Analysis of Three-Dimensional Damage Constitutive Model of Frozen Sand Based on the Influence of Intermediate Principal Stress and Temperature

Table 2

Correlation coefficients of experimental and theoretical curves at different temperatures and intermediate principal stress coefficients.

T (°C)	−5	−5	−5	−5	−10	−10	−10	−10	−15	−15	−15	−15
b	0	0.25	0.5	0.75	0	0.25	0.5	0.75	0	0.25	0.5	0.75
R^2	0.97	0.96	0.99	0.98	0.98	0.97	0.99	0.96	0.98	0.94	0.99	0.94

R² in this table represents the correlation coefficient.