• 제목/요약/키워드: PGSFR, Elastic follow-up factor

검색결과 1건 처리시간 0.013초

탄성추종계수를 이용한 고온 배관계의 크리프 응력 예측 (Prediction of Creep Stress in High Temperature Piping System Using Elastic Follow-up Factor)

  • 서준민;윤교근;이현재;오영진;김윤재
    • 한국압력기기공학회 논문집
    • /
    • 제14권1호
    • /
    • pp.32-37
    • /
    • 2018
  • 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.