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

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
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Comparison of Stress Intensity Factors for Cylindrical Structure with Circumferential Through-Wall Cracks subjected to Tensile Load

원주방향 관통균열이 존재하는 원통형 구조물의 인장하중에 의한 응력확대계수 비교

  • 정달우 (한국전력기술(주)) ;
  • 오창균 (한국전력기술(주)) ;
  • 김현수 (한국전력기술(주)) ;
  • 권형도 (한국수력원자력(주) 중앙연구원) ;
  • 양준석 (한국수력원자력(주) 중앙연구원)
  • Received : 2021.11.12
  • Accepted : 2021.12.23
  • Published : 2021.12.31
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Abstract

To date, a number of stress intensity factor (SIF) solutions have been proposed for the cylindrical structure with circumferential through-wall cracks. However, each solution has a different format as well as applicable range. It is also known that there is a significant difference in predicted SIF values depending on the shape of the structure and the size of the crack. In this study, the applicability of various SIF solutions was analyzed by comparing the finite element analysis results for the case where a tensile load is applied to the cylindrical structure with circumferential through-wall crack. It is found that the calculated SIF gradually decreases and converges to a certain value with increasing length-to-radius ratio. Therefore, an appropriate length-to-radius ratio should be set in consideration of the dimensions of the actual cylindrical structure. For piping with sufficiently long cylinder, the ASME solution is found to be the most appropriate, and for a short cylinder, the API solution should be applied. On the other hand, the WEC solution requires careful attention to its application.

Keywords

References

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