Visco-Elastoplastic Constitutive Fatigue Model for Rocks

Table 1

NVPFM parameters of red sandstone under 15 MPa confining pressure.

K (MPa)	G1 (MPa)	G2 (MPa)	(MPa·s)	(MPa·s)	(MPa·s^n)		R^2
1.759 × 10^3	3.439 × 10^9	1.070 × 10^4	3.922 × 10^4	2.613 × 10^4	4.788 × 10^4	0.872	0.990