Modeling of brittle rock failure considering inter- and intra-grain contact failures

Based on a two-scale tessellation technique in Neper, a 3DEC-GBM modeling approach considering inter- and intra-grain contact failures is proposed to study brittle rock failure. Plane strain problems are solved using 3DEC to reduce computation time. A parametric study of inter- and intra-grain conta...

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Bibliographic Details
Published inComputers and geotechnics Vol. 101; pp. 224 - 244
Main Authors Wang, Xin, Cai, Ming
Format Journal Article
LanguageEnglish
Published New York Elsevier Ltd 01.09.2018
Elsevier BV
Subjects
Brittle rock failure
Brittleness
Computation
Contact strength heterogeneity
Failure
Failures
Grain
Grain-based model
Granular materials
Heterogeneity
Inter-grain
Intra-grain
Mechanical properties
Microcracks
Modelling
Plane strain
Rocks
Strain
Tessellation
Intra-grain
Brittle rock failure
Grain-based model
Inter-grain
Contact strength heterogeneity
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Summary:Based on a two-scale tessellation technique in Neper, a 3DEC-GBM modeling approach considering inter- and intra-grain contact failures is proposed to study brittle rock failure. Plane strain problems are solved using 3DEC to reduce computation time. A parametric study of inter- and intra-grain contact properties is conducted and a calibration procedure is suggested for determining micro-mechanical properties of granular materials. The modeling results indicate that inter- and intra-grain contact strength heterogeneity affects not only the peak strength of rock but also the microcrack spatial location and hence the fracture development path and fracture pattern.
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ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2018.04.016