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Role of Particle Shape on the Stress Propagation in Granular Packings

We present an experimental and numerical study on the influence that particle aspect ratio has on the mechanical and structural properties of granular packings. For grains with maximal symmetry (squares), the stress propagation in the packing localizes forming chainlike forces analogous to the ones observed for spherical grains. This scenario can be understood in terms of stochastic models of aggregation and random multiplicative processes. As the grains elongate, the stress propagation is strongly affected. The interparticle normal force distribution tends toward a Gaussian, and, correspondingly, the force chains spread leading to a more uniform stress distribution reminiscent of the hydrostatic profiles known for standard liquids

American Physical Society

Author: Cruz Hidalgo, Raúl
Zuriguel, Iker
Maza, Diego
Pagonabarraga Mora, Ignacio
Abstract: We present an experimental and numerical study on the influence that particle aspect ratio has on the mechanical and structural properties of granular packings. For grains with maximal symmetry (squares), the stress propagation in the packing localizes forming chainlike forces analogous to the ones observed for spherical grains. This scenario can be understood in terms of stochastic models of aggregation and random multiplicative processes. As the grains elongate, the stress propagation is strongly affected. The interparticle normal force distribution tends toward a Gaussian, and, correspondingly, the force chains spread leading to a more uniform stress distribution reminiscent of the hydrostatic profiles known for standard liquids
Document access: http://hdl.handle.net/2072/209823
Language: eng
Publisher: American Physical Society
Rights: Tots els drets reservats
Subject: Processos estocàstics
Stochastic processes
Anàlisi numèrica
Numerical analysis
Materials granulars
Granular materials
Title: Role of Particle Shape on the Stress Propagation in Granular Packings
Type: info:eu-repo/semantics/article
Repository: Recercat

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