Yield locus for circumferential part-through surface cracked pipes under combined pressure and bending

Chang Kyun Oh, Yun Jae Kim, Jong Sung Kim, Tae Eun Jin

Research output: Contribution to journalArticle

7 Citations (Scopus)


This paper provides analytical plastic limit load solutions of pipes with circumferential part-through surface cracks under combined pressure and bending. A key issue is to postulate discontinuous hoop stress distributions in the net-section. General equations for arbitrary-shaped cracks are derived and closed-form solutions are given for two idealized cracks; a constant depth crack and circular crack. Validity of the proposed limit load solutions are checked against the results from three-dimensional (3D) finite element (FE) limit analyses using elastic-perfectly plastic material behaviour.

Original languageEnglish
Pages (from-to)2175-2190
Number of pages16
JournalEngineering Fracture Mechanics
Issue number8
Publication statusPublished - 2008 May 1
Externally publishedYes



  • Circumferential part-through surface crack
  • Combined pressure and bending
  • FE limit analysis
  • Limit load
  • Local wall thinning

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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