Finite element damage analyses for predictions of creep crack growth

Chang Sik Oh, Nak Hyun Kim, Sung Hwan Min, Yun Jae Kim

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    9 Citations (Scopus)

    Abstract

    This paper provides the virtual simulation method for creep crack growth test, based on finite element (FE) analyses with damage mechanics. Creep tests of smooth bars are used to quantify the constants of creep constitutive equation. the reduction of area resulting from creep tests of smooth and notched bar is adopted as a measure of creep ductility under multiaxial stress conditions. the creep ductility exhaustion concept is adopted for calculating creep damage, which is defined as the ratio of creep strain to the multiaxial creep ductility. To simulate crack propagation, fully damaged elements are forced to have nearly zero stresses using userdefined subroutine UHARD in the general-purpose FE code, ABAQUS. the results from 2D or 3D FE analyses are compared with experimental data of creep crack growth. It is shown that the predictions obtained from this new method are in good agreement with experimental data.

    Original languageEnglish
    Title of host publicationAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
    Pages331-335
    Number of pages5
    DOIs
    Publication statusPublished - 2010
    EventASME 2010 Pressure Vessels and Piping Division/K-PVP Conference, PVP2010 - Bellevue, WA, United States
    Duration: 2010 Jul 182010 Jul 22

    Publication series

    NameAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
    Volume6
    ISSN (Print)0277-027X

    Other

    OtherASME 2010 Pressure Vessels and Piping Division/K-PVP Conference, PVP2010
    Country/TerritoryUnited States
    CityBellevue, WA
    Period10/7/1810/7/22

    ASJC Scopus subject areas

    • Mechanical Engineering

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