Study on Mesoscale Damage Evolution Characteristics of Irregular Sandstone Particles Based on Digital Images and Fractal Theory

Table 2

The fractal dimension value and damage degree of the specimen under different stress conditions.

Stress level
Numerical sample		10%	20%	30%	40%	50%	60%	70%	80%	90%	100%
Without confinement	D	0	0.182	0.416	0.588	0.688	0.837	0.878	0.971	1.063	1.153
	ω	0	0.091	0.226	0.294	0.344	0.419	0.439	0.485	0.532	0.577
With confinement	D	0	0.153	0.288	0.563	0.686	0.860	0.913	0.980	1.070	1.466
	ω	0	0.077	0.144	0.282	0.343	0.430	0.457	0.490	0.535	0.733