Abstract
In sheet metal forming process, the forming limit and strain distribution are governed by plastic instability and fracture following strain localization. It has been proved that the temperature gradient caused by plastic deformation as well as friction is one of the crucial factors to induce the strain localization in high-speed metal forming processes. In this paper, a numerical simulation of the sheet metal extrusion process has been conducted by using thermal-mechanical coupling finite element method. An improved mixed finite element method has been used to solve the large deformation elasto-plastic problem. In thermal phase, the transient heat transfer finite element method together with the Crank-Nicholson algorithm has been employed to determine the temperature field. Both the numerical results and the experimental observations reveal that the temperature gradient plays an important role in inducing the strain localization, which eventually leads to fracture failure in the sheet metal extrusion process.
| Original language | English |
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| Title of host publication | Proceedings of the Conference on Computational Modeling of Materials, Minerals and Metals Processing |
| Pages | 595-604 |
| Number of pages | 10 |
| Publication status | Published - 1 Dec 2001 |
| Event | Proceedings of Conference on Computational Modeling of Materials, Minerals and Metals Processing - San Diego, CA, United States Duration: 23 Sept 2001 → 26 Sept 2001 |
Conference
| Conference | Proceedings of Conference on Computational Modeling of Materials, Minerals and Metals Processing |
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| Country/Territory | United States |
| City | San Diego, CA |
| Period | 23/09/01 → 26/09/01 |
ASJC Scopus subject areas
- General Engineering