Elastic-plastic J and COD estimates for axial through-wall cracked pipes

Yun-Jae Kim, Nam Su Huh, Young Jae Park, Young Jin Kim

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

This paper proposes engineering estimation equations of elastic-plastic J and crack opening displacement (COD) for axial through-wall cracked pipes under internal pressure. On the basis of detailed 3D finite element (FE) results using deformation plasticity, the plastic influence functions for fully plastic J and COD solutions are tabulated as a function of the mean radius-to-thickness ratio, the normalised crack lenght, and the strain hardening. On the basis of these results, the GE/EPRI-type J and COD estimation equations are proposed and validated against 3D FE results based on deformation plasticity. For more general application to general stress-strain laws or to complex loading, the developed GE/EPRI-type solutions are re-formulated based on the reference stress (RS) concept. Such a re-formulation provides simpler equations for J and COD, which are then further extended to combined internal pressure and bending. The proposed RS based J and COD estimation equations are compared with elastic-plastic 3D FE results using actual stress-strain data for Type 316 stainless steels. The FE results for both internal pressure cases and combined internal pressure and bending cases compare very well with the proposed J and COD estimates.

Original languageEnglish
Pages (from-to)451-464
Number of pages14
JournalInternational Journal of Pressure Vessels and Piping
Volume79
Issue number6
DOIs
Publication statusPublished - 2002 Jun 6
Externally publishedYes

Fingerprint

Pipe
Plastics
Cracks
Plasticity
Stainless Steel
Strain hardening
Stainless steel

Keywords

  • Axial through-wall crack
  • Crack opening displacement
  • Finite element
  • J-integral
  • Plastic influence functions
  • Reference stress approach

ASJC Scopus subject areas

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

Cite this

Elastic-plastic J and COD estimates for axial through-wall cracked pipes. / Kim, Yun-Jae; Huh, Nam Su; Park, Young Jae; Kim, Young Jin.

In: International Journal of Pressure Vessels and Piping, Vol. 79, No. 6, 06.06.2002, p. 451-464.

Research output: Contribution to journalArticle

Kim, Yun-Jae ; Huh, Nam Su ; Park, Young Jae ; Kim, Young Jin. / Elastic-plastic J and COD estimates for axial through-wall cracked pipes. In: International Journal of Pressure Vessels and Piping. 2002 ; Vol. 79, No. 6. pp. 451-464.
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