A new method of dynamic measurements of the plastic deformation occurring at a fatigue crack tip

Masayuki Shimojo, T. Nagatomo, Y. Higo, S. Nunomura

Research output: Contribution to journalArticle

Abstract

In order to know the plastic deformation behaviour at fatigue crack tips, a new electrochemical method combined with a source wave analysis has been developed. This method provides dynamic measurements of the fresh bare surface creation which occurs at a crack tip. This is achieved by deconvolution calculations of the repassivation current at the fresh surfaces. The fresh surface creation rate increases non-linearly when the stress intensity factor increases linearly. It has also been found that load ratio does not affect the crack tip plastic deformation behaviour.

Original languageEnglish
Pages (from-to)237-241
Number of pages5
JournalInternational Journal of Fatigue
Volume19
Issue number3
Publication statusPublished - 1997 Mar
Externally publishedYes

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Keywords

  • Fatigue crack
  • Fresh surface
  • Plastic deformation

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

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