Comparative Analysis of Thermomechanical Properties and Thermal Damage Constitutive Models of Three Soft Sedimentary Rocks

Table 2

The ratio of E′, F′, and m' at test temperature to room temperature.

Lithology	T (°C)	E' (MPa)	F' (10^–3)	m'	E'/E0	F'/F0	m'/m0
Sandstone	25	2.759	0.0131	1	1	1	2.759
	30	2.459	0.0118	1.078	0.9017	0.891	2.459
	35	2.228	0.0129	1.004	0.986	0.807	2.228
	40	2.467	0.0129	0.928	0.987	0.894	2.467
	45	3.138	0.0132	0.832	1.011	1.137	3.138
	50	2.791	0.0109	0.994	0.831	1.011	2.791
	55	2.618	0.0127	0.844	0.971	0.949	2.618
Sandy mudstone	25	2.963	12.433	1.892	1	1	1
	30	2.848	11.128	2.098	0.961	0.895	1.109
	35	2.846	10.4862	2.275	0.961	0.843	1.202
	40	2.662	10.552	1.706	0.898	0.849	0.902
	45	2.422	10.167	2.754	0.817	0.818	1.456
	50	2.531	6.130	2.041	0.854	0.493	1.079
	55	2.334	9.626	3.236	0.788	0.774	1.710
Mudstone	25	1990	0.014544	2.2286	1	1	1
	30	1674	0.015639	4.171146	0.841206	1.075289	1.871644
	35	1771	0.012762	3.720534	0.88995	0.877475	1.669449
	40	1824	0.013962	3.924301	0.916583	0.959983	1.760882
	45	1452	0.010854	11.19127	0.729648	0.746287	5.021659
	50	1445	0.013778	4.91244	0.726466	0.947332	2.204272
	55	1480	0.007929	32.26359	0.743719	0.545173	14.47707