Personne
Bertrand François
Cette personne n’est plus à l’EPFL
Publications associées (35)
Behaviour of an engineered clay barrier for A nuclear waste isolation system
Lyesse Laloui, Bertrand François
In a few years, safe and definitive solutions should be ready to manage large quantities of high-level radioactive waste. Deep geological repository involving a multi-barrier system constitutes one of the most promising options to isolate such waste from t ...
CIMNE2009Behaviour of an engineered clay barrier for a nuclear waste isolation system
Lyesse Laloui, Bertrand François
In a few years, safe and definitive solutions should be ready to manage large quantities of high-level radioactive waste. Deep geological repository involving a multibarrier system constitutes one of the most promising options to isolate such waste from th ...
INTERNATIONAL CENTRE FOR COMPUTATIONAL ENGINEERING (IC 2E)2009Finite element modelling of thermo-elasto-plastic water saturated porous materials
Lyesse Laloui, Bertrand François
The purpose of this paper is to present a new finite element formulation for the hydro-thermo-mechanical analysis of elasto-plastic multiphase materials based on Porous Media Mechanics. To this end, the ACMEG-T thermo-plastic constitutive model for saturat ...
2008Thermo-plasticity of fine-grained soils at various saturation states
Soil is a particulate material that may undergo irreversible strain as the relative positions of the constituent particles change. That irreversible behaviour may be induced not only by an external stress variation but also by temperature or suction change ...
EPFL2008ACMEG-TS: A constitutive model for unsaturated soils under non-isothermal conditions
Lyesse Laloui, Bertrand François
This paper introduces an unconventional constitutive model for soils which deals with a unified thermo-mechanical modelling for unsaturated soils. The relevant temperature and suction effects are studied in light of elasto-plasticity. A generalized effecti ...
2008Thermo-plasticity in unsaturated soils, a constitutive approach
Lyesse Laloui, Bertrand François
Research interest in the thermo-mechanical behaviour of unsaturated soils is growing as a result of an increasing number of geomechanical problems involving both thermal and unsaturated effects. A new constitutive model dealing with partially saturated soi ...
2008Unsaturated soils under non-isothermal conditions: Framework of a new constitutive model
Lyesse Laloui, Bertrand François
This paper addresses a new, unified thermo-mechanical constitutive model for unsaturated soils through a coupled study. In the context of elasto-plasticity and the critical state theory, the model uses the concepts of multi-mechanism and bounding surface t ...
2008EXPERIMENTAL INVESTIGATIONS OF TEMPERATURE AND SUCTION EFFECTS ON COMPRESSIBILITY AND PRE-CONSOLIDATION PRESSURE OF A SANDY SILT
Lyesse Laloui, Bertrand François, Simon Salager
Research interest in the thermo-mechanical behaviour of unsaturated soils is growing as a result of an increasing number of geomechanical problems involving both thermal and unsaturated effects. In this framework, this paper addresses a unified thermo-mech ...
2008Un modèle de comportement thermo-plastique pour les sols-non-saturés: Application aux stockages de déchets nucléaires
Un modèle constitutif thermo-hydro-mécanique dédié aux sols fins a été développé afin de prédire le comportement des géomatériaux intervenant dans la problématique du confinement des déchets nucléaires en couche géologique profonde. Ce modèle considère l’aspect couplé des processus thermique, hydrique et mécanique. Les équations constitutives sont présentées. L’implémentation de cette loi de comportement dans deux logiciels d’éléments finis a permis une étude rigoureuse de plusieurs scénarios rencontrés dans les sols entourant les futurs déchets radioactifs. Les enseignements de chacune de ces études ainsi que l’apport du modèle utilisé sont présentés.
2008A thermo-hydro-mechanical stress-strain framework for modeling the performance of clay barriers in deep geological repositories for radioactive waste
Lyesse Laloui, Azad Koliji, Bertrand François, Hervé Péron, Mathieu Nuth
Assessing the performance of deep geological repositories for heat-generating radioactive waste requires reliable predictions of the thermo-hydro-mechanical (THM) behaviour of the clay barriers (the buffer material as well as the host rock/clay). This repr ...
CRC Press2008