Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Anisotropic Behaviour of Sand in the Small Strain Domain. Experimental Measurements and Modelling
Abstract This paper deals with the initial and loading path induced anisotropy for a sub angular granular material, Hostun sand. The “quasi” elastic properties observed in the small strain domain (<10−5 m/m) are considered. A “static and dynamic” triaxial device is used for the experimental campaign. First, the five parameters of the transverse isotropic elastic compliance tensor are experimentally obtained. The experimental investigations consist in applying small axial cyclic loadings (strain amplitude cycle εsa≅ 10−5 m/m) and four types of dynamic wave propagations, generated by piezoelectric sensors (compressive and shear waves in axial and radial directions). The followed isotropic and deviatoric stress path underlines the effects of respectively inherent and induced anisotropy. A rheological hypoelastic model, called DBGS model, which takes into account the stress induced anisotropy, is firstly described. This model is not sufficient to properly describe experimental results at isotropic stress state as well as thus obtained during deviatoric stress path for medium and large strain. Then, an extension of the model is proposed, called DBGSP model, where strain induced anisotropy is taken into account. The concept of virtual strain induced anisotropy is introduced in this rheological hypoelastic model developed at ENTPE, and the ability of the model to foresee experimental behaviour is checked.
Anisotropic Behaviour of Sand in the Small Strain Domain. Experimental Measurements and Modelling
Abstract This paper deals with the initial and loading path induced anisotropy for a sub angular granular material, Hostun sand. The “quasi” elastic properties observed in the small strain domain (<10−5 m/m) are considered. A “static and dynamic” triaxial device is used for the experimental campaign. First, the five parameters of the transverse isotropic elastic compliance tensor are experimentally obtained. The experimental investigations consist in applying small axial cyclic loadings (strain amplitude cycle εsa≅ 10−5 m/m) and four types of dynamic wave propagations, generated by piezoelectric sensors (compressive and shear waves in axial and radial directions). The followed isotropic and deviatoric stress path underlines the effects of respectively inherent and induced anisotropy. A rheological hypoelastic model, called DBGS model, which takes into account the stress induced anisotropy, is firstly described. This model is not sufficient to properly describe experimental results at isotropic stress state as well as thus obtained during deviatoric stress path for medium and large strain. Then, an extension of the model is proposed, called DBGSP model, where strain induced anisotropy is taken into account. The concept of virtual strain induced anisotropy is introduced in this rheological hypoelastic model developed at ENTPE, and the ability of the model to foresee experimental behaviour is checked.
Anisotropic Behaviour of Sand in the Small Strain Domain. Experimental Measurements and Modelling
Ezaoui, A. (Autor:in) / Benedetto, H. (Autor:in) / Bang, D. (Autor:in)
01.01.2007
16 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
granular media , sand , small strain , hypoelasticity , anisotropy , wave propagations , local measurements , triaxial device Physics , Soft and Granular Matter, Complex Fluids and Microfluidics , Continuum Mechanics and Mechanics of Materials , Building Materials , Geoengineering, Foundations, Hydraulics , Numerical and Computational Physics
Anisotropic Behaviour of Sand in the Small Strain Domain. Experimental Measurements and Modelling
| British Library Conference Proceedings | 2007
Modelling viscous effects for sand and behaviour in the small strain domain
| British Library Conference Proceedings | 2001
Measuring the small-strain behaviour of sand in situ
| British Library Conference Proceedings | 1994
Small strain behaviour of a lime-treated silty sand
| British Library Conference Proceedings | 2003
Experimental creep behaviour and modelling of silicified sand
| British Library Online Contents | 2013