Collisional Model of Energy Dissipation in 3D Granular Impact
arXiv:1610.09346 · doi:10.1103/PhysRevE.95.032906
Abstract
We study the dynamic process occurring when a granular assembly is displaced by a solid impactor. The momentum transfer from the impactor to the target is shown to occur through sporadic, normal collisions of high force carrying grains at the intruder surface. We therefore describe the stopping force of the impact through a collisional based model. To verify the model in impact experiments, we determine the forces acting on an intruder decelerating through a dense granular medium using high-speed imaging of its trajectory. By varying the intruder shape and granular target, intruder-grain interactions are inferred from the consequent path. As a result, we connect the drag to the effect of intruder shape and grain density based on a proposed collisional model.
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Cited by in corpus (9)
- Constitutive relation for the system-spanning dynamically jammed region in response to impact of cornstarch and water suspensions
- Intrusion into granular media beyond the quasi-static regime
- Power law scaling of early-stage forces during granular impact
- Effect of two parallel intruders on net work during granular penetrations
- Impact-induced energy transfer and dissipation in granular clusters under microgravity conditions
- Contacts, motion and chain-breaking in a two-dimensional granular system displaced by an intruder
- Ricochets on Asteroids II: Sensitivity of laboratory experiments of low velocity grazing impacts on substrate grain size
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- Undulatory forcing of an intruder through granular media: effects of frequency and packing fraction