DBPapers
DOI: 10.5593/sgem2011/s02.131

ON THE CRACK PROPAGATION MECHANISM OF BRITTLE ROCKS UNDER VARIOUS LOADING CONDITIONS

AUTHOR/S: M. F. MARJI, J. GHOLAMNEJAD, M. EGHBAL
Monday 1 August 2011 by Libadmin2011

11th International Multidisciplinary Scientific GeoConference SGEM2011, www.sgem.org, SGEM2011 Conference Proceedings/ ISSN 1314-2704, June 20-25, 2011, Vol. 1, 561-568 pp

ABSTRACT

The crack propagation mechanism of rocks under tensile and compressive loading conditions has been investigated. A higher order indirect boundary element method using special crack tip elements has been used to solve the various example problems in
rock fracture mechanics. It is concluded that the brittle rocks fail due to the mixed mode fracture propagation under both tensile and compressive loading conditions. The microcracks
are initiated due to tensile or tensile and shear under tensile loadings and due to tensile and shear under compressive loadings. The final crack propagation is due to tensile or induced tensile for both loading conditions. Several example problems solved
numerically and the results are compared with both analytical and experimental results.
The results are compared with the corresponding results given in the literature and show
good agreements with the analytical or observed experimental results.

Keywords: Crack Propagation, Mixed Mode Fracture, Tensile and Compressive loadings, Brittle Rocks, Boundary Element Method

PAPER 2011/s02.131: ON THE CRACK PROPAGATION MECHANISM OF BRITTLE ROCKS UNDER VARIOUS LOADING CONDITIONS

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