Quantification of Thickness Effects for Circumferential Through-Wall Cracked Pipe Bend with Un-Uniform Thickness under In-Plane Opening Bending

C. G. Kim, K. D. Bae, Yun Jae Kim

Research output: Contribution to journalConference article

2 Citations (Scopus)


An Elbow is one of the major component that make up the piping system of a nuclear power plant and chemical plant facilities. In general, the elbow is made by welding a straight pipe and bend part. So, periodic welding inspection is required due to the potential defects in weld zone. Recently, the application of induction heating pipe bend is increasing in order to reduce this problem. Pipe bend made by induction heating band is not necessary welding process because it is made by bending a straight pipe but the intrados thickness and the extrados thickness are different. On the other hand, J-integral is widely used to evaluate a structural integrity (to check crack stability) but the J estimation of pipe bend with un-uniform thickness is very difficult because of the thickness differences in each locations. This paper proposes a reference stress based J estimation scheme of circumferential through-wall cracked pipe bend with un-uniform thickness under in-plane opening bending loading condition. The pipe bend with un-uniform thickness is assumed to have different thickness between intrados and extrados and the crack to be located in the entre of the pipe bend, either at the intrados or extrados.

Original languageEnglish
Pages (from-to)1779-1787
Number of pages9
JournalProcedia Engineering
Publication statusPublished - 2015 Jan 1
Externally publishedYes
Event14th International Conference on Pressure Vessel Technology, 2015 - Shanghai, China
Duration: 2015 Sep 232015 Sep 26



  • Circumferential through-wall crack
  • Elbow
  • Equivalent thickness
  • J-integral
  • Optimized reference load
  • Pipe bend

ASJC Scopus subject areas

  • Engineering(all)

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