Comparison of existing plastic collapse load solutions with experimental data for 90° elbows

Jae Jun Han, Kuk Hee Lee, Nak Hyun Kim, Yun Jae Kim, Dong Wook Jerng, Peter J. Budden

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


This paper compares published experimental plastic collapse loads for 90° elbows with existing closed-form solutions. A total of 46 experimental data are considered, covering pure bending (in-plane closing, in-plane opening and out-of-plane bending) and combined pressure and bending loads. The plastic collapse load solutions considered are from the ASME code, the Ductile Fracture handbook of Zahoor, by Chattopadhyay and co-workers, and by Y.-J. Kim and co-workers. Comparisons with the experimental data shows that the ASME code solution is conservative by a factor of 2 on collapse load for in-plane closing bending, 2.3 for out-of-plane bending, and 3 for in-plane opening bending. The solutions given by Kim and co-workers give the least conservative estimates of plastic collapse loads, although they provide slightly non-conservative estimates for some data.

Original languageEnglish
Pages (from-to)19-27
Number of pages9
JournalInternational Journal of Pressure Vessels and Piping
Publication statusPublished - 2012 Jan
Externally publishedYes


  • Elbow
  • Finite element analysis
  • In-Plane bending
  • Internal pressure
  • Limit load

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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