An experimental study of clay based on a class of simple hypoelastic constitutive behavior

摘要

The objective of this paper is to present a mathematically simple model to define the mechanical behavior of clay that can be utilized in determination of practical solutions for soil mechanics problems. Variable moduli models in the form of tangential stress-strain relationships according to the theory of hypoelsticity are used in this paper. The incremental constitutive relations are formulated directly based on the isotropic linear elastic formulation simply by replacing the elastic constants with variable tangential moduli which are functions of strain invariants. By examining an experimental stress-strain curve of a triaxial compression test, it has been demonstrated that the variable moduli, in this case, is a decreasing function of strain which starts at an initial value of E_0 and gradually reduces to zero at the ultimate deviator stress application. The stress-strain relationship, in this case, can be reduced to a simple hyperbolic from.