Abstract

The energy adsorption during the normal and oblique impacts of different spherical granules (γ-Al2O3, zeolite 4A, sodium benzoate) has been experimentally studied. Free-fall tests have been carried out to obtain the normal and tangential restitution coefficients that characterise the energy losses durizng loading and unloading. The effects of the granule impact velocity in the range of 0.5 to 4.5m/s and the impact angle from 0° to 80° on the restitution coefficient have been examined. Free-fall experiments with wet granules have been shown that the moisture content has non-negligible influence on the damping behaviour of plastic granules.

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