Revealing the mechanism of critical root radius in notch fatigue limit based on crack closure concept

Bochuan Li, Chao Jiang, Hiroshi Noguchi, Long Liu

研究成果: ジャーナルへの寄稿記事

抄録

The critical root radius, named as branch point, exists in notch fatigue limit, below which the fatigue limit appears to be independent of the root radius. Two theoretical models were proposed in this paper to discuss the characteristics of critical root radius and notch fatigue limit. The first one was the qualitative model by modifying the Dugdale model for fatigue crack growth from notch tip and it was used to analyze the forming mechanism and notch size dependence of critical root radius. Upon on the above systematical analysis for critical root radius, the second model was presented, based on crack closure concept, to quantitatively predict the notch fatigue limit for various notched specimens. Its effectiveness and capability were demonstrated by fatigue experimental data from ten kinds of materials under different stress ratios.

元の言語英語
記事番号105261
ジャーナルInternational Journal of Fatigue
130
DOI
出版物ステータス出版済み - 1 2020

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Fatigue Crack Propagation
Fatigue Limit
Crack Closure
Fatigue Crack Growth
Crack closure
Notch
Fatigue crack propagation
Radius
Roots
Fatigue of materials
Branch Point
Fatigue
Theoretical Model
Concepts
Experimental Data
Model
Predict

All Science Journal Classification (ASJC) codes

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

これを引用

Revealing the mechanism of critical root radius in notch fatigue limit based on crack closure concept. / Li, Bochuan; Jiang, Chao; Noguchi, Hiroshi; Liu, Long.

:: International Journal of Fatigue, 巻 130, 105261, 01.2020.

研究成果: ジャーナルへの寄稿記事

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