Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Prediction of Nuggest Shape by Finite Element Modeling in Arc-spot Welding

유한요소 모델링을 이용한 아크 스폿 용접의 너깃 형상 예측

  • 황종근 (한국원자력 연구소) ;
  • 장경복 (부산대학교 정밀기계공학과 대학원) ;
  • 김기순 (부산대학교 정밀기계공학과 대학원) ;
  • 강성수 (부산대학교 기계기술연구소)
  • Published : 1999.04.01
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Abstract

The shape of weld nuggest in arc spot welding of 304 stainless steel was found by searching thermal history of a weld joint through a three-dimensional finite element model. The problem consists of one in which the finite element mesh is growing continuously in time in order to accomodate metal transfer in arc spot welding using element rebirth technique. The analysis was performed on the basis of experimental results. The finite element program MARC, along with a few user subroutines, was employed to obtain the numerical results. Temperature-dependent thermal properties, stir effect in weld pool, effect of phase transformation, and the convective and radiative boundary conditions are included in the model. Numerically predicted shape of weld nuggest is compared with the experimentally observed shape.

Keywords

References

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