Effects of Cyclic Loading on the Mechanical Properties of Mature Bedding Shale

Table 3

Summary of the fatigue test characteristics.

Sample number	The upper limit stress	The lower limit stress	Maximum stress level	Minimum stress level	Amplitude level	Frequency (Hz)	Number of failure cycles
H-1	81.75	16.4	0.95	0.19	0.76	0.5	11
H-5	77.58	21.75	0.9	0.25	0.65	0.5	155
H-6	73.27	28.1	0.85	0.33	0.52	0.5	1856
H-8	68.92	34.13	0.8	0.40	0.40	0.5	5689
V-1	110.64	16.2	0.95	0.14	0.81	0.5	27
V-3	104.85	29.12	0.9	0.25	0.65	0.5	452
V-4	99.02	38.44	0.85	0.33	0.52	0.5	2569
V-10	93.2	47.76	0.8	0.40	0.40	0.5	8956