Figure 1
Variability of Drucker-Prager shear strength vs. Mohr-Coulomb shear strength with respect to Lode angles θ0 and θ and the friction angle ϕ. The qDP=qMC line represents the equivalent friction angles for the case of the DP criterion.
Table 1
Expressions for coefficient A and its minimum, maximum and average values for the selected values of θ0 parameter.
| θ0 [°] | A | Amin | Amax | A = 1 |
|---|---|---|---|---|
| -30 | 0.6 | 1.15 | 0.927 | |
| 0 | 0.67 | 1.22 | 0.969 | |
| 30 | 1.0 | 3.0 | 1.49 | |
| 0.6 | 1.0 | 0.897 | ||
| 4.22 | 0.7 | 1.3 | 1 | |
| -19.35 | 0.61 | 1.06 | 0.909 |
Figure 2
Deviation of coefficient A from unity for selected θ0 values with respect to Lode angle θ and friction angle ϕ.
Figure 3
Integral with respect to the θ0 angle for different integration areas Ω.