Modeling anisotropy of clays at critical state

Recent developments related to cam-clay models are summarized, and a different approach to interpret these developments in terms of physical parameters of clays is presented. A new state variable, i), indicative of the fabric of clays, is introduced. Based on these concepts and a general failure criterion, a simple model to predict failure parameters of anisotropic clays for many commonly encountered stress paths is developed. The model capability to interpret in situ strength measured under a given stress path and transfer it to another stress path is illustrated. Finally, the ability to obtain failure parameters for any stress path using data from a single CIUC test is demonstrated