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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Analysis of Failure Phenomena in Uni-axial Tension Tests of Friction Stir Welded AA6111-T4, AA5083-H18 and DP-Steel

마찰교반용접(FSW) 된 알루미늄 합금(AA6111-T4, AA5083-H18) 및 DP강 판재의 인장 실험시 파단 현상 해석

  • Park, S. ;
  • Um, K. ;
  • Ma, N. ;
  • Ahn, K. ;
  • Chung, K.H. ;
  • Kim, Chong-Min ;
  • Okamoto, Kazutaka (General Motors R&D Center) ;
  • Wagoner, R.H. (Hitachi America Ltd.) ;
  • Chung, K. (Ohio State University)
  • 박상준 (서울대학교 재료공학부) ;
  • 엄기문 ((주)르노 삼성 자동차 연구소) ;
  • 마닝 (서울대학교 재료공학부) ;
  • 안강환 (서울대학교 재료공학부) ;
  • 정경환 (서울대학교 재료공학부) ;
  • ;
  • ;
  • ;
  • 정관수 (서울대학교 재료공학부)
  • Published : 2007.05.10
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Abstract

Failure phenomena in uni-axial tension test were experimentally and numerically investigated for AA6111-T4, AA5083-H18 and DP-Steel, which were friction-stir welded with the same and different thicknesses. Forming limit diagram(FLD) was measured using hemispherical dome stretching tests for base materials and also predicted by Hill's bifurcation and M-K theories for welded areas. Finite element simulations well predicted hardening behaviors, failure locations as well as failure patterns for the uni-axial tension tests especially utilizing very fine meshes and FLD along with stress softening.

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