Multiaxial Cyclic Plasticity Model for Clays
Authors:
- 1 June 1994
- journal article
- Published by American Society of Civil Engineers (ASCE) in Journal of Geotechnical Engineering
- Vol. 120 (6) , 1051-1070
Abstract
A total stress‐based bounding surface plasticity model for clays is developed to accommodate multiaxial stress reversals. The model is constructed based on the idea of a vanishing elastic region undergoing pure translation inside a bounding surface, and an interpolation function for hardening modulus which varies with stress distance of the elastic region from the unloading point. Central to the development of the model are the general criteria for loading and unloading, which are phrased based upon the simple argument that with continued loading the hardening modulus should decrease monotonically with deformation. Combined with numerical integration of the elastoplastic constitutive equations in a form suitable for a robust computer implementation, the model is applied to cohesive soils undergoing undrained stress reversals and cyclic loading. With a suitable choice of the interpolation function for the hardening modulus, it is shown that existing one‐dimensional nonlinear laws for soils can be replicate...Keywords
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