Mineral grains serve as the basic units of rocks. Understanding rock materials at the grain-
scale level allows us to unveil the underlying fundamental mechanisms, thereby facilitating …

Mineral grain size heterogeneity is one of the fundamental reasons leading to differences in
rock mechanical behaviours. Several indices have been proposed to quantify grain size …

Brittleness has a significant influence on rock failure under compression; however, the
mechanism is rarely comprehensively discussed. This study numerically investigates the …

This paper describes the implementation and advantages of grain based modelling (GBM)
in the combined finite-discrete element method (FDEM) to study the mechanical behaviour …

A grain-based model (GBM) is generally employed by many researchers to simulate the
microcracking process of crystalline brittle rock by the distinct element method. In this study …

A particle-based discrete element model combined with digital image processing to take into
account the grain geometry and size distribution is used to investigate the mechanical and …

Rock cracking is of key concern to many geological applications. On a grain scale, rock
fracturing depends on not only the external load but also the mechanical properties of the …

In this study, a new calibration procedure was proposed to calibrate the micro-parameters
for the flat-joint model. Both uniaxial compression and Brazilian test simulations were …

Mechanical properties of crystalline rock are greatly affected by its micro-structures which
are characterized as highly-interlocked polygon grains and presence of micro-defects. Due …

The existence of micro cracks inside rocks influences the rock strength and deformation
significantly and controls the presence of crack closure stage under compression. However …