A robust method for Ramberg-Osgood fit relevant to elastic-plastic J estimates

N. S. Huh, Y. J. Kim, Y. J. Kim, Y. H. Choi, J. S. Yang

Research output: Contribution to journalConference articlepeer-review


This paper proposes a robust method for the Ramberg-Osgood (R-O) fit to accurately estimate elastic-plastic J from engineering fracture mechanics analysis based on deformation plasticity. The proposal is based on engineering stress-strain data to determine the R-O parameters, instead of true stress-strain data. Moreover, for practical applications, the method is given not only for the case when full stress-strain data are available but also for the case when only yield and tensile strengths are available. Reliability of the proposed method for the R-O fit is validated against detailed 3-D finite element (FE) analyses for circumferential through-wall cracked pipes under global bending using two different materials, stainless steel and ferritic steel.

Original languageEnglish
Pages (from-to)195-200
Number of pages6
JournalKey Engineering Materials
Issue numberI
Publication statusPublished - 2004
Externally publishedYes
EventAdvances in Fracture and Failure Prevention: Proceedings of the Fifth International Conference on Fracture and Strength of Solids (FEOFS2003): Second International Conference on Physics and Chemistry of Fracture and Failure Prevention (2nd ICPCF) - Sendai, Japan
Duration: 2003 Oct 202003 Oct 22


  • Circumferential Through-Wall Crack
  • J-Integral
  • Leak-Before-Break
  • Ramberg-Osgood

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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