Non-propagating crack behaviour at giga-cycle fretting fatigue limit

Y. Kondo, C. Sakae, Masanobu Kubota, K. Yanagihara

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    Fretting fatigue fracture of industrial machines is sometimes experienced after a long period of operation. It has been a question whether the fatigue limit which means infinite life really exists in fretting fatigue or not. Fretting fatigue tests in ultra high cycle region up to 109 cycles were performed. Test results showed that the S-N curve had a knee point around 2 × 107 cycles and a clear fatigue limit was observed in the giga-cycle regime for partial slip conditions. An electropotential drop technique was applied to detect the crack growth behaviour under the contact pad. The real-time measurement of crack depth during the fretting fatigue test at the fatigue limit showed that a crack initiated at an early stage and then ceased to grow after 2 × 107 cycles and the crack became a non-propagating crack. These results indicated that the fatigue limit exists in fretting fatigue and infinite endurance is achieved by the mechanism of forming a non-propagating crack.

    Original languageEnglish
    Pages (from-to)501-506
    Number of pages6
    JournalFatigue and Fracture of Engineering Materials and Structures
    Volume28
    Issue number6
    DOIs
    Publication statusPublished - Jun 2005

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering
    • Materials Science(all)

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