Effects of mean shear stress on the torsional fatigue strength of a spring steel with small scratches

Y. Nishimura, K. Yanase, Y. Tanaka, N. Miyamoto, S. Miyakawa, M. Endo

研究成果: Contribution to journalArticle査読

8 被引用数 (Scopus)

抄録

The torsional fatigue behavior of a high-strength spring steel, SWOSC-V, was investigated. Of particular interest were the influences of small scratches and superimposed static shear stress in the very high cycle fatigue regime. To achieve the research objectives, an ultrasonic torsional fatigue testing machine was developed. S-Ncurves showed the fatigue limit for the tested material condition (i.e. with no residual stresses at specimen surface). This study revealed that a notable influence of the stress ratio, R, on the torsional fatigue behavior was not explicitly recognized. Concerning the influence of small scratches, it was found that the √area -parameter model can predict the lower bound of the torsional fatigue limit, irrespective of the value of R.

本文言語英語
ページ(範囲)4-18
ページ数15
ジャーナルInternational Journal of Damage Mechanics
29
1
DOI
出版ステータス出版済み - 1 1 2020

All Science Journal Classification (ASJC) codes

  • 計算力学
  • 材料科学(全般)
  • 材料力学
  • 機械工学

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