Non-propagating crack at giga-cycle fretting fatigue limit

Yoshiyuki Kondo, Chu Sakae, Masanobu Kubota, Kazutoshi Yanagihara

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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.

元の言語英語
ページ(範囲)1066-1071
ページ数6
ジャーナルNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
70
発行部数8
DOI
出版物ステータス出版済み - 8 2004

All Science Journal Classification (ASJC) codes

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

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