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Unsteady shear of dense assemblies of cohesive granular materials under constant volume conditions / Lee R. Aarons in Industrial & engineering chemistry research, Vol. 49 N° 11 (Juin 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 11 (Juin 2010) . - pp. 5153–5165 Titre : Unsteady shear of dense assemblies of cohesive granular materials under constant volume conditions Type de document : texte imprimé Auteurs : Lee R. Aarons, Auteur ; Jin Sun, Auteur ; Sankaran Sundaresan, Auteur Année de publication : 2010 Article en page(s) : pp. 5153–5165 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Granular  materials Résumé : The response characteristics of dense assemblies of cohesive granular materials to unsteady simple shear in the quasi-static regime are investigated through discrete element method (DEM) simulations of monodisperse spherical and frictional particles in periodic domains at constant volume. The dynamics of the volume-averaged normal and shear stresses in materials, undergoing stop-and-go shearing and oscillatory shear, are studied in detail. Furthermore, the evolution of microstructure anisotropy has been quantified through a fabric tensor. The stresses and the microstructure anisotropy depend on the strain extent but not on the shear rate. They both undergo a transition following reversal of shear direction, which requires a shear strain of order unity to fully adapt. The results reveal a correlation between the stress evolution and the microstructure anisotropy development. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901187w [article] Unsteady shear of dense assemblies of cohesive granular materials under constant volume conditions [texte imprimé] / Lee R. Aarons, Auteur ; Jin Sun, Auteur ; Sankaran Sundaresan, Auteur . - 2010 . - pp. 5153–5165. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 11 (Juin 2010) . - pp. 5153–5165 Mots-clés : Granular  materials Résumé : The response characteristics of dense assemblies of cohesive granular materials to unsteady simple shear in the quasi-static regime are investigated through discrete element method (DEM) simulations of monodisperse spherical and frictional particles in periodic domains at constant volume. The dynamics of the volume-averaged normal and shear stresses in materials, undergoing stop-and-go shearing and oscillatory shear, are studied in detail. Furthermore, the evolution of microstructure anisotropy has been quantified through a fabric tensor. The stresses and the microstructure anisotropy depend on the strain extent but not on the shear rate. They both undergo a transition following reversal of shear direction, which requires a shear strain of order unity to fully adapt. The results reveal a correlation between the stress evolution and the microstructure anisotropy development. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901187w