Experimental Study on Failure Law and Mechanism of Red Sandstone under Ultrasonic Vibration Excitation

Table 2

Ultrasonic vibration generation experimental program.

Specimen number	Top load static pressure (MPa)	Excitation time (s)
1	0.02	40
2	0.02	60
3	0.02	80
4	0.02	100
5	0.02	120
6	0.02	140