Flow-Arrest Transitions in Frictional Granular Matter.

@article{Srivastava2019FlowArrestTI,
  title={Flow-Arrest Transitions in Frictional Granular Matter.},
  author={Ishan Srivastava and Leonardo E. Silbert and Gary S. Grest and Jeremy B. Lechman},
  journal={Physical review letters},
  year={2019},
  volume={122 4},
  pages={
          048003
        }
}
The transition between shear-flowing and shear-arrested states of frictional granular matter is studied using constant-stress discrete element simulations. By subjecting a dilute system of frictional grains to a constant external shear stress and pressure, friction-dependent critical shear stress and density are clearly identified with both exhibiting a crossover between low and high friction. The critical shear stress bifurcates two nonequilibrium steady states: (i) steady state shear flow… Expand
Evolution of internal granular structure at the flow-arrest transition
Abstract The evolution of the internal granular structure in shear-arrested and shear-flowing states of granular materials is characterized using fabric tensors as descriptors of the internal contactExpand
Flow and Arrest in Stressed Granular Materials
Flowing granular materials often abruptly arrest if not driven by sufficient applied stresses. Such abrupt cessation of motion can be economically expensive in industrial materials handling andExpand
Giant fluctuations in the flow of fluidised soft glassy materials: an elasto-plastic modelling approach
In this work we study the rheological features of yield stress materials that exhibit non-homogeneous steady flows and that are subjected to an additional mechanical noise. Using a mesoscaleExpand
Shear jamming and fragility in dense suspensions
The phenomenon of shear-induced jamming is a factor in the complex rheological behavior of dense suspensions. Such shear-jammed states are fragile, i.e., they are not stable against applied stressesExpand
Yielding versus jamming: critical scaling of sheared, soft-core disks and spheres
Using discrete element simulations, we demonstrate critical behavior for yielding of assemblies of soft-core repulsive disks (2D) and spheres (3D) over a wide range of dimensionless pressures.Expand
Critical scaling for yield is independent of distance to isostaticity
Using discrete element simulations, we demonstrate that critical behavior for yielding in soft disk and sphere packings is independent of distance to isostaticity over a wide range of dimensionlessExpand
Viewing Earth’s surface as a soft-matter landscape
Earth’s surface is composed of a staggering diversity of particulate–fluid mixtures: dry to wet, dilute to dense, colloidal to granular and attractive to repulsive particles. This material variety isExpand
Multi-material model for mesoscopic analysis of porosity evolution during laser powder-bed fusing TiNbTa powder mixture
Abstract The three-dimension mesoscopic model for laser powder-bed fusion (LPBF) of multi-elements Ti25Nb10Ta alloy has been established by coupling the discrete element method and finite elementExpand
The Physics of Sediment Transport Initiation, Cessation, and Entrainment Across Aeolian and Fluvial Environments
Predicting the morphodynamics of sedimentary landscapes due to fluvial and aeolian flows requires answering the following questions: Is the flow strong enough to initiate sediment transport, is theExpand
Data-Driven multiscale modeling in mechanics
TLDR
A proposed Data-Driven framework for multiscale mechanical analysis of materials is demonstrated, able to predict the material response under complex nonmonotonic loading paths, and compares well against plane strain and triaxial compression shear banding experiments. Expand
...
1
2
...

References

SHOWING 1-10 OF 73 REFERENCES
Crossover from quasi-static to dense flow regime in compressed frictional granular media
We investigate the evolution of multi-scale mechanical properties towards the macroscopic mechanical instability in frictional granular media under multiaxial compressive loading. SpatialExpand
Shear stress fluctuations in the granular liquid and solid phases.
TLDR
It is shown that shear stress fluctuations in both granular solid and fluid states are non-Gaussian at low shear rates, reflecting the predominance of correlated structures in the solidlike phase, and that the central limit theorem holds. Expand
‘Flow and jam’ of frictional athermal systems under shear stress
We report recent results of molecular dynamics simulations of frictional athermal particles at constant volume fraction and constant applied shear stress, focussing on a range of control parametersExpand
Boundary effects and self-organization in dense granular flows
Boundary effects in gravity-driven, dense granular flows down inclined planes are studied using large-scale molecular dynamics simulations. We find that the flow behavior and structure of the flowingExpand
Slow creep in soft granular packings.
TLDR
Transient creep mechanisms in soft granular packings are studied numerically using a constant pressure and constant stress simulation method and microscopic analysis indicates the existence of a correlation between rheology and nonaffine fluctuations. Expand
Viscosity bifurcation in granular materials, foams, and emulsions.
We show that the rheological properties of dry granular materials, as well as foams and emulsions, are similar to typical thixotropic fluids: under a sufficiently strong shear the viscosity decreasesExpand
Phase diagram for inertial granular flows.
TLDR
The phase diagram of dense inertial flow of spherical particles is derived, finding three regimes for 10^{-4}≲I≲10^{-1}: frictionless, frictional sliding, and rolling, and rationalize the phase boundaries between these regimes, show that energy balance yields scaling relations between microscopic properties in each of them, and derive the strain scale at which particles lose memory of their velocity. Expand
Granular flow down an inclined plane: Bagnold scaling and rheology.
TLDR
A systematic, large-scale simulation study of granular media in two and three dimensions, investigating the rheology of cohesionless granular particles in inclined plane geometries, finds that a steady-state flow regime exists in which the energy input from gravity balances that dissipated from friction and inelastic collisions is found. Expand
A constitutive law for dense granular flows
TLDR
The results support the idea that a simple visco-plastic approach can quantitatively capture granular flow properties, and could serve as a basic tool for modelling more complex flows in geophysical or industrial applications. Expand
Criticality in the Approach to Failure in Amorphous Solids.
TLDR
It is argued that the entire solid phase (Σ<Σmax) is critical, that plasticity always involves system-spanning events, and that their magnitude diverges at Σmax independently of the presence of shear bands. Expand
...
1
2
3
4
5
...