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    A Critical Review of Fretting Fatigue Investigations at the Royal Aerospace Establishment

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    The Royal Aerospace Establishment (RAE) of the United Kingdom has been involved in fretting fatigue research for about 15 years. This paper summarizes the work that has been carried out and describes research that is currently being undertaken. It also presents the authors' views of future requirements in fretting fatigue testing and modeling of contact stresses in fatigue loaded structures. The main aims of the RAE research are to determine the important factors which influence the initiation and propagation of fretting fatigue cracks and to develop fracture mechanics models which could be applied to structural situations. To achieve these aims considerable work has been undertaken to develop both fretting fatigue testing equipment and theoretical models of the fretting fatigue process. This paper describes the developments made in both areas.

    A summary is given of the fretting fatigue variables that have been considered in the test programs to date. Early fracture mechanics models are briefly described and their ability to predict fatigue endurances is assessed. These models which were based on a growing edge crack have been modified to take account of the early growth of inclined cracks under fretting conditions. A critical review is made of testing methods and the authors' views on essential testing requirements are presented. The Report concludes with a discussion of the direction of future work both at the RAE and in the proposed ASTM activities.


    fretting, fatigue, fractional force, fracture mechanics, stress intensity factors, aluminum alloys, standardization, test methods

    Author Information:

    Rayaprolu, DB
    Royal Aerospace Establishment, Farnborough, Hants

    Cook, R
    Royal Aerospace Establishment, Farnborough, Hants

    Committee/Subcommittee: E08.01

    DOI: 10.1520/STP25826S