대한기계학회:학술대회논문집 (Proceedings of the KSME Conference)

대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

국부변형률근사법을 이용한 차체 점용접부의 피로수명 예측에 관한 연구

A Study of Fatigue Life Prediction for Automotive Spot Weldment using Local Strain Approach

  • 이송인 (전북대학교 기계공학부 자동차신기술연구소) ;
  • 나성훈 (전북대학교 정밀기계공학과 대학원) ;
  • 나의균 (군산대학교 기계공학부) ;
  • 유효선 (전북대학교 기계공학부 자동차신기술연구소)
  • 발행 : 2000.04.20
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초록

The fatigue crack initiation life is studied on automotive spot weldment made from cold rolled carbon steel(SPC) sheet by using DCPDM and local strain approach. It can be found that the fatigue crack initiation behavior in spot weldment can be definitely detected by DCPDM system. The local stresses and strains are estimated by elastic-plastic FEM analysis and the alternative approximate method based on Neuber's rule were applied to predict the fatigue life of spot weldment. A satisfactory correlation between the predicted life and experimental life can be found in spot weldment within a factor of 4.

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