Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
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Springback prediction of friction stir welded DP590 steel sheets considering permanent softening behavior

영구 연화 거동을 고려한 마찰교반용접(FSW) 된 DP강 판재의 탄성 복원 예측

  • Park, T. ;
  • Lee, W. ;
  • Chung, K.H. ;
  • Kim, J.H. ;
  • Kim, D. ;
  • Kim, Chong-Min (General Motors R&D Center) ;
  • Okamoto, Kazutaka (Hitachi America LTd.) ;
  • Wagoner, R.H. (Ohio State University) ;
  • Chung, K.
  • 박태준 (서울대학교 재료공학부) ;
  • 이원오 (한국기계연구원 부설 재료연구소) ;
  • 정경환 (포스코 기술연구소) ;
  • 김준형 (삼성전자 정보통신총괄) ;
  • 김대용 (한국기계연구원 부설 재료연구소) ;
  • ;
  • ;
  • ;
  • 정관수 (서울대학교)
  • Published : 2008.10.09
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Abstract

In order to evaluate the effect of permanent softening behavior on springback prediction, 2D-draw bending simulations were compared with experiments for friction stir welded DP590 steel sheets. To account fur the nonlinear hardening behavior, the combined isotropic-kinematic hardening law was utilized with and without considering the permanent softening behavior during reverse loading. Also, the non-quadratic orthotropic yield function, Yld2000-2d, was used to describe the anisotropic initial-yielding behavior of the base sheet while anisotropic properties of the weld zone were ignored for simplicity.

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