2014/04/30 by Hu Zheng, Joshua A. Dijksman, Robert Behringer +1
Earth and Planetary Sciences · Engineering · Materials Science · Physics and Astronomy · #Composite material #Condensed matter physics #Critical resolved shear stress #Geology #Geotechnical engineering #Granular flow and fluidized beds #High-pressure geophysics and materials #Jamming #Material Dynamics and Properties #Materials science #Mechanics #Physics #Rheology #Shear (geology) #Shear rate #Shear stress #Shear velocity #Simple shear #cond-mat.soft
paper · pdf · doi:10.1209/0295-5075/107/34005
published as EPL 107, 34005 (2014) · 6 pages, 5 figures
openalex publication_date 2014/07/31 · arxiv created 2014/08/08 · arxiv updated 2018/10/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Jammed states of frictional granular systems can be induced by shear strain at densities below the isostatic jamming density . It remains unclear, however, how much friction affects this so-called shear jamming. Friction appears in two ways in this type of experiment: friction between particles, and friction between particles and the base on which they rest. Here, we study how particle-bottom friction, or basal friction, affects shear jamming in quasi–two-dimensional experiments. In order to study this issue experimentally, we apply simple shear to a disordered packing of photoelastic disks. We can tune the basal friction of the particles by immersing the particles in a density matched liquid, thus removing the normal force, hence the friction, between the particles and base. We record the overall shear stress, and particle motion, and the photoelastic response of the particles. We compare the shear response of dry and immersed samples, which enables us to determine how basal friction affects shear jamming. Our findings indicate that changing the basal friction shifts the point of shear jamming, but it does not change the basic phenomenon of shear jamming.