Fundamental study on mixed mode fracture criterion in terms of CED (Crack Energy Density)

K. Watanabe, T. Utsunomiya

Research output: Contribution to journalConference articlepeer-review


A fundamental study on the mixed mode fracture criterion of an elastic-plastic crack was performed based on the concept of CED (Crack Energy Density). The CED, εφ, in arbitrary direction, which is defined and has a consistent meaning without any restriction on constitutive equation, can be divided into the contributions of each mode generally and the CED, εφI, for mode I is expected to play the most important role in the mixed mode fracture criterion. In this paper, εφ and εφI for elastic specimens under tension with a crack inclined to the loading axis are evaluated by two methods, that is, by path-independent integrals and the relationship between εφ and load-displacement curves through finite element analyses, and a practical method to evaluate εφmaxI, which is εφI in the direction where εφI takes the maximum value, through finite element analyses with a sufficient accuracy is proposed through the comparison of the results with theoretical ones.

Original languageEnglish
Pages (from-to)25-30
Number of pages6
JournalAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Publication statusPublished - 1989 Dec 1
EventMetallic Bellows and Expansion Joints - 1898 - Honolulu, HI, USA
Duration: 1989 Jul 231989 Jul 27

ASJC Scopus subject areas

  • Mechanical Engineering


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