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Mobilized strength

Mobilized 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.

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 variable(Mcur a M) are defined in σ‘m-J space (refer to picture below).

Mobilized shear strength in σ‘m-J space

Simply, for case of 3ax compression:

Mobilized shear strength in σ‘-τ space

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