NDLI: Angle of repose and stress distribution of sandpiles formed with ellipsoidal particles

Content Provider	Springer Nature Link
Author	Zhou, Z. Y. Zou, R. P. Pinson, D. Yu, A. B.
Copyright Year	2014
Abstract	The properties of a sandpile such as angle of repose and stress distribution are affected by many variables, among which particle shape is one of the most important. In this work, ellipsoids which can represent a large range of shapes varying from disk- to cylinder-type are used. The discrete element method is employed in order to conduct controlled numerical experiments. The results confirm the general findings reported in the literature. It also shows that with aspect ratios deviating from 1.0, the angle of repose increases significantly, but disk-type shape and cylinder-type shape follow different variation trends. Empirical correlations between the angle of repose and aspect ratio or sphericity are proposed. The analysis on the stress distribution shows that particle shape affects the magnitude of the normal contact force between particles significantly, with spheres being the smallest. The pressure distribution underneath sandpiles is featured with a relatively constant normal pressure in the central region rather than a dip. It is confirmed that non-spherical particles have more pronounced stress dip than spherical particles.
Starting Page	695
Ending Page	709
Page Count	15
File Format	PDF
ISSN	14345021
Journal	Granular Matter
Volume Number	16
Issue Number	5
e-ISSN	14347636
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-08-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Sandpile Ellipsoids Angle of repose Stress dip Discrete element method Soft and Granular Matter, Complex Fluids and Microfluidics Engineering Fluid Dynamics Materials Science Geoengineering, Foundations, Hydraulics Industrial Chemistry/Chemical Engineering Engineering Thermodynamics, Heat and Mass Transfer
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Mechanics of Materials Materials Science

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