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Response of granular media to rapid penetration
There has been a flurry of interest over the past decade in the study of impact and
penetration into granular media. A wealth of knowledge has resulted from these efforts. This …
penetration into granular media. A wealth of knowledge has resulted from these efforts. This …
Elasticity and rheology of auxetic granular metamaterials
The flowing, jamming, and avalanche behavior of granular materials is satisfyingly universal
and vexingly hard to tune: A granular flow is typically intermittent and will irremediably jam if …
and vexingly hard to tune: A granular flow is typically intermittent and will irremediably jam if …
Impact on granular beds
The impact of an object on a granular solid is an ubiquitous phenomenon in nature, the
scale of which ranges from the impact of a raindrop onto sand all the way to that of a large …
scale of which ranges from the impact of a raindrop onto sand all the way to that of a large …
Archimedes' law explains penetration of solids into granular media
Understanding the response of granular matter to intrusion of solid objects is key to
modelling many aspects of behaviour of granular matter, including plastic flow. Here we …
modelling many aspects of behaviour of granular matter, including plastic flow. Here we …
Particle scale dynamics in granular impact
We perform an experimental study of granular impact, where intruders strike 2D beds of
photoelastic disks from above. High-speed video captures the intruder dynamics and the …
photoelastic disks from above. High-speed video captures the intruder dynamics and the …
Depth-dependent resistance of granular media to vertical penetration
We measure the quasistatic friction force acting on intruders moving downwards into a
granular medium. By utilizing different intruder geometries, we demonstrate that the force …
granular medium. By utilizing different intruder geometries, we demonstrate that the force …
Drag induced lift in granular media
Laboratory experiments and numerical simulation reveal that a submerged intruder dragged
horizontally at a constant velocity within a granular medium experiences a lift force whose …
horizontally at a constant velocity within a granular medium experiences a lift force whose …
Nonlinear force propagation during granular impact
We experimentally study nonlinear force propagation into granular material during impact
from an intruder, and we explain our observations in terms of the nonlinear grain-scale force …
from an intruder, and we explain our observations in terms of the nonlinear grain-scale force …
Granular impact and the critical packing state
Impact dynamics during collisions of spheres with granular media reveal a pronounced and
nontrivial dependence on volume fraction ϕ. Postimpact crater morphology identifies the …
nontrivial dependence on volume fraction ϕ. Postimpact crater morphology identifies the …
Drag force scaling for penetration into granular media
Impact dynamics is measured for spherical and cylindrical projectiles of many different
densities dropped onto a variety non-cohesive granular media. The results are analyzed in …
densities dropped onto a variety non-cohesive granular media. The results are analyzed in …