Table 3 \(\sigma _{3} -\sigma _{2} \sigma _{1}\) experiment unloading rate.(MPa/s).
From: Effect of true triaxial principal stress unloading rate on strain energy density of sandstone
Sample | \(\sigma _{3}\) | \(\sigma _{2}\) | \(\sigma _{1}\) |
|---|---|---|---|
\(Y_{1} \) | 0.1 | 0.15 | 0.2 |
\(Y_{2} \) | 0.5 | 0.15 | 0.2 |
\(Y_{3} \) | 1.0 | 0.15 | 0.2 |
\(Y_{4} \) | 1.5 | 0.15 | 0.2 |
\(Y_{5} \) | 2.0 | 0.15 | 0.2 |
