Mechanical Behavior and Fracture Evolution Mechanism of Composite Rock Under Triaxial Compression: Insights from Three-Dimensional DEM Modeling
نویسندگان
چکیده
Existing studies on transversely isotropic rock formations, a special geology, have mainly focused its mechanical characteristics; whereas, investigations fracture process and damage microscopic mechanisms are relatively limited. To remedy this deficiency, in study, three-dimensional numerical model is established using discrete elements (PFC3D), focusing the effects of confining pressure (0, 5, 10, 15, 20 MPa) laminar inclination angle (θ0°, θ15°, θ30°, θ45°, θ60°, θ75°, θ90°) failure behavior composite rock. demonstrate accuracy simulations, stress–strain curves ultimate modes obtained from simulations were compared with previous laboratory test results X-ray CT images. Numerical models smooth-joint contact shown to simulate reasonably well. simulation indicate that significantly influence internal crack evolution patterns specimen. The cracks change concentrated distribution as increases. specimens θ0° θ90° emerges soft eventually extends hard rock, while inclined face finally spread matrix, which can be explained by graph increasing number cracks. In addition, principal stress tangential rocks monitored arranging measurement circles, it was found stresses essential cause difference between two types.
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ژورنال
عنوان ژورنال: Rock Mechanics and Rock Engineering
سال: 2023
ISSN: ['0723-2632', '1434-453X']
DOI: https://doi.org/10.1007/s00603-023-03443-8