Effect of internal pressure on plastic loads of 90° elbows with circumferential part-through surface cracks under in-plane bending

Seok Pyo Hong, Jong Hyun Kim, Yun Jae Kim, P. J. Budden

Research output: Contribution to journalArticle

15 Citations (Scopus)


This paper quantifies the effect of internal pressure on plastic loads for elbows with circumferential through-wall and constant-depth part-through surface cracks under in-plane bending. Results are based on FE limit analyses using elastic-perfectly plastic materials and the non-linear geometry option. It is found that, for larger values of r/t, the pressure effect on plastic loads is more pronounced and plastic loads for combined loading cases could be much higher than those for pure bending cases. Full FE data of plastic loads are tabulated, and effects of crack geometries on interaction curves are discussed.

Original languageEnglish
Pages (from-to)577-596
Number of pages20
JournalEngineering Fracture Mechanics
Issue number4
Publication statusPublished - 2010 Mar 1



  • Circumferential crack
  • Combined pressure and in-plane bending
  • Elbow
  • Finite element limit analysis
  • Plastic load

ASJC Scopus subject areas

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

Cite this