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

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
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Proposal of a Simulated Test Method for the Evaluation of Deformation and Failure Characteristics of Pipe Elbows under Cyclic Loads

반복하중 하의 엘보우 변형 및 손상 특성 평가를 위한 모사시험 방법 제안

  • 김진원 (조선대학교 원자력공학과) ;
  • 이대영 (한국전력기술(주) 미래전력기술연구소) ;
  • 박흥배 (한국전력기술(주) 미래전력기술연구소)
  • Received : 2020.01.06
  • Accepted : 2020.02.26
  • Published : 2020.06.30
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Abstract

This study proposed a simulated test method using ring specimen to evaluate the deformation and failure characteristics of pipe elbows under a large amplitude cyclic load. The validity of the test method was demonstrated by finite element (FE) analysis of pipe elbow and ring specimen under cyclic loads. The results showed that the proposed test method adequately simulates the distribution of circumferential strain at crown of pipe elbows where cracks occur under cyclic loads and presents the cyclic hardening behavior of pipe elbows. The parametric FE analysis showed that consistent simulated test results could be obtained when the test section of the ring specimen is longer than 1/2 of the inner diameter of the ring specimen and the radius of the inner loading jig is less than 1/4 of the inner diameter of the specimen.

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References

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