The present work discusses a finite-strain plasticity model for soft clays. To motivate such a model, the infinitesimal-strain assumption is shown to be inadequate for the constitutive description of soft clays. Hence, assuming the multiplicative elasto-plastic decomposition of the deformation gradient, a finite-strain Cam-clay model is presented. In particular, with respect to the original Cam-clay formulation, this model improves the description of the isotropic compression behaviour as well as of the elastic shearing response. The constitutive laws are discussed and their implications are pointed out. The physical meaning of the model parameters is carefully addressed. Finally, the ability to properly match some experimental results available in the literature is assessed.
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/S0749-6419(98)00050-3|
|Appare nelle tipologie:||1.1 Articolo in rivista|