of strain gradient dependent yield criterion introducing a strain gradient term in flow stress is incorporated. To confirm the validity of the proposed M-K model, the predicted FLD was compared with experimental results of steel sheets. It was found that the predictions of forming limits for voided sheets were in good agreement with the experimental data.
Original language | English |
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Pages (from-to) | 395-400 |
Number of pages | 6 |
Journal | Key Engineering Materials |
Volume | 233-236 |
Issue number | I |
State | Published - 2002 |
Event | Proceedings of the 6th Asia-Pacific Symposium on Engineering Plasticity and Its Applications (AEPA2002) - Sydney, NSW, Australia Duration: 2 Dec 2002 → 6 Dec 2002 |
Keywords
- Forming limit diagrams FLD
- Marciniak-Kuczynski (M-K) model