-0001
Influence of the unsaturated zone of soil layer on the solute migration
La revue : Journal of Engineering Geology
Domaine : Géotechnique environnementale
Mots Clés : leachate, unsaturated soil, TDR methed
Auteur : I. ALIMIICHOLA, L. GAIDI
Issn : Eissn : vol : 85, Num : 1-2, pp : 2-8
Résume :

To design waste containment barriers, low permeability soils or manufactured liner products are required. For hydraulic barriers in waste containment system, it is recommended to use soil layer of 5 m thickness when the coefficient of the permeability is higher than 10− 6 m/s or a layer of one meter thickness, when the coefficient of permeability is lower than 10− 9 m/s. So some authors tried to prove analytically, that the barrier thickness can be reduced when the permeability of the soil is less than 10− 9 m/s (e.g. 10− 10 or 10− 11 m/s). This suggestion does not take into account the ion sorption and the solute migration delay which can occur in an unsaturated zone and reduce the solute transfer

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2019
Thermo-mechanical vibration analysis of non-local refined trigonometric shear deformable FG beams
La revue : International Journal of Hydromechatronics
Domaine : Civil Engineering
Mots Clés : FG nanobeam, vibration, thermal loading, shear deformation beam theory
Auteur : Mouffoki Abderrahmane, Aicha Bessaim, Houari Mohammed Sid Ahmed, Abdelhakim Kaci, Tounsi Abdelouahed, El Abbas Adda Bedia
Issn : 2515-0464 Eissn : 2515-0472 vol : 2, Num : 1, pp : 54-62
Résume :

In this article, thermo vibration analysis of functionally graded (FG) nanobeams subjected to linear and uniform temperature distribution is studied. The structure is modelled by new efficient shear beam theory considering the effect of shear deformation without shear correction factor. The mentioned theory satisfies the zero boundary traction conditions on the beam surfaces and can be used for transverse shear strains trigonometric distribution. Material properties of the nanostructure are assumed temperature-dependent and FG based on the distribution of power law. The influence of size scale is captured utilising Eringen theory of non-local elasticity. Based on the present theory, the motion equations are obtained using principle of Hamilton. It is found that the applied theory is very simple and leads to accurate results for thermo vibration analysis of FG nanobeams.

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