Material Behavior
An overview of the properties of the modified Mohr-Coulomb model is provided in the corresponding chapter of Theoretical Background.
Input dialog box
In order to represent the material behavior, the model requires the input of the following parameters.
- φ - Angle of friction
- c - cohesion
- ψ - dilatancy angle
- E - Modulus of elasticity
- ν - Poisson's ratio
The shear strength parameters - angle of friction and cohesion as well as the dilatancy angle of the soil can be entered in the specific input tab for the Mohr-Coulomb model. This is shown in the figure below.
The modulus of elasticity and Poisson's ratio have to be defined in the "General" tab, which is shown in the superordinate chapter Input - Soil Materials.
Additional Notes
to the cohesion
When using numerical methods, such as FEM, in geotechnical engineering, it is recommended to always apply a non-zero cohesion. Therefore, a small cohesion between 0.5 and 1.0 kN/m² can be applied even for non-cohesive soils.
To the dilatancy angle
The following relation can be used for the dilatancy angle. [1]