STP1159: Fretting Fatigue in the Power Generation Industry: Experiments, Analysis, and Integrity Assessment

    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

    Pages: 17    Published: Jan 1992


    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


    Paper ID: STP25828S

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP25828S


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