Reference stress based J and COD estimation of circumferential through-wall cracked elbows under in-plane bending

Chul Goo Kim, Kyung Dong Bae, Yun Jae Kim, Young Jin Oh, Peter J. Budden

Research output: Contribution to journalArticle

2 Citations (Scopus)


This paper proposes J-integral and crack opening displacement (COD) estimation equations based on the reference stress method for circumferential through-wall cracked elbows under in-plane bending. For best estimates of J and COD, an optimized reference load, used to define the reference stress, is given. The proposed equations are compared with detailed finite element results. They are further validated against eight published full-scale pipe test data. Comparison of crack initiation and maximum loads shows good agreement.

Original languageEnglish
Pages (from-to)303-317
Number of pages15
JournalEngineering Fracture Mechanics
Publication statusPublished - 2015 Jan 1
Externally publishedYes



  • Circumferential through-wall crack
  • Crack opening displacement
  • Elbow
  • Experimental validation
  • J-integral
  • Leak-before-break
  • Optimized reference load
  • Reference stress method

ASJC Scopus subject areas

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

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