A non-uniqueness study for a hydromechanical boundary value problem is performed. A fully saturated porous medium is considered using an elasto-plastic constitutive equations to describe the mechanical behavior of the skeleton. A real hydromechanical experiment which consists in a hollow cylinder test on a Boom Clay sample is modelled. It is shown that the time step discretisation of the numerical problem has an effect on the initialisation of the Newton-Raphson algorithm on a given time step. Different solutions for the same initial boundary value problem can consequently be found.
Hydromechanical modelling of an initial boundary value problem: Studies of non-uniqueness with a second gradient continuum / Marinelli, F.; Sieffert, Y.; Chambon, R.. - none:(2015), pp. 47-52. (Intervento presentato al convegno 10th International Workshop on Bifurcation and Degradation in Geomaterials, IWBDG 2014 tenutosi a hkg nel 2014) [10.1007/978-3-319-13506-9_8].
Hydromechanical modelling of an initial boundary value problem: Studies of non-uniqueness with a second gradient continuum
Marinelli F.
;
2015
Abstract
A non-uniqueness study for a hydromechanical boundary value problem is performed. A fully saturated porous medium is considered using an elasto-plastic constitutive equations to describe the mechanical behavior of the skeleton. A real hydromechanical experiment which consists in a hollow cylinder test on a Boom Clay sample is modelled. It is shown that the time step discretisation of the numerical problem has an effect on the initialisation of the Newton-Raphson algorithm on a given time step. Different solutions for the same initial boundary value problem can consequently be found.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
