Research Article
Improved Nonlinear Nishihara Shear Creep Model with Variable Parameters for Rock-Like Materials
Figure 6
Deformation modulus-time diagrams under different normal stresses: (a) 0.78 MPa, (b) 1.56 MPa, (c) 2.34 MPa, and (d) 3.12 MPa.
(a) |
(b) |
(c) |
(d) |