Net-section limit load approach for failure strength estimates of pipes with local wall thinning

Yun Jae Kim, Chang Kyun Oh, Chi Yong Park, Kunio Hasegawa

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The net-section limit load approach is typically used in assessment of pipes with local wall thinning, based on which a maximum load carrying capacity is easily estimated from one equation that includes two terms associated with the effect of the defect geometry and the material's resistance (strength). To better understand the applicability of the net-section limit load approach to pipes with local wall thinning, four different limit load expressions for pipes with local wall thinning under pure bending are considered, together with two different definitions of the material's resistance. Estimated failure moments are then compared with full-scale pipe test data. It is found that the use of an appropriate limit load solution reduces not only the degree of conservatism but also the dependence of the assessment results on the wall thinning geometry, and thus gives the best results. Therefore, finding such solutions for pipes with local wall thinning is an important issue.

Original languageEnglish
Pages (from-to)546-555
Number of pages10
JournalInternational Journal of Pressure Vessels and Piping
Volume83
Issue number7
DOIs
Publication statusPublished - 2006 Jul 1
Externally publishedYes

Keywords

  • FE limit analysis
  • Limit load
  • Local wall thinning

ASJC Scopus subject areas

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

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