TY - JOUR
TI - Study on the mesoscopic failure process of heterogeneous rock based on the 3-D GBM model
AU - Zhu Kai-Peng
JN - Thermal Science
PY - 2025
VL - 29
IS - 2
SP - 1071
EP - 1075
PT - Article
AB - The rock deformation and failure processes under uniaxial compression are a  fundamental issue in rock mechanics. This study constructs a numerical  heterogeneous rock specimen composed of Voronoi polyhedral particles using  Neper software. It examines the fracture patterns, mechanical behavior, and  strength of granular rock through numerical simulations using the 3-D  distinct element code. The findings demonstrated that the number of cracks  escalates with increasing axial stress. The rate of crack initiation rises  significantly when the axial stress is approximately 57.3% of the peak  stress, and shear cracks start to appear when the axial stress reaches  73.84% of the peak stress. These heterogeneous rock specimens exhibit  significant axial splitting damage under uniaxial compression,  transitioning from tensile to shear failure as the axial stress improves.  In addition, smaller internal friction angles lead to more severe failures,  and the more fully developed the shear zones are, the more pronounced the  rock mass’s zonal fracturing becomes.