Fatigue notch sensitivity and the notch size effect

A. J. McEvily, M. Endo, K. Yamashita, S. Ishihara, H. Matsunaga

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


It has long been known that the fatigue notch factor KF, given by σw0w, where σw0 is smooth specimen fatigue strength (R = -1) and σw is the fatigue strength of a notch-containing specimen, is less than the theoretical stress concentration factor, KT. Empirical rules have been proposed by Peterson and by Kuhn and Hardrath for the estimation of KF which involve the notch radius and a material constant. El Haddad, Topper and Smith provided one means for understanding the factors determining KF. The present paper provides an alternative approach based upon a consideration of the development of fatigue crack closure. The effect of crack closure on the formation of non-propagating cracks is also discussed.

Original languageEnglish
Pages (from-to)2087-2093
Number of pages7
JournalInternational Journal of Fatigue
Issue number12
Publication statusPublished - Dec 1 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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