Approximate J estimates for circumferential cracked pipes under primary and secondary stresses

Tae Kwang Song, Yun Jae Kim, Kamran Nikbin, Robert A. Ainsworth

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

This paper presents finite element solutions for elastic-plastic J for circumferentially cracked pipes under combined mechanical and thermal loads in terms of the V/Vo factor used within the failure assessment diagram approach. Systematic analyses suggest that the two major variables affecting V/Vo are the relative magnitude of the secondary stress and the primary load magnitude. It has been found that the variations with these parameters obtained from the FE results agree well with current R6 predictions for modest thermal loads and low primary loads. For larger thermal stresses, the R6 predictions are overly conservative and more accurate predictions are suggested.

Original languageEnglish
Pages (from-to)2109-2125
Number of pages17
JournalEngineering Fracture Mechanics
Volume76
Issue number13
DOIs
Publication statusPublished - 2009 Sep 1
Externally publishedYes

Keywords

  • Combined primary and secondary stresses
  • Finite element analysis
  • J-integral
  • Reference stress

ASJC Scopus subject areas

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

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