Journal
ENGINEERING FRACTURE MECHANICS
Volume 147, Issue -, Pages 261-275Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2015.09.008
Keywords
Discrete element modeling (DEM); Grain based modeling (GBM); Compression tests; Granites
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Funding
- Alberta and German Government
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The influence of mineral size and distribution, and model discretization on elastic rock properties, rock strength, and types and numbers of micro cracks was studied numerically using a two-dimensional discrete element grain based modeling (GBM) approach. The model was calibrated to unconfined and confined compression tests and Brazilian tensile tests performed on Aue granite. Confined asymmetric compression tests were simulated for the same rock and compared to physical fracture paths. The GBM approach is able to reproduce all major laboratory observations including the correct ratio between compression strength and Brazilian tensile strength that cannot be captured with earlier contact models. (C) 2015 Elsevier Ltd. All rights reserved.
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