Fracture criterion of a mixed-mode crack based on CED (Crack Energy Density)

Takao Utsunomiya, Katsuhiko Watanabe

研究成果: Article査読

1 被引用数 (Scopus)


The CED (Crack Energy Density) in an arbitrary direction, Eφ{symbol}, is defined as the quantity which has the meaning of strain energy area density in the plane containing a crack front line without any restriction on constitutive equation. We may expect that, as far as the opening type fracture occurs, a mixed mode crack begins to grow in the direction φ{symbol} where Eφ{symbol}I (mode I contribution of Eφ{symbol}) takes the maximum value, Eφ{symbol}maxI, when Eφ{symbol}maxI reaches a critical value peculiar to a material (we call this criterion Eφ{symbol}maxI criterion). In this paper, the applicability of this Eφ{symbol}maxI criterion to elastic-plastic fractures is studied based on the fracture experiments on specimens of Aluminum alloy with a crack inclined to the loading axis and it is demonstrated that the onset and the direction of crack growth can be estimated by Eφ{symbol}maxI criterion in either case of fractures with relatively small yielding region and those with large yielding region. The applicability of Eφ{symbol}maxI criterion to elastic (quasi-elastic) fractures is also shown through the comparison of the result by Eφ{symbol}maxI criterion with the results by other criteria and experimental results.

ジャーナルNuclear Engineering and Design
出版ステータスPublished - 1993 7月 2

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学
  • 材料科学(全般)
  • 安全性、リスク、信頼性、品質管理
  • 廃棄物管理と処理
  • 機械工学


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