The effect of multi-axial stress component on creep crack growth rate concerning structural brittleness

Toshimitsu Yokobori, R. Sugiura, M. Tabuchi, A. Fuji, T. Adachi, T. Yokobori

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

    20 Citations (Scopus)

    Abstract

    A circular notched round bar specimen produces multi-axial stress field when uni-axial stress is applied in the axial direction. This stress field is produced in practical component structure. Therefore the characterization of creep crack growth rate under this condition is important for practical use. In this paper, developed 12Cr ferritic heat resistant steel was noticed. High temperature creep crack growth tests were conducted for a circular notched specimen for 12Cr ferritic heat resistant steel. And in order to investigate multi-axial stress state of a circular notched specimen, we have conducted 3D FEM analysis. The stress multiaxiality of a circular notched specimen increased as compare with that of CT specimen. Q* parameter which predicts creep crack growth rate is derived for this specimen. On the bases of this Q* parameter, the algorithm of predicting the life of creep growth is proposed.

    Original languageEnglish
    Title of host publication11th International Conference on Fracture 2005, ICF11
    Pages1663-1668
    Number of pages6
    Publication statusPublished - 2005 Dec 1
    Event11th International Conference on Fracture 2005, ICF11 - Turin, Italy
    Duration: 2005 Mar 202005 Mar 25

    Publication series

    Name11th International Conference on Fracture 2005, ICF11
    Volume3

    Other

    Other11th International Conference on Fracture 2005, ICF11
    CountryItaly
    CityTurin
    Period05/3/2005/3/25

    ASJC Scopus subject areas

    • Geotechnical Engineering and Engineering Geology

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