Table 1 \(\sigma _{3}- \sigma _{2} -\sigma _{1}\) experiment unloading rate.(MPa/s).
From: Effect of true triaxial principal stress unloading rate on strain energy density of sandstone
Sample | \(\sigma _{3}\) | \(\sigma _{2}\) | \(\sigma _{1}\) |
|---|---|---|---|
\(S_{1} \) | 0.1 | 0.1 | 0.1 |
\(S_{2} \) | 0.5 | 0.5 | 0.5 |
\(S_{3} \) | 1.0 | 1.0 | 1.0 |
\(S_{4} \) | 1.5 | 1.5 | 1.5 |
\(S_{5} \) | 2.0 | 2.0 | 2.0 |
