Study of Post-Peak Strain Softening Mechanical Behaviour of Rock Material Based on Hoek–Brown Criterion

Table 1

Data of the Hawkesbury sandstone in triaxial compression tests.

Confining pressure (MPa)	At the peak			At the starting point of the residual stage
	(10^−3)	(Mpa)	(°)	(10^−3)	(Mpa)	(°)
2	5.5	5.66	31.9	6.3	0.79	32.7
5	6.5	6.46	27.4	8.0	1.74	28.7
8	7.7	10.28	19.2	9.0	4.89	21.5
12	8.8	12.19	14.2	10.0	7.05	15.3
18	12.3	14.17	9.6	13	8.61	9.9