Effect of Hydrothermal Coupling on Physical and Dynamic Mechanical Properties of Sandstone

Table 2

Test results on the basic dynamic properties of sandstone after H-C cycles.

Test number	Number of sample groups	Cycling number	Peak stress (MPa)	Elastic modulus (GPa)	Relative elastic modulus (Kr)
1	Room temperature	0	143.17	28.8	1.000
2	Low temperature (L-T) group	10	139.59	25.6	0.889
3		20	120.32	19.8	0.688
4		30	109.06	19.2	0.667
5		40	103.80	19.0	0.660
6	Moderate temperature (M-T) group	10	123.61	22.4	0.778
7		20	104.73	15.2	0.528
8		30	97.96	15.5	0.538
9		40	96.30	11.3	0.392
10	High temperature (H-T) group	4	64.38	15.8	0.549
11		8	51.43	8.6	0.297
12		12	42.11	6.6	0.230