Development of a Nonlinear Elastoplastic Soil Material Model of Nash.Soil with Hardening and Softening

A brief description is presented of the NASH.Soil mathematical model created by the authors for numerical modeling of the behavior of soils in solving problems in the “structure-foundation” system. A smooth capped Mohr – Coulomb surface is used as the yield surface. The model implements “double” hardening and softening, and the dependence of the rigidity against all-sides compression. All base input parameters of NASH.Soil model are unified with the Hardening Soil model. Verification of the created model with experimental data is given.