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    Fretting Fatigue Analysis of Strength Improvement Models with Grooving or Knurling on a Contact Surface

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    Previously the authors introduced a fretting fatigue evaluation method using stress analysis and fracture mechanics analysis of the contacting structures. Using this method the fretting fatigue limit can be estimated by comparing the calculated stress intensity factor of the crack which originates at the contact edge with the material's threshold stress intensity factor range.

    In this paper the authors apply this fretting fatigue strength evaluation method to fretting fatigue strength improvement models with grooving or knurling on a contact surface. These estimated results are compared with the experimental results of a fretting fatigue test using grooving or knurling pad type specimens. The strength improvement of these two models can be confirmed analytically and experimentally. Finally, the optimization of groove shapes such as the radius and depth of a groove are discussed using the above evaluation method.


    fretting fatigue, fatigue limit, fracture mechanics, stress intensity factor, nonpropagating crack, boundary element method, groove, knurling

    Author Information:

    Hattori, T
    Reliability Improvement of Machine Elements and Products, Tsuchiura-city, Ibarakipref.,

    Nakamura, M
    Researcher, Mechanical Engineering Research Laboratory, Hitachi Ltd., Tsuchiura, Ibaraki,

    Ishizuka, T
    Senior Engineer, Hitachi Works, Hitachi Ltd., Hitachi, Ibaraki,

    Committee/Subcommittee: E08.08

    DOI: 10.1520/STP25822S