Research Article
Mechanical Characteristics and Mesostructural Damage of Saturated Limestone under Different Load and Unload Paths
Figure 3
Experimental instrument flowchart. Stress-strain curves of the rock for different loading and unloading methods: (a) = 0.2 mm/min, σ0 = 2.5 MPa; (b) = 0.15 mm/min, σ0 = 2.5 MPa. I, compression stage; II, linear-elastic stage; III, plastic stage; and IV, softening stage.
| (a) |
| (b) |