The impact of particle form on the packing and shear behaviour of some granular materials: an experimental study

摘要: This paper reports the results of experiments carried out to explore effects particle form, sometimes referred as sphericity, on depositional density and subsequent shear behaviour granular material. Previous experimental studies have generally neglected this important control, considering only rotund or bulky particles. However, a few numerical suggested its importance. Pluviated materials were tested in triaxial compression under free-end conditions, achieved using enlarged lubricated platens, which allowed specimens be taken high axial strain levels without localisation. Strains measured locally. The show that limiting void ratios, \(e_{max}\) \(e_{min}\), ratio range (\(e_{max}- e_{min})\) anisotropy increase particles become platy. Almost all aspects during are significantly affected by including mobilised friction at onset dilation, peak state ultimate (or critical) state, dilation breakage. For extremely platy material it appears dilatancy may completely suppressed, even for dense packings