Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Comparison of Springback Modes in the Stamping Process of an S-rail with HSS according to the Hardening Model

경화모델에 따른 고강도강판 S-rail 성형공정에서의 스프링백 모드 비교

  • Choi, B.H. (Department of Mechanical Engineering, Graduate School, Daegu University) ;
  • Lee, J.W. (GIFT, POSTECH) ;
  • Kim, S.H. (School of Mechanical and Automotive Engineering, Daegu University) ;
  • Lee, M.G. (GIFT, POSTECH) ;
  • Kim, H.K. (Department of Automotive Engineering, Kookmin University)
  • Received : 2012.12.18
  • Accepted : 2013.01.23
  • Published : 2013.02.01
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Abstract

In this study, springback amounts of an S-rail are quantitatively compared according to the hardening model using a finite element simulation for the stamping process with high strength steels. For comparison of the hardening models, two types of hardening models were investigated. The two models were isotropic hardening and kinematic hardening. For the analysis with kinematic hardening, the Yoshida-Uemori model was selected. Five kinds of springback modes were measured at designated sections and a comparison was made between the experiment and the analyses with two types of hardening models. The analysis results show that the springback in the flange and the wall curl are predicted more accurately with a kinematic hardening model.

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References

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