Determination of J-integral using the load-COD record for circumferential through-wall cracked pipes

Nam S. Huh, Yun-Jae Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The present paper provides experimental J estimation equation based on the load-crack opening displacement (COD) record for testing the circumferential through-wall cracked pipe under combined tension and bending. Based on the limit analysis and the kinematically admissible rigid-body rotation field, the plastic η-factorfor the load-COD record is derived and is compared with that for the load-load line displacement record. Comparison with the J results from detailed elastic-plastic finite element analysis shows that the proposed method based on the load-COD record provides reliable J estimates even for shallow cracks (small crack angle), whereas the conventional approach based on the load-load line displacement record gives erroneous results for shallow cracks. Thus, the proposed J estimation method could be recommended for testing the circumferential through-wall cracked pipe, particularly with shallow cracks.

Original languageEnglish
Pages (from-to)0414021-0414027
Number of pages7
JournalJournal of Pressure Vessel Technology, Transactions of the ASME
Volume130
Issue number4
DOIs
Publication statusPublished - 2008 Nov 1

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Pipe
Cracks
Plastics
Testing
Finite element method

Keywords

  • Circumferential through-wall cracked pipe
  • Combined tension and bending
  • Crack opening displacement
  • J testing
  • Plastic η-factor

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Safety, Risk, Reliability and Quality

Cite this

Determination of J-integral using the load-COD record for circumferential through-wall cracked pipes. / Huh, Nam S.; Kim, Yun-Jae.

In: Journal of Pressure Vessel Technology, Transactions of the ASME, Vol. 130, No. 4, 01.11.2008, p. 0414021-0414027.

Research output: Contribution to journalArticle

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