Non-propagating crack at giga-cycle fretting fatigue limit

Yoshiyuki Kondo, Chu Sakae, Masanobu Kubota, Kazutoshi Yanagihara

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    We sometimes experience fretting fatigue fracture of industrial machines after a long period of operation. It has been a question whether the fatigue limit really exists in fretting fatigue or not. In this report, fretting fatigue tests in giga-cycle region up to 109 cycles were performed. There was a knee point in the S-N curve and it was verified that no fracture was observed up to 109 cycles. An electro-potential drop technique was developed to detect the micro-crack growth behavior of the fretting fatigue. It was shown that the micro-crack generated by fretting ceased to grow and became a non-propagating crack at fatigue limit. These results indicated that the fatigue limit can exist also in fretting fatigue. The infinite endurance limit can be achieved by the mechanism that initiated fretting fatigue cracks become non-propagating cracks.

    Original languageEnglish
    Pages (from-to)1066-1071
    Number of pages6
    JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
    Volume70
    Issue number8
    DOIs
    Publication statusPublished - Aug 2004

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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