Research Article

Brittleness Evaluation of Shale Based on the Brazilian Splitting Test

Table 4

Values of PFC simulation parameters.

Model diameter
(mm)
Minimum particle radius
(mm)
Ratio between the maximum and minimum particle radius
Normal stiffness coefficient
Internal stress
(MPa)
Minimum number of free particles
Percentage of free particles Particle density ρ (kg/m3)Connection modulus between particles
(GPa)
Ratio between normal and tangential stiffness
Friction factor between particles
Average of normal connection strength
(MPa)
Standard deviation of normal connection strength
(MPa)
Average of tangential connection strength
(MPa)
Standard deviation of tangential connection strength
(MPa)

250.455.781.1−1.03019208.242.50.8150.510.5