Abstract
A finite element program with the viscoelactic model of a soil under a loading stress state and the elastic model under an unloading stress state, taking into consideration friction and adhesion between the rigid wheel and soil, was developed to analyze the plastic behavior of soil under a running rigid wheel. The coefficients of viscosity, the bulk moduli and the moduli of rigidity of soil model under a three axial stress state were measured with unconfined compression tests. The soil models were verified by calculations under the loading and unloading stress state. The developed program can estimate the tractive performance of a wheel and the soil compaction under a running wheel.
