ABSTRACT
It has been shown experimentally that non-coaxiality, non-coincidence of principal plastic strain increments and principal stress directions, is originated from soil microstructure fabric anisotropy. Herein, considering soil fabric-loading interaction effects on dilatancy and flow of sands, partially, a constitutive model is developed to predict, mainly, these aspects of sand behavior. It is shown that the model predictions are in well agreement with observed behavior of real sands under rotation of principal stress axes in hollow cylindrical cell.
