STP1159

    Fretting Fatigue in the Power Generation Industry: Experiments, Analysis, and Integrity Assessment

    Published: Jan 1992


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    Abstract

    Experimental procedures for carrying out fretting fatigue tests using either the proving ring method or a specifically developed servo-hydraulic biaxial rig are described. S-N curves are generated with and without fretting in order to establish the important variables that can affect fretting fatigue and to rank material fretting combinations that should be avoided. The S-N tests and associated metallography indicate that small cracks, typically 0.25–0.5 mm deep, initiate rapidly at only a small fraction of fatigue life. Fracture mechanics and near-threshold fatigue concepts can be used to predict the conditions for continued growth or arrest of the small fretting defects.

    Keywords:

    fretting fatigue, experimental fretting rigs, frictional force measurement, S-N, tests, fracture mechanics, small crack growth


    Author Information:

    Lindley, TC
    Plant Engineer and Research Officer, National Power Technology and Environmental Centre, Leatherhead, Surrey

    Nix, KJ
    Plant Engineer and Research Officer, National Power Technology and Environmental Centre, Leatherhead, Surrey


    Paper ID: STP25828S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP25828S


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