Titlebook: Constitutive Modelling of Granular Materials; Dimitrios Kolymbas Book 2000 Springer-Verlag Berlin Heidelberg 2000 Constitutive.bifurcation

Congruous

Discrete and continuum modelling of granular materials between Cosserat and director models is pointed out. A symbolic solution in the form of a finite element based, particle in cell formulation is also presented. The theories and methods are illustrated by examples such as silo flow, settlement of oriented particles, and trapdoor problems. The direct

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contrast-medium

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On the physical background of soil strengthcs of granular matter and colloids does not (yet?) offer a substitute. Steady states are first discussed in detail, in particular critical states. They can develop asymptotically only under special granulometric, initial and boundary conditions so that the methods of ideal plasticity are not justifi

ADAGE

The influence of time derivative terms on the mechanical behaviour of loose sands saturated and dry sand specimens are tested. The experimental triaxial tests considered are characterised by finite load increments and may be interpreted as creep tests. Even though the axial load is kept constant with time, when collapse takes place, axial strain rate continuously increases. A th

dragon

An approach to plasticity based on generalised thermodynamicshese problems provide the motivation for an alternative formulation, based on thermomechanical principles. In this formulation, a constitutive model is defined solely by specification of two thermodynamic potentials: an energy function and a dissipation function (or a yield function). Incremental re

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Hypoplastic and elastoplastic modelling — a comparison with test dataformance of two entirely different constitutive models: an elastoplastic and a hypoplastic model. On considering input parameters and formulations one might expect completely different stress-strain behaviour. But from the present study it will appear that model performances in relation to real soil

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Strain response envelope: a complementary tool for evaluating hypoplastic constitutive equations- ial plane. Due to the lack of experimental data, this technique is used numerically mostly to check and classify constitutive models. This paper proposes a critical review of different representations involved in the development of hypoplastic constitutive equations. The evaluation is based on thr

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