A Time-Dependent Double Hardening Model for Soft Rock

<div>Deviatoric stress versus axial strain (%) for various strain rates under a single confining stress of 10 kPa. (a) Displacement control analysis is done. (b) Displacement control analysis is done in the extension direction (zoomed up fig. of Figure 8(a)).</div>

Advances in Civil Engineering

fig8

Figure 8

Figure 8: A Time-Dependent Double Hardening Model for Soft Rock 