Study on the Microscale Tensile Properties of Lower Cambrian Niutitang Formation Shale Based on Digital Images

Table 4

AE energy and fractal dimension values.

Stress level
	10%	20%	30%	40%	50%	60%	70%	80%	90%	100%
0° AE	0	0	0	0.12	0.62	1.47	2.95	5.17	8.13	15.06
D	0	0	0	0.6691	0.7865	1.115	1.241	1.357	1.464	1.57
15° AE	0	0	0	0.12	0.69	1.55	3.04	5.25	8.86	15.28
D	0	0	0	0.6806	0.944	1.15	1.289	1.3721	1.481	1.585
30° AE	0	0	0	0.18	0.63	1.44	2.64	4.53	7.71	12.58
D	0	0	0	0.692	0.9193	1.087	1.2133	1.328	1.4391	1.536
45° AE	0	0	0	0.04	0.28	1.01	1.91	3.38	5.8	9.31
D	0	0	0	0.4758	0.7755	1.02	1.1472	1.266	1.382	1.477
60° AE	0	0	0	0.03	0.24	0.71	1.6	2.83	5.14	8.82
D	0	0	0.3531	0.4108	0.7413	0.9559	1.122	1.238	1.347	1.464
75° AE	0	0	0	0	0.1	0.31	0.9	1.83	3.21	5.47
D	0	0	0	0	0.6303	0.8403	1.005	1.151	1.262	1.371
90° AE	0	0	0	0	0.09	0.37	0.96	1.57	2.76	5.36
D	0	0	0	0	0.602	0.8315	1.021	1.116	1.231	1.354