Collisional model of energy dissipation in three-dimensional granular impact.

Journal Article

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 by 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.

Full Text

Duke Authors

Cited Authors

  • Bester, CS; Behringer, RP

Published Date

  • March 22, 2017

Published In

Volume / Issue

  • 95 / 3-1

Start / End Page

  • 032906 -

PubMed ID

  • 28415347

Electronic International Standard Serial Number (EISSN)

  • 2470-0053

International Standard Serial Number (ISSN)

  • 2470-0045

Digital Object Identifier (DOI)

  • 10.1103/physreve.95.032906

Language

  • eng