STP942: Notch Effect on Low Cycle Fatigue in Creep-Fatigue at High Temperatures: Experiment and Finite Element Method Analysis

    M, Ohnami
    Professor and Assistant Professor, Ritsumeikan University, Kyoto,

    Y, Asada
    Professor, The University of Tokyo, Tokyo,

    M, Sakane
    Professor and Assistant Professor, Ritsumeikan University, Kyoto,

    M, Kitagawa
    Chief Researcher, Research Institute, Ishikawajima-Harima Heavy Industries Co., Ltd., Tokyo,

    T, Sakon
    Senior Research Engineer, Technical Institute, Mitsubishi Heavy Industries, Ltd., Takasago,

    Pages: 30    Published: Jan 1988


    This paper describes the notch effect on low cycle fatigue in creep-fatigue conditions by experiments and finite element method (FEM) analysis. FEM analyses for cyclic and monotonic loadings were made, and the analytical results were compared with the measured strain at the notch root using a high temperature strain gage. The calculated strain by FEM agreed well with the measured strain if we used the proper FEM model and proper constitutive equation. In order to examine the accuracy of life prediction by FEM analysis, low cycle fatigue tests were also carried out using SUS 304 stainless steel for notched plate and notched round bar specimens. Life prediction by FEM analysis had sufficient accuracy; the applicability of other conventional life prediction methods was also discussed.


    low-cycle fatigue, notch effect, elevated temperature, finite element method, creep fatigue interaction

    Paper ID: STP24540S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP24540S

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