Study of Frozen Soil Creep Damage-Coupling Constitutive Function

Based on frozen soil experiments and Nishihara Model,The D-P yield standard is used to determine the damage variables of frozen soil;The constitutive relationship of the viscoelastic plastic damage-coupling constitutive function in association with plastic flow law is deduced.The viscoelastic plastic damage-coupling constitutive model for geo-materials is embedded into the commercial FEM software ADINA as a user's subroutine.Comparing the final fitting curves of the triaxial stress creep experiments and the theory calculation indicate that the theoretical result coincides with the experimental ones very well.The model is available for the non-linear accelerative creep of frozen soil.