Research Article
The Effect of Confining Pressure and Water Content on Energy Evolution Characteristics of Sandstone under Stepwise Loading and Unloading
Figure 2
Stress-strain curves of the samples with different water contents under loading and unloading conditions: (a) 0%, (b) 25%, (c) 50%, and (d) 100%.
(a) |
(b) |
(c) |
(d) |