A new method to analyze the influence of principal stress axes rotation on the stress-strain relation of soils

The coefficients of general elastoplastic models of soils are always determined by conventional triaxial tests In this paper,the shortcoming of this methods is analyzed and a more general elastoplastic incremental stress strain relation model of soils are provided Based on the decomposition of stress increment,the computing method of the elastoplastic deformation caused by pure principal stress axes rotation is presented in detail The computed results coincide with the relevant experiment qualitatively