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

Table 1

m₀ and F₀ corresponding to different λ values.

Lithology	λ	m0	F0 (10^-3)	σ (MPa)	Average uniaxial compressive strength (MPa)	Selected λ value
Sandstone	1	2.717	0.0134	42.696	44	λ = 0.95
	0.95	2.759	0.0131	42.873
	0.90	2.802	0.0127	42.843
	0.85	2.856	0.0123	42.803
Sandy mudstone	1	1.803	13.634	16.7296	15	λ = 0.90
	0.95	1.843	13.030	16.7200
	0.90	1.892	12.433	16.7143
	0.85	1.953	11.841	16.7179
Mudstone	1	2.229	0.0145	12.8598	13	λ = 0.95
	0.95	2.265	0.0140	12.8966
	0.90	2.308	0.0135	12.8525
	0.85	2.359	0.0137	13.5187