Research Article
Experimental Study on Failure Law and Mechanism of Red Sandstone under Ultrasonic Vibration Excitation
Table 4
Microscopic parameter values.
| | Microscopic parameter | Microscopic parameter values |
| | Minimum particle radius (mm) | 0.15 | | Maximum particle radius (mm) | 0.3 | | Density (kg/m3) | 2700 | | Particle normal/tangential stiffness ratio | 1 | | Particle friction coefficient | 0.45 | | Parallel bond modulus (GPa) | 1.7 | | Normal strength of parallel bond (MPa) | 31 | | Tangential strength of parallel bond (MPa) | 39 |
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