New Maxwell Creep Model Based on Fractional and Elastic-Plastic Elements

Table 1

Parameters determined through fitting analysis based on creep tests of rock salt.

New Maxwell creep model	σ (MPa)	E (GPa)	ξ (GPa·h^β)	β	α	σs (MPa)	tF (h)	R^2
	9.93	0.875	4.544	0.260		13.5		0.918
	14.41	0.590	3.662	0.252	0.191	13.5	1056	0.988
	14.72	0.415	3.904	0.241	0.110	13.5	385	0.978
Burgers model	σ (MPa)	EH (GPa)	EK (GPa)	ηK (GPa·h)	η (GPa·h)	R^2
	9.93	0.860	0.931	3446.914	63.999	0.993
	14.41	0.568	1.271	541.794	30.426	0.968
	14.72	0.410	2.222	18.242	221.010	0.901
Nishihara model	σ (MPa)	EH (GPa)	EK (GPa)	ηK (GPa·h)	ηS (GPa·h)	σs (MPa)	R^2
	9.93	0.829	0.820	79.527		13.5	0.975
	14.41	0.568	1.271	30.425	34.214	13.5	0.968
	14.72	0.410	2.222	18.242	18.317	13.5	0.901