Closed-form plastic collapse loads of pipe bends under combined pressure and in-plane bending

Yun Jae Kim, Chang Sik Oh

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

Based on three-dimensional (3-D) FE limit analyses, this paper provides plastic limit, collapse and instability load solutions for pipe bends under combined pressure and in-plane bending. The plastic limit loads are determined from FE limit analyses based on elastic-perfectly-plastic materials using the small geometry change option, and the FE limit analyses using the large geometry change option provide plastic collapse loads (using the twice-elastic-slope method) and instability loads. For the bending mode, both closing bending and opening bending are considered, and a wide range of parameters related to the bend geometry is considered. Based on the FE results, closed-form approximations of plastic limit and collapse load solutions for pipe bends under combined pressure and bending are proposed.

Original languageEnglish
Pages (from-to)1437-1454
Number of pages18
JournalEngineering Fracture Mechanics
Volume73
Issue number11
DOIs
Publication statusPublished - 2006 Jul 1
Externally publishedYes

Keywords

  • Collapse load
  • Combined pressure and in-plane bending
  • Finite element limit analysis
  • Instability load
  • Large geometry change
  • Limit load
  • Pipe bend
  • Small geometry change

ASJC Scopus subject areas

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

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