Discrete Element Modeling of Crack Initiation Stress of Marble Based on Griffith’s Strength Theory

Table 2

Mesoscopic parameters of marble.

Mesoscopic parameters	Value
Minimum particle size, Rmin (mm)	0.5
Particle size ratio, Rmin/Rmax	1.66
Density, ρ (kg/m^3)	2700
Particle-contact Young’ modulus, Ec (GPa)	50
Particle-contact stiffness ratio, kn/ks	2
Friction coefficient, μ	0.7
Parallel-bond Young’s modulus, Ecb (GPa)	50
Parallel-bond stiffness ratio, knb/ksb	2
Parallel-bond normal strength, σc (MPa)	45.5 ± 4.2
Parallel-bond shear strength, τc (MPa)	45.5 ± 3.8