STP1122

    Life Prediction of Circumferentially Grooved Components under Low-Cycle Fatigue

    Published: Jan 1992


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    Abstract

    Stress-strain response was analyzed in the cross section of circumferentially notched components by the finite element method. Then, the cyclic J-integral range, ΔJ was estimated for the semielliptical surface crack and for the circumferential crack. The growth rate of the surface crack was successfully plotted against the estimated J-integral range under low-cycle fatigue loading.

    Furthermore, the transition from the semielliptical surface crack to the circumferential crack, which occurred in the fatigue crack growth process in the acutely notched cylindrical component, was reasonably analyzed in terms of elastic-plastic fracture mechanics.

    Finally, the low-cycle fatigue lives of the dully and acutely notched cylindrical components were satisfactorily evaluated through the analysis of the growth of the surface and circumferential cracks.

    Keywords:

    carbon steel, notched cylindrical component, low-cycle fatigue, finite element method, semielliptical surface crack, circumferential crack, crack initiation, crack growth, cyclic , J, -integral range, life prediction


    Author Information:

    Hatanaka, K
    Professor, Associate Professor, and Graduate Student, Yamaguchi University, Ube,

    Fujimitsu, T
    Professor, Associate Professor, and Graduate Student, Yamaguchi University, Ube,

    Shiraishi, S
    Nippon Steel Corporation, Chiyoda-ku,

    Omori, J
    Professor, Associate Professor, and Graduate Student, Yamaguchi University, Ube,


    Paper ID: STP24171S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP24171S


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