A new contact bond model based on the Mohr-Coulomb failure criterion has been implemented in PFC2D to reproduce the behaviour of frictional cohesive (c, φ) geomaterials. According to this model, the bond strength can be clearly divided into two distinct micromechanical contributions: an intergranular friction angle and a cohesive bond force. A parametric analysis has been run to validate the pr...

Internal friction and void ratio will change among granular particles under vibration, and the size of void ratio directly affects strength of granular media. To further study the effect of vibration parameters on granular mechanical properties, discrete element method is used to simulate particles motion in a vibrating rectangular case by PFC2D software and study the influence of vibration fre...

This paper presents studies that focus on fire and explosion-induced damage of tunnel structures by employing the Discrete Element Method (DEM). By assuming a two-dimensional aggregate distribution reconstructing digital representation experimental concrete blocks, numerical model lining was established in PFC2D program. The temperature shock wave pressure at surface were obtained using Fluent ...

Granite is a typical crystalline material, often used as a building material, but also a candidate host rock for the repository of high-level radioactive waste. The petrographic texture-including mineral constituents, grain shape, size, and distribution-controls the fracture initiation, propagation, and coalescence within granitic rocks. In this paper, experimental laboratory tests and numerica...

Discrete granular model in a low stress state as well as retaining homogeneous porosity is the premise and foundation to obtain good results with particle flow method. AutoCAD is used as the processing software in which Polyline is used to render the scope of modeling and the 3dface is used to set delivery area of particles, then the improved expansion-particle method is prepared for generating...

In the study of pre-fabricated single-fissured rock, failure mode, mechanical properties and propagation law rock are affected by length inclination angle fissure. this study, artificially prepared marble-like rocks with different fissure characteristics were used as representatives, using PFC 2D software to establish a uniaxial compression model tests for fissures. The effects lengths angles o...

Slopes are subjected to stress redistributions during underground mining activities, and this may eventually cause deformation or landslide. This paper takes Madaling landslide in Guizhou Province, China as a case study to investigate the failure mechanism and its run-out behaviours by using discrete element method. Previous qualitative analysis indicated that the slope experienced four stages ...