Fretting fatigue under variable amplitude loading below fretting fatigue limit

Yoshiyuki Kondo, Chu Sakae, Masanobu Kubota, Hiroki Kitahara, Kazutoshi Yanagihara

    Research output: Contribution to journalArticlepeer-review

    3 Citations (Scopus)

    Abstract

    The fatigue limit diagram shows the allowable stress zone for constant amplitude fatigue loading. It was shown is this study that fretting fatigue failure occured in the case of variable amplitude loading condition even when every stress amplitude was kept below the fretting fatigue limit diagram. The reason why such a phenomenon occurred was examined using repeated two-step loading fretting fatigue test. The first step stress of the repeated two-step loading was chosen as R= -1 and the second step stress was with high mean stress. A non-propagating crack was formed by the first step stress even well below the fatigue limit. This crack functioned as a pre-crack for the second step stress with high mean stress. Consequently, fatigue failure did occur even when every stress was kept below the fretting fatigue limit diagram of constant amplitude. The fatigue limit diagram does not necessarily guarantee the safety in the case of variable amplitude loading.

    Original languageEnglish
    Pages (from-to)763-768
    Number of pages6
    JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
    Volume71
    Issue number5
    Publication statusPublished - May 2005

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering

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