Significance of the small crack growth law and its practical application

N. Kawagoishi, Q. Chen, H. Nisitani

研究成果: ジャーナルへの寄稿記事

23 引用 (Scopus)

抜粋

The effects of microstructure and specimen size on the fatigue crack growth rate of an annealed 0.42 C steel were investigated under uniaxial fatigue loading in air. Although a dramatic fluctuation of crack growth rate was found in the propagation process of microstructurally small cracks, the mean value of crack growth rate can be evaluated by a simple mechanical parameter, σanl (l, crack length; n, constant), under high stress levels where small-scale yielding conditions are exceeded. This parameter is also effective for cracks larger than 1 to 2 mm under high stress levels, as long as the finite boundary effect of a specimen on the driving force of crack propagation is considered. The crack growth rate of the alloy was described as a function of stress amplitude and crack length in terms of two mechanical parameters, σanl and ΔK. The applicable conditions of the two parameters were discussed and manifested.

元の言語英語
ページ(範囲)2005-2013
ページ数9
ジャーナルMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
31
発行部数8
DOI
出版物ステータス出版済み - 1 1 2000
外部発表Yes

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

これを引用