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Abstract (inglese)

A formulation for a partially saturated porous medium undergoing large elastic or elastoplastic deformations is presented. The porous material is treated as a multiphase continuum with the pores of the solid skeleton filled by water and air, this last one at constant pressure. This pressure may either be the atmospheric pressure or the cavitation pressure. The governing equations at macroscopic level are derived in a spatial and a material setting. Solid grains and water are assumed to be incompressible at the microscopic level. The elasto-plastic behaviour of the solid skeleton is described by the multiplicative decomposition of the deformation gradient into an elastic and a plastic part. The effective stress state is limited by the Drucker-Prager yield surface. The water is assumed to
obey Darcy’s law. Numerical examples of the Liakopoulos’ test and of strain localisation of dense and loose sand conclude the paper.

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Tipo di EPrint:Rapporto tecnico
Anno di Pubblicazione:08 Maggio 2001
Informazioni aggiuntive:Manoscritto di partecipazione al Premi E. Stein 2001
Parole chiave (italiano / inglese):Partially saturated porous media, large inelastic strains, finite elements
Settori scientifico-disciplinari MIUR:Area 08 - Ingegneria civile e Architettura > ICAR/08 Scienza delle costruzioni
Struttura di riferimento:Dipartimenti > Dipartimento di Costruzioni e Trasporti
Codice ID:1134
Depositato il:19 Ago 2008
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