Experimental Study on Mechanical Properties of Prefabricated Single-Cracked Red Sandstone under Uniaxial Compression

Figure 13

Relationship between the stress, energy, and the axial strain during loading at various crack dip angles: (a) α = 0°, (b) α = 15°, (c) α = 30°, (d) α = 45°, (e) α = 60°, (f) α = 75°, (g) α = 90°, and (h) intact sample.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)