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 journalArticlepeer-review

    3 Citations (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

    Bibliographical note

    Publisher Copyright:
    © 2015 The Korean Society of Mechanical Engineers.

    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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