Damage Evolution of Granite under Ultrasonic Vibration with Different Amplitudes

Table 1

Micro-parameters of granite model.

Property	Quartz	Mica	Plagioclase	Alkali feldspar
Particle
Density (kg/m^3)	2650	2800	2630	2630
Linear model
Effective modulus (GPa)	10	10	10	10
Normal critical damping ratio	0.5	0.5	0.5	0.5
LPB model
Effective modulus (GPa)	60	20	40	35
Normal-to-shear stiffness ratio	2.5	2.5	2.5	2.5
Friction coefficient	0.6	0.6	0.6	0.6
Bond effective modulus (GPa)	60	20	40	35
Bond normal-to-shear stiffness ratio	2.5	2.5	2.5	2.5
Tensile strength (MPa)	500	300	400	400
Cohesion (kN)	1000	600	800	800
Friction angle (°)	35	25	30	30
SJ model
Normal stiffness (GPa)	0.6 ×	0.6 ×	0.6 ×	0.6 ×
Shear stiffness (GPa)	0.6 ×	0.6 ×	0.6 ×	0.6 ×
Tensile strength (MPa)	12	12	12	12
Cohesion (kN)	120	120	120	120
Joint friction angle (°)	30	30	30	30