Material property controlling non-propagating fatigue crack length of mechanically and physically short-crack based on Dugdale-model analysis

Naoki Fukumura, Bochuan Li, Motomichi Koyama, Tomohiro Suzuki, Shigeru Hamada, Kaneaki Tsuzaki, Hiroshi Noguchi

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Non-propagating fatigue crack lengths were analytically calculated under stress control conditions using plasticity-induced crack closure analysis with the Dugdale model. In addition, a non-dimensionalization method was applied in terms of the Burgers vector and a monotonic plastic zone size under small-scale yielding conditions, which was validated for various initial crack lengths and material properties. When the yield strength was increased, the non-propagating fatigue crack lengths were found to increase for a short crack and decrease for a long crack. The non-dimensionalization enabled the analytical derivation of a generalized non-propagating fatigue crack length, which can be utilized for fatigue designs. The material property controlling the threshold stress intensity factor range of mechanically and physically short-crack was discussed.

Original languageEnglish
Pages (from-to)193-202
Number of pages10
JournalTheoretical and Applied Fracture Mechanics
Volume90
DOIs
Publication statusPublished - Aug 1 2017

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short cracks
Fatigue Crack
Model Analysis
Material Properties
Materials properties
Crack
cracks
Cracks
Crack Closure
Plastic Zone
Burgers vector
Crack closure
crack closure
Stress Intensity Factor
Stress intensity factors
Plasticity
Monotonic
Fatigue
stress intensity factors
Yield stress

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Applied Mathematics

Cite this

Material property controlling non-propagating fatigue crack length of mechanically and physically short-crack based on Dugdale-model analysis. / Fukumura, Naoki; Li, Bochuan; Koyama, Motomichi; Suzuki, Tomohiro; Hamada, Shigeru; Tsuzaki, Kaneaki; Noguchi, Hiroshi.

In: Theoretical and Applied Fracture Mechanics, Vol. 90, 01.08.2017, p. 193-202.

Research output: Contribution to journalArticle

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AU - Suzuki, Tomohiro

AU - Hamada, Shigeru

AU - Tsuzaki, Kaneaki

AU - Noguchi, Hiroshi

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