Thermo-mechanical coupling finite element analysis of sheet metal extrusion process

Z. H. Chen, Chak Yin Tang, T. C. Lee

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

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 languageEnglish
Title of host publicationProceedings of the Conference on Computational Modeling of Materials, Minerals and Metals Processing
Pages595-604
Number of pages10
Publication statusPublished - 1 Dec 2001
EventProceedings of Conference on Computational Modeling of Materials, Minerals and Metals Processing - San Diego, CA, United States
Duration: 23 Sep 200126 Sep 2001

Conference

ConferenceProceedings of Conference on Computational Modeling of Materials, Minerals and Metals Processing
Country/TerritoryUnited States
CitySan Diego, CA
Period23/09/0126/09/01

ASJC Scopus subject areas

  • Engineering(all)

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