Near-threshold fatigue behaviors of small shear cracks in bearing steel

D. Koyanagi, N. Shomura, M. Endo, H. Matsunaga, S. Moriyama

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

Failures of engineering components caused by rolling contact fatigue, such as flaking in bearings, are closely related to the initiation and growth of share-mode, i.e. Modes II and III, fatigue cracks. In order to evaluate quantitatively the fatigue strength of those components, it is necessary to elucidate the propagation and threshold behaviors of share-mode cracks, particularly for small cracks, on the basis of fracture mechanics. In this study, fatigue tests of fully-reversed cyclic torsion superposed upon static compression were carried out using SAE52100 bearing steel shafts into which semi-elliptical cracks smaller than 1 mm in size were initially introduced in the axial direction. Propagation and non-propagation of shear-mode fatigue cracks were controlled by changing the torsional stress amplitude. The threshold stress intensity factor (SIF) range for a share-mode crack was defined at the minimum stress required for crack propagation. Crack face interference was responsible for the reduction in crack driving force. An intrinsic value of threshold SIF range that does not include the effect of crack face interference was obtained to be approximately 13 MPa? m0.5.

本文言語英語
ホスト出版物のタイトルFourth International Conference on Experimental Mechanics
DOI
出版ステータス出版済み - 12 1 2010
外部発表はい
イベント4th International Conference on Experimental Mechanics - Singapore, シンガポール
継続期間: 11 18 200911 20 2009

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
7522
ISSN(印刷版)0277-786X

その他

その他4th International Conference on Experimental Mechanics
Countryシンガポール
CitySingapore
Period11/18/0911/20/09

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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