STP519

    The Role of Cyclic Stress-Strain Behavior on Fatigue Damage Under Varying Load

    Published: Jan 1971


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    Abstract

    The stress-strain response for a complex varying load was analysed on the basis of a cyclic stress-strain curve obtained by incremental step stress tests. A new cumulative fatigue damage law was proposed, considering the fact that the cyclic stress-strain curve for complex varying load differs from that for constant amplitude cyclic load. Assuming that local stress-strain behavior at a stress concentration or a crack tip is similar to that of the bulk material, the law was extended to the case of notched specimen, and the extension was verified by experiment.

    Keywords:

    fatigue (materials), stresses, strains, plastic deformation, damage, predictions, service, steels


    Author Information:

    Koibuchi, K
    Senior researcher and researcher, Mechanical Engineering Research Laboratory, Hitachi Ltd., Tokyo,

    Kotani, S
    Senior researcher and researcher, Mechanical Engineering Research Laboratory, Hitachi Ltd., Tokyo,


    Paper ID: STP38033S

    Committee/Subcommittee: E08.05

    DOI: 10.1520/STP38033S


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