Transactions of the Korean Society of Pressure Vessels and Piping (한국압력기기공학회 논문집)

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
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Prediction of Creep Stress in High Temperature Piping System Using Elastic Follow-up Factor

탄성추종계수를 이용한 고온 배관계의 크리프 응력 예측

  • 서준민 (고려대학교 (기계공학과)) ;
  • 윤교근 (고려대학교 (기계공학과)) ;
  • 이현재 (고려대학교 (기계공학과)) ;
  • 오영진 (한국전력기술 (미래전력기술연구소)) ;
  • 김윤재 (고려대학교 (기계공학과))
  • Received : 2018.04.23
  • Accepted : 2018.06.18
  • Published : 2018.06.30
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Abstract

When designing high temperature piping system, creep phenomena must be considered. Since ASME code does not provide detailed methods of design by rule (DBR) for high temperature piping, Finite element analysis should be performed. However, In the case of piping system with frequent design changes, creep analysis of the entire piping system for every change is ineffective and practically impossible. Therefore, based on elastic and elastic-plastic analysis, which takes a relatively short time, the creep stress is predicted by using elastic follow-up factor method provided in R5 code and plastic-creep analogy presented by Hoff. The predicted creep stress for a virtual piping system was compared with the creep analysis result and the two results showed similar stress relaxation tendency in time.

Keywords

References

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