干旱区生态环境知识资源中心

In this paper, the way of setting up the vehicle structural constitutive model is introduceded. With the desert soil three triaxial test data of rock and soil mechanics, the soil structural quantitative parameter ( strain comprehensive structure potential ) is introduced into the soil strength and deformation characteristics analysis.Under the same confining pressure the stress-strain curves of different water content of sand have the same tendency. Through the method of setting up the Duncan-Chang model,structural constitutive model of sand is constructed and the parameters of the model are obtained by testing. The research can provide reference for vehicles and military vehicles to improve crossing through the desert sand.