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

Mohammad Fatehi Marji

First published: 2011-06-20https://doi.org/10.5593/sgem2011/s02.131View metrics

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 micro- cracks are initiated due to tens ile 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.

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Publication details

Title
ON THE CRACK PROPAGATION MECHANISM OF BRITTLE ROCKS UNDER VARIOUS LOADING CONDITIONS
Authors
Mohammad Fatehi Marji
Proceedings
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2011 11th International Multidisciplinary Scientific GeoConference
Publisher
Stef92 Technology
Year
2011
Pages
Not available yet
ISSN
1314-2704
ISBN
Not available yet
Language
en
Publication type
Conference Paper
Keywords
Crack PropagationMixed Mode FractureTensile and Compressive loadingsBrittle RocksBoundary Element Method
References16

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  8. Fatehi Marji M., Hosseini_Nasab, H. and Kohsary A. H., ‘On the Uses of Special Crack Tip Elements in Numerical Ro ck Fracture Mechanics’ ; Int. j. Solids and Structures, Vol. 43, pp. 1669-1692, 2006.

  9. Fatehi Marji, M.; Hosseini-nasab, H. and Kohsary, A. H., "A New Cubic Element Formulation of the Displacement Discontinuity Method using Three Special Crack Tip Elements for Crack Analysis", JP Journal of Solids and Structures, Vol. 1, pp. 61-91, 2007.

  10. Fatehi Marji, M.; Hosseini-nasab, H. and Hosseinmorshedy A, "Numerical Modeling of the Mechanism of Crack Propagation in Rocks Under TBM Disc Cutters", Journal of Mechanics of Material and Structures, Vol. 4, No: 3, 2009.

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