Mobilized shear strength
Mobilized shear strength variable (in percentages) shows the level of mobilized soil/rock shear strength. If Rmob = 100%, material reached the plastic state – the shear strength is fully mobilized.
The general equation for calculation of Rmob:
where: | Mcur | - | the current mobilized shear strength [-] |
M | - | the shear strength (slope of plasticity/failure surface) [-] |
Determination (calculation) of Mcur and M depends on the adopted constitutive model. Both variables (Mcur a M) are defined in σ‘m-J space (refer to figure below). Such a definitions is suitable for models of the Mohr-Coulomb type. In some cases, however, it appears useful to define Rmob directly in terms of the mobilized angle of internal friction φm. Details can be found in the theoretical manual.
Mobilized shear strength in σ‘m-J space
Simply, for the case of triaxial compression:
Mobilized shear strength in σ‘-τ space