Determination method of ramberg-osgood constants for leak before break evaluation

Kyung Dong Bae, Ho Wan Ryu, Yun Jae Kim, Jin Weon Kim, Jong Sung Kim, Young Jin Oh

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, a method for determining Ramberg-Osgood constants for leak-before-break evaluation was investigated. The Ramberg-Osgood constants were calculated for SA312, TP316, and SA-508 Gr.1a in an operating temperature of 316 oC. Incremental plasticity, using stress-strain data obtained from experiment, and deformation plasticity, using the Ramberg-Osgood constants, were considered in a finite element analysis. Using incremental plasticity and deformation plasticity, J-integrals and crack opening displacement values were calculated and compared. By comparing the results of incremental plasticity and deformation plasticity, a suitable method for determining Ramberg-Osgood constants for leak-before-break evaluation was confirmed.

Original languageEnglish
Pages (from-to)645-652
Number of pages8
JournalTransactions of the Korean Society of Mechanical Engineers, A
Volume39
Issue number7
DOIs
Publication statusPublished - 2015 Jul 1
Externally publishedYes

Keywords

  • Circumferential through-wall crack
  • Crack opening displacement
  • Deformation plasticity
  • Incremental plasticity
  • J - integral
  • Leak before break assessment
  • Ramberg-osgood equation

ASJC Scopus subject areas

  • Mechanical Engineering

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