Analysis of uniaxial tensile fracture of monomineral polycrystalline rock based on intergranular cracking

K. Matsuki, Y. Karino, K. Sakaguchi, Akihisa Kizaki

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

Abstract

A finite element analysis of uniaxial tensile fracture was performed for specimen models of monomineral polycrystalline rock under the assumption that fracturing occurs only at the grain boundaries. The constitutive law of the grain boundaries was derived by applying the associated flow rule in the plastic theory and a tension-shear-softening curve to an extended Coulomb criterion. Unloading of intergranular cracks occurs before the peak strength when the intergranular cracks do not compose the final failure plane that is completely formed near the inflection point of the axial stress-axial strain curve after the peak. During the completion of the final failure plane, the conversion of failure mode from tension to shear occurs at intergranular cracks that have a large angle of the normal direction relative to the loading axis, for which the normal stress is in compression in both the initial elastic stage and the final failure stage.

Original languageEnglish
Title of host publicationHarmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics
Pages731-734
Number of pages4
Publication statusPublished - 2012 Feb 13
Event12th International Congress on Rock Mechanics of the International Society for Rock Mechanics, ISRM 2011 - Beijing, China
Duration: 2011 Oct 182011 Oct 21

Publication series

NameHarmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics

Other

Other12th International Congress on Rock Mechanics of the International Society for Rock Mechanics, ISRM 2011
CountryChina
CityBeijing
Period11/10/1811/10/21

Keywords

  • Lab testing
  • Numerical modelling
  • Physical modelling
  • Rock failure
  • Rock properties

ASJC Scopus subject areas

  • Geology
  • Geotechnical Engineering and Engineering Geology

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