Determining Tensile Strength of Rock by the Direct Tensile, Brazilian Splitting, and Three-Point Bending Methods: A Comparative Study

Table 7

Mesomechanical parameters of the parallel bonded particle model.

Lithology	Rmin (mm)	Rmax (mm)	ρ (kg·m^−3)	μ	E^∗ (GPa)	kr	(GPa)	λ	n	MPa	MPa	(°)
Granite	0.8	1.33	2.619	0.5	42	1	42	1	0.36	8.7	37	20
Marble	0.8	1.33	2.835	0.5	88.16	1	88.16	1	0.36	19	15	20
Diabase	0.8	1.33	2.144	0.5	49	1	49	1	0.36	12	10	20

Note. R_min is the minimum particle radius, R_max is the max particle radius, ρ is the particle bulk density, n is the porosity, μ is the friction coefficient, λ is the radius multiplier, is the parallel bond Young’s modulus, is the particle contact Young’s modulus, k_r is the ratio of stiffness, is the parallel bond tensile strength, is the parallel bond cohesion, and is the friction angle.