| Titre : | Unsteady shear of dense assemblies of cohesive granular materials under constant volume conditions (2010) |
| Auteurs : | Lee R. Aarons, Auteur ; Jin Sun, Auteur ; Sankaran Sundaresan, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 49 N° 11, Juin 2010) |
| Article en page(s) : | pp. 5153–5165 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | 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 |
