Directional shear-jamming

Abstract

In this work we, study shear reversals of dense non-Brownian suspensions composed of cohesionless elliptical particles. By numerical simulations, we show that a new fragility appears for frictionless ellipses in the flowing states, where particles can flow indefinitely in one direction at applied shear stresses but shear-jams in the other direction upon shear stress reversal. This new fragility, absent in the isotropic particle case, is linked to the directional order of the elongated particles at steady shear and its reorientation at shear stress reversal, which forces the suspensions to pass through a more disordered state with an increased number of contacts in which it might get arrested.

arXiv comment5 pages, 6 figures, 2 pages SI, 3 figures in SI

References in corpus (10)

• Discontinuous Shear Thickening of Frictional Hard-Sphere Suspensions
• Discontinuous shear thickening without inertia in dense non-Brownian suspensions
• Hydrodynamic and contact contributions to shear thickening in colloidal suspensions
• Transition from viscous to inertial regime in dense suspensions
• A unified framework for non-Brownian suspension flows and soft amorphous solids
• Shear jamming and fragility in dense suspensions
• Rheology of dense granular flows for elongated particles
• Shear jammed, fragile, and steady states in homogeneously strained granular materials
• Unified phase diagram of reversible-irreversible, jamming and yielding transitions in cyclically sheared soft sphere packings
• Extended $\mu (J)$-rheology for dense suspensions at oscillatory shear flows

Cited by in corpus (1)

• Orientational arrest in dense suspensions of elliptical particles under oscillatory shear flows