E-Plaxis overview
- UDSM - Hypoplastic model with inter-granular strain
- UDSM - NGI Anisotropic shear strength model
- UDSM - Anisotropic clay models: S-CLAY1 and S-CLAY1S
- UDSM - MIT S1 model
- UDSM - CLoE hypoplastic model
- UDSM - Mixed isotropic-kinematic hardening elastoplastic models for structured clay
- UDSM - Small-strain + MC model
- UDSM - e-ADP Anisotropic strength model
- Mohr-Coulomb
- Soft Soil model
- Hardening Soil model
Hardening Soil model
- Title: Hardening Soil model
The Hardening Soil model is an advanced model for the simulation of soil behaviour. As for the Mohr-Coulomb model, limiting states of stress are described by means of the friction angle phi, de cohesion c and the dilatancy angle psi. However, soil stiffness is described much more accurately by using three different input stiffnesses: the triaxial stiffness E50, the triaxial unloading stiffness Eur and the oedometer loading stiffness Eoed. In contrast to the Mohr-Coulomb model, the Hardening Soil model also accounts for stress-dependency of stiffness moduli. This means that all stiffnesses increase with pressure. Hence, all three input stiffnesses relate to a reference stress, usually taken as 100 kPa (1 Bar).
Besides the model parameters mentioned above, initial soil conditions, such as preconsolidation, play an essential role in most soil deformation problems. This can be taken into account in the initial stress generation.