Dominant factors for very-high-cycle fatigue of high-strength steels and a new design method for components

H. Matsunaga, C. Sun, Y. Hong, Y. Murakami

研究成果: ジャーナルへの寄稿学術誌査読

34 被引用数 (Scopus)

抄録

Dominant factors affecting fatigue failure from non-metallic inclusions in the very-high-cycle fatigue (VHCF) regime are reviewed, and the mechanism for the disappearance of the conventional fatigue limit is discussed. Specifically, this paper focuses on the following: (i) the crucial role of internal hydrogen trapped by non-metallic inclusions for the growth of the optically dark area (around the non-metallic inclusion at fracture origin), (ii) the behaviour of the crack growth from a non-metallic inclusion as a small crack and (iii) the statistical aspects of the VHCF strength, in consideration of the maximum inclusion size, using statistics of extremes. In addition, on the basis of the aforementioned findings, a new fatigue design method is proposed for the VHCF regime. The design method gives the allowable stress, σallowable, for a determined design life, NfD, as the lower bound of scatter of fatigue strength, which depends on the amount of components produced.

本文言語英語
ページ(範囲)1274-1284
ページ数11
ジャーナルFatigue and Fracture of Engineering Materials and Structures
38
11
DOI
出版ステータス出版済み - 11月 2015

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 材料力学
  • 機械工学

フィンガープリント

「Dominant factors for very-high-cycle fatigue of high-strength steels and a new design method for components」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル