Mechanical Characteristics and Energy Evolution Laws for Red Bed Rock of Badong Formation under Different Stress Paths

Table 7

Energy parameters of rocks under cyclic loading-unloading conditions.

Specimen no.	Energy parameters	Cycle times
		1	2	3	4	5	6	7
b2-4-1	TAE	0.0551	0.0741	0.0954	0.1193	0.1613	0.1896	0.8410
	CDE	0.0021	0.0054	0.0150	0.0227	0.0230	0.0312	0.6312
	CCDE	0.0389	0.0731	0.1571	0.1901	0.1425	0.1646	0.7505
b2-4-2	TAE	0.1032	0.1297	0.1580	0.1888	0.2222	1.4366	—
	CDE	0.0034	0.0082	0.0137	0.0226	0.0351	1.0351	—
	CCDE	0.0334	0.0631	0.0867	0.1198	0.1578	0.7205	—
b2-4-3	TAE	0.5372	0.6017	0.6724	0.7516	0.8444	0.9605	1.0422
	CDE	0.0447	0.0940	0.1545	0.2313	0.3338	0.4803	1.0303
	CCDE	0.0832	0.1561	0.2298	0.3078	0.3953	0.5000	0.9886