Stability of a granular layer on an inclined "fakir plane"
Jesica Benito, Yann Bertho, Irene Ippolito, Philippe Gondret
TL;DR
This study experimentally investigates how a forest of cylindrical nails affects the stability of a granular layer on an inclined rough plane, showing increased stability with denser obstacle arrangements and modeling this effect through additional friction forces.
Contribution
It introduces a simple model that explains how cylindrical obstacle arrays enhance granular layer stability on inclined planes, supported by experimental data.
Findings
Nail forests increase granular layer stability.
Denser obstacle arrays provide greater stabilization.
A friction-based model explains the stabilization effect.
Abstract
We present here experimental results on the effect of a forest of cylinder obstacles (nails) on the stability of a granular layer over a rough incline, in a so-called "fakir plane" configuration. The nail forest is found to increase the stability of the layer, the more for the densest array, and such an effect is recovered by a simple model taking into account the additional friction force exerted by the pillar forest onto the granular layer.
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