Experimental Study on Compression and Torsion Fracture within 3D Printed Cementation-Weak and Porosity-High Sandstones

Figure 12

Principal stress and its orientation under cell pressures of (a) 0.0 MPa, (b) 0.02 MPa, (c) 0.5 MPa, and (d) 2.0 MPa.

(a)

(b)

(c)

(d)