Approximate J estimates for circumferential cracks in between elbows and attached pipes

Tae Kwang Song, Chang Kyun Oh, Yun-Jae Kim, Jong Sung Kim, Te Eun Jin

Research output: Contribution to journalArticle


The present work proposes a method for elastic-plastic fracture mechanics analysis of the circumferential through-wall crack in between elbows and attached straight pipes, subject to in-plane bending. Based on small strain finite element limit analyses, closed-form limit load solutions are given first. Then applicability of the reference stress based method to approximately estimate J is proposed. One interesting finding is that a popular approach to assume that the crack locates in the straight pipe could lead to significantly different assessment results.

Original languageEnglish
Pages (from-to)521-524
Number of pages4
JournalKey Engineering Materials
Volume345-346 I
Publication statusPublished - 2007 May 21



  • Circumferential through-wall crack
  • Elbow
  • Finite element analysis
  • J-integral
  • Reference stress method

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemical Engineering (miscellaneous)

Cite this