The aim of this paper is numerical analysis of the coupled hydro-thermo-mechanical (HTM) behavior of soils, considered as deformable multiphase porous materials. A fully coupled finite element model for non-isothermal elasto-plastic multiphase materials based on Porous Media Mechanics was therefore developed. In particular, the ACMEG-TS thermo-elastoplastic constitutive model for variably saturated clayey soils was implemented in the finite element COMES-GEO code for analysis of non-isothermal deformable multiphase porous materials. Numerical validation of the implemented model was carried out with selected simulations of various HTM loading paths. A case of non-isothermal consolidation of a soil column and the first results of the HTM behavior of a deep nuclear waste disposal site in case of failure of canisters are also shown.
Finite element modelling of thermo-elasto-plastic multiphase porous materials
SANAVIA, LORENZO
;LUISON, LORIS;PASSAROTTO, MAREVA;
2012
Abstract
The aim of this paper is numerical analysis of the coupled hydro-thermo-mechanical (HTM) behavior of soils, considered as deformable multiphase porous materials. A fully coupled finite element model for non-isothermal elasto-plastic multiphase materials based on Porous Media Mechanics was therefore developed. In particular, the ACMEG-TS thermo-elastoplastic constitutive model for variably saturated clayey soils was implemented in the finite element COMES-GEO code for analysis of non-isothermal deformable multiphase porous materials. Numerical validation of the implemented model was carried out with selected simulations of various HTM loading paths. A case of non-isothermal consolidation of a soil column and the first results of the HTM behavior of a deep nuclear waste disposal site in case of failure of canisters are also shown.
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