Analysis of Stress Path Dependent Behaviors of Sand by an Incremental Stress-Strain Equation

Abstract

The strain increments of the incremental equation presented are composed of one part due to the mean principal stress increment and another due to the deviator stress increment. Therefore, the incremental equation must be examined to see whether it can estimate the strain behaviors. depending on the stress path that the mean principal stress and the deviator stress change coincidently or not. For the stress path with a constant lateral pressure, the measured strains are well explained by those calculated. For the stress path with constant principal stress ratios, the measured volumetric strains changing linearly to axial strain are also estimated by those calculated. The measured strains induced by changing the stresses from one state of stress to another depend not only on the end point but also on the stress path. This experimental fact is well represented by the calculation.