Study on Dynamic Mechanical Properties and Failure Mechanism of Sandstones under Real-Time High Temperature

Table 2

Parameters of sandstone mechanical properties under different conditions.

Temperature (°C)	Air pressure (MPa)	Loading speed (m/s)	Strain rate (s^-1)	Dynamic peak stress (MPa)	Dynamic peak strain (10^-3)	Dynamic elastic modulus (GPa)
25	0.3	5.6	60.12	63.22	5.145	25.51
	0.4	6.6	81.52	67.58	5.301	25.87
	0.5	7.6	112.60	74.16	5.822	26.26
	0.6	8.6	153.22	78.45	7.127	23.24
	0.7	9.6	187.85	83.94	7.308	28.12
100	0.3	5.6	78.15	65.55	7.158	18.05
	0.4	6.6	105.01	66.72	7.512	18.18
	0.5	7.6	141.44	74.82	8.932	16.58
	0.6	8.6	174.49	81.12	9.783	15.60
	0.7	9.6	195.01	91.57	9.840	20.13
200	0.3	5.6	82.23	80.29	8.648	14.23
	0.4	6.6	106.81	87.09	9.217	14.35
	0.5	7.6	147.20	93.21	9.567	19.95
	0.6	8.6	188.62	99.55	10.223	21.24
	0.7	9.6	204.14	105.16	11.160	21.21
400	0.3	5.6	96.31	92.70	10.403	14.45
	0.4	6.6	115.87	99.97	10.550	17.24
	0.5	7.6	159.94	108.22	10.976	17.47
	0.6	8.6	186.05	115.71	11.400	19.15
	0.7	9.6	200.74	118.45	11.644	19.38
600	0.3	5.6	110.40	80.18	11.222	16.20
	0.4	6.6	149.17	85.34	12.520	12.17
	0.5	7.6	189.31	98.23	12.750	15.01
	0.6	8.6	202.68	104.70	13.311	18.09
	0.7	9.6	214.83	108.08	14.651	14.28
800	0.3	5.6	112.86	60.31	14.945	6.52
	0.4	6.6	138.62	66.23	15.708	9.29
	0.5	7.6	169.44	76.79	16.366	12.63
	0.6	8.6	198.01	82.03	17.580	11.48
	0.7	9.6	227.74	88.88	18.919	9.80