Constitutive models based on the multilaminate framework provide an alternative framework to more common formulations in terms of stress invariants. The basic feature of multilaminate models, namely the consideration of various... more
Constitutive models based on the multilaminate framework provide an alternative framework to more common formulations in terms of stress invariants. The basic feature of multilaminate models, namely the consideration of various integration planes to formulate the stress-strain relationship has the advantage that yield criteria, flow and hardening rules are formulated on planes rather than in three-dimensional stress space making the mathematics simpler. Stress or strain induced anisotropy is an intrinsic feature of these models and inherent anisotropy can be introduced by means of a structural tensor which allows the input of orientation dependent strength properties. A number of different constitutive equations for modelling clays and sands based on the multilaminate framework have been presented in the literature and more recently advanced formulations including small strain stiffness effects or non-local softening behaviour have been developed. In this paper only a very brief sum...
