A Rheological Model of Sandstones considering Response to Thermal Treatment

Table 2

Parameters of the developed rheological model and the existing models.

Model	Deviatoric stress (MPa)	(GPa)	(GPa)	(GPa)	(GPa·h)	(GPa·h)	(GPa·h)
The developed model	40	39.6	66.63	N/A	58.15	N/A	N/A	N/A	0.86
	75	40.98	28.83	N/A	1.11	N/A	N/A	N/A	0.83
	110	39.86	33.82	N/A	7.889	N/A	N/A	N/A	0.85
	145	41.19	44.81	7.48	2.27	20.36	N/A	N/A	0.99
	175	42.17	147.58	13.38	40.24	33.096	N/A	N/A	0.99
	175	42.17	147.58	13.38	40.24	33.09	16.24	13.96	0.99
Kelvin–Voigt model	175	42.17	25.24	N/A	130.75	N/A	N/A	N/A	0.72
Burgers model	175	42.17	80.58	N/A	42.03	1500.49	N/A	N/A	0.78
Nishihara model	175	42.17	80.41	N/A	35.11	257.68	N/A	N/A	0.81

N/A: not applicable; during the acceleration rheological stage.