Fatigue limit evaluation of blunt-notched specimen using Δk th value of small crack (1st report: Study on the determination of the initial crack size with annealed carbon steel when stress ratio is zero)

Takahiro Matsueda, Yuuta Aono, Hiroshi Noguchi

Research output: Contribution to journalArticlepeer-review

Abstract

The fatigue limit of a blunt-notched specimen is dependent on the fatigue crack initiation limit δw1. δw1 is the propagating limit of the micro fatigue crack at notch root. However, before now no method for evaluating the δw1 based on fatigue crack properties had ever been proposed. In this paper, it is suggested that the initial crack size is dependent on the relationship between the application limit of the characteristic elastic field of the notch and the fatigue crack length measured from the notch root. It is also found that when the initial crack size is given, sw1 can be evaluated from the threshold stress intensity factor range ΔKth.

Original languageEnglish
Pages (from-to)228-232
Number of pages5
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume77
Issue number773
DOIs
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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