Mohr - Coulomb
The shear strength τ [kPa] according to Mohr-Coulomb is given by the equation:
where: | N | - | normal force acting on the slip surface |
l | - | length of the slip surface | |
c | - | cohesion of rock on the slip surface | |
φ | - | angle of internal friction of rock on the slip surface |
Approximate ranges of parameters of the Mohr-Coulomb failure criterion for selected soils are given here.