Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Numerical Analysis Model for Fatigue Life Prediction of Welded Structures

용접구조물의 피로수명예측을 위한 수치해석모델

  • Lee, Chi-Seung (Dept. of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Lee, Jae-Myung (Dept. of Naval Architecture and Ocean Engineering, Pusan National University)
  • 이치승 (부산대학교 공과대학 조선해양공학과) ;
  • 이제명 (부산대학교 공과대학 조선해양공학과)
  • Published : 2009.12.31
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Abstract

In this study, the numerical analysis model for fatigue life prediction of welded structures are presented. In order to evaluate the structural degradation of welded structures due to fatigue loading, continuum damage mechanics approach is applied. Damage evolution equation of welded structures under arbitrary fatigue loading is constructed as a unified plasticity-damage theory. Moreover, by integration of damage evolution equation regarding to stress amplitude and number of cycles, the simplified fatigue life prediction model is derived. The proposed model is compared with fatigue test results of T-joint welded structures to obtain its validation and usefulness. It is confirmed that the predicted fatigue life of T-joint welded structures are coincided well with the fatigue test results.

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References

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