Correlations among growth law of small cracks, low-cycle fatigue law and applicability of miner's rule

Y. Murakami, S. Harada, T. Endo, H. Tani-Ishi, Y. Fukushima

研究成果: ジャーナルへの寄稿記事

45 引用 (Scopus)

抄録

The initiation and propagation process of a small crack in low-cycle fatigue of a medium carbon steel is observed in detail by the plastic replica method. It is found that the Manson-Coffin relation is virtually the same as the crack growth law of a small crack; more than 90% (almost 100%) of the fatigue life of plain specimens is occupied by the crack propagation process. From this viewpoint, the ambiguity in the definition of the initiation of "an engineering-size crack" can be removed. The effects of prior fatigue history on the growth rate of a small crack are investigated systematically using special specimens containing an artificial small hole with diameters of 40, 100 and 200 μ m. Prior fatigue history which may be accumulated at the region where a crack will later propagate hardly influences the crack growth rate, i.e. prior fatigue history itself should not be regarded as fatigue damage. This is an essential condition for Miner's rule to apply.

元の言語英語
ページ(範囲)909-924
ページ数16
ジャーナルEngineering Fracture Mechanics
18
発行部数5
DOI
出版物ステータス出版済み - 1983

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Miners
Fatigue of materials
Cracks
Crack propagation
Fatigue damage
Carbon steel
Plastics

All Science Journal Classification (ASJC) codes

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

これを引用

Correlations among growth law of small cracks, low-cycle fatigue law and applicability of miner's rule. / Murakami, Y.; Harada, S.; Endo, T.; Tani-Ishi, H.; Fukushima, Y.

:: Engineering Fracture Mechanics, 巻 18, 番号 5, 1983, p. 909-924.

研究成果: ジャーナルへの寄稿記事

Murakami, Y. ; Harada, S. ; Endo, T. ; Tani-Ishi, H. ; Fukushima, Y. / Correlations among growth law of small cracks, low-cycle fatigue law and applicability of miner's rule. :: Engineering Fracture Mechanics. 1983 ; 巻 18, 番号 5. pp. 909-924.
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