Experimental Investigation of Sandstone under Cyclic Loading: Damage Assessment Using Ultrasonic Wave Velocities and Changes in Elastic Modulus

Table 3

Dissipated energy for sandstone specimens under Type 2 cyclic loading tests in J/m³.

Number of cycles	Number of specimens
	#1	#2	#3
1	6.49 × 10^4	8.69 × 10^4	9.30 × 10^4
2	6.33 × 10^4	7.55 × 10^4	7.93 × 10^4