Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Effect of Weld Residual Stress on Fatigue Analysis of Nozzle

노즐의 피로해석에 미치는 용접잔류응력의 영향

  • Kim, Sang-Chul (Dept. of Occupational Health & Safety Engineering, Semyung University) ;
  • Kim, Man-Won (Central Research Institute, KHNP)
  • 김상철 (세명대학교 공과대학 보건안전공학과) ;
  • 김만원 (한국수력원자력(주), 중앙연구원)
  • Received : 2013.11.09
  • Accepted : 2014.01.02
  • Published : 2014.02.28
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Abstract

Although the fatigue design curve of ASME Code has enough margin with respect to alternating stress and cycles, the welding residual stress(WRS) should be included in fatigue analysis. In this paper, WRS distribution in a nozzle with dissimilar metal weldment was obtained by finite element analysis and was added in fatigue analysis. The fatigue analysis was performed by following the ASME Code including thermal and stress analysis applying with postulated 30 transient conditions. The calculated results of a cumulative fatigue usage factors(CUF) were compared for the case of the models with or without WRS effects. The results showed that the CUF at weldment and heat affected zone was affected by the WRS.

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References

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