Element and crack geometry sensitivities of finite element analysis results of linear elastic stress intensity factor for surface cracked straight pipes

Dongil Ryu, Kyung Dong Bae, Jin Ho Je, Joong Hyok An, Yun Jae Kim, Tae Kwang Song, Yong Beum Kim

Research output: Contribution to journalArticle


This study provides the elastic stress intensity factors, K, for circumferential and longitudinal surface cracked straight pipes under single or combined loads of internal pressure, bending, and torsion based on three-dimensional (3D) finite element (FE) analyses. FE results are compared with two different types of defect assessment codes (API-579-1 and RCC-MR A16) to prove the accuracy of the FE results and the differences between the codes. Through the 3D FE analysis, it is found that the stress intensity factors are sensitive to the number of elements, which they were believed to not be sensitive to because of path independence. Differences were also found between the FE analysis results for crack defining methods and the results obtained by two different types of defect assessment codes.

Original languageEnglish
Pages (from-to)521-527
Number of pages7
JournalTransactions of the Korean Society of Mechanical Engineers, A
Issue number4
Publication statusPublished - 2013 Apr 1
Externally publishedYes



  • Finite element analysis
  • Straight pipe
  • Stress intensity factor
  • Surface crack

ASJC Scopus subject areas

  • Mechanical Engineering

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