Non-propagating crack at giga-cycle fretting fatigue limit

Yoshiyuki Kondo; Chu Sakae; Masanobu Kubota; Kazutoshi Yanagihara

doi:10.1299/kikaia.70.1066

Non-propagating crack at giga-cycle fretting fatigue limit

Yoshiyuki Kondo, Chu Sakae, Masanobu Kubota, Kazutoshi Yanagihara

Research output: Contribution to journal › Article › peer-review

6 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 language	English
Pages (from-to)	1066-1071
Number of pages	6
Journal	Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume	70
Issue number	8
DOIs	https://doi.org/10.1299/kikaia.70.1066
Publication status	Published - Aug 2004

All Science Journal Classification (ASJC) codes

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1299/kikaia.70.1066

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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.",

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AU - Sakae, Chu

AU - Kubota, Masanobu

AU - Yanagihara, Kazutoshi

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Non-propagating crack at giga-cycle fretting fatigue limit

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