CRACK BAND MODEL FOR FRACTURE OF GEOMATERIALS.

Zdenek P Bazant*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

86 Scopus citations

Abstract

Due to their heterogeneity, fracture in rocks as well as the artificial rock-concrete propagates with a dispersed band of microcracks at the front. The progressive formation of the microcracks is described by a triaxial stress-strain relation which exhibits a gradual strain-softening. The stiffness matrix of a material intersected by a system of parallel continuously distributed cracks is obtained in the limit. The area under the stress-strain curve, multiplied by the width of the crack band (fracture process zone) represents the fracture energy. The resulting fracture theory is characterized by three independent parameters, the fracture energy, the tensile strength, and the width of the crack band, the latter being empirically found to approximately equal five-times the grain size in rock. The formulation lends itself easily to a finite element analysis which is employed to calibrate the theory by fitting various test data on rock fracture available in the literature. Refs.

Original languageEnglish (US)
Title of host publicationUnknown Host Publication Title
EditorsZ. Eisenstein
PublisherA. A. Balkema
Pages1137-1152
Number of pages16
ISBN (Print)9061912431
StatePublished - Dec 1 1982

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Bazant, Z. P. (1982). CRACK BAND MODEL FOR FRACTURE OF GEOMATERIALS. In Z. Eisenstein (Ed.), Unknown Host Publication Title (pp. 1137-1152). A. A. Balkema.