Limit and plastic collapse loads for un-reinforced mitred bends under pressure and bending

Sung Hwan Min, Jun Young Jeon, Kuk Hee Lee, Yun Jae Kim, Peter J. Budden

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Approximate limit and plastic collapse load solutions for un-reinforced mitred bends under internal pressure and under bending are proposed in this paper, based on three-dimensional finite element analysis and approximate solutions for smooth bends. Solutions are given for single- and multi-mitred bends (mainly for single and double segmented bends) with the pipe mean radius-to-thickness ratio (r/t) ranging from r/t = 5 to r/t = 50, and the bend radius-to-mean radius ratio (R/r) from R/r = 2 to R/r = 4. Internal pressure, in-plane bending and out-of-plane bending loads are considered, but not their combination. It is found that the essential features of limit and plastic collapse loads for mitred bends are similar to those for smooth bends, and thus existing solutions for smooth elbows can be used to construct limit loads and plastic collapse for mitred bends.

Original languageEnglish
Pages (from-to)482-494
Number of pages13
JournalInternational Journal of Pressure Vessels and Piping
Issue number11-12
Publication statusPublished - 2011 Dec

Bibliographical note

Funding Information:
This research is supported by Engineering Research Center (No. 2009-0063170 ), funded by Korea Science & Engineering Foundation and by the Nuclear Research & Development of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Ministry of Knowledge Economy, Republic of Korea . (No. 2010T100100780 ).

Copyright 2011 Elsevier B.V., All rights reserved.


  • Bending
  • Finite element limit analysis
  • Internal pressure
  • Limit load
  • Mitred bends
  • Plastic collapse load

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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