Design of Spot Weld Based on the Durability Influence Index and the DOE Analysis

점용접부 내구 영향도 지수와 실험 계획법을 이용한 자동차 부품 점용접 설계

  • 최누리 (한국과학기술원 기계공학과) ;
  • 주병현 (한국과학기술원 기계공학과) ;
  • 박정민 (한국과학기술원 기계공학과) ;
  • 엄재성 (한국과학기술원 기계공학과) ;
  • 변형배 (GM 대우자동차) ;
  • 김동석 (GM 대우자동차) ;
  • 이병채 (한국과학기술원 기계공학과)
  • Published : 2006.09.01


A practical method for reducing the number of spot welds in automotive structures considering fatigue crack initiation life is suggested. At first, an influence index for the durability and the fatigue life of a spot weld itself is defined and then taken as the main effect of the DOE analysis. Spot welds that can be removed without serious reduction of durability through numerical experiments are selected by the results of DOE. The proposed method was applied to the shock tower and LCA(lower control arm) structure of a vehicle, which are important components in durability-related point of view.


Spot Weld;Durability;Fatigue Life;Influence Index;DOE


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