Mechanical Characteristics and Mesostructural Damage of Saturated Limestone under Different Load and Unload Paths

Table 3

Basic parameters of rock samples.

Loading rate v/(mm/min)	Compressive strength (σc/MPa)	Elastic modulus (Ee/GPa)	Maximum plastic strain for the whole test (εmax)	Residual stress (σr/MPa)
0.15	26.36	3.97	0.00491	15.22
0.2	24.81	3.15	0.01548	9.87
0.3	23.94	1.58	0.02040	6.19
Average value	25.03	2.90	0.01360	10.43