Fracture criterion of a mixed-mode crack (3rd report, a study on evaluation of fracture parameter CED in an arbitrary direction by finite element method)

Takao Utsunomiya, Katsuhiko Watanabe

Research output: Contribution to journalArticle

Abstract

In the series of papers, the authors proposed the fracture criteria for mode I (opening type) fracture and mode II (shear type) fracture in a mixed-mode crack based on the CED (crack energy density) in an arbitrary direction, Eφ, and the applicability of these criteria to mixed-mode crack has been investigated through the fracture experiments of specimens with an inclined crack under tensile/shear type loading. In this paper, the evaluation method of Eφ by finite element method is studied. Elastic-plastic finite element analyses are carried out for the above mentioned fracture experiments and Eφ and its contribution of each mode are evaluated by path-independent integrals and the method based on load-displacement curves. Based on the results, we examine the fundamental properties in the evaluation of Eφ and so on in elastic case and, simultaneously, develop a practical method to evaluate Ephi and so on in elastic plastic case which makes the application of the fracture criteria to the fracture of a mixed-mode crack realistic and easy.

Original languageEnglish
Pages (from-to)1590-1597
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume59
Issue number563
Publication statusPublished - 1993 Jul
Externally publishedYes

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Cracks
Finite element method
Plastics
Direction compound
Experiments

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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