ABSTRACT
In soil mechanics the most frequently used material model, by far, is the Mohr-Coulomb model where the soil strength is represented via the friction angle and the cohesion. The model describes the ultimate strength of soil bodies to a satisfactory degree for design purposes and combined with a linearly elastic model and a non-associated flow rule the deformation behaviour can be estimated reasonably well. Before the use of computers in civil engineering became the norm, a large number of solutions to practical problems was constructed analytically or semianalytically via limit state or limit equilibrium methods.
