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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

Autor: Cruz Hidalgo, Raúl
Zuriguel, Iker
Maza, Diego
Pagonabarraga Mora, Ignacio
Resum: 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
Accés al document: http://hdl.handle.net/2072/209823
Llenguatge: eng
Editor: American Physical Society
Drets: Tots els drets reservats
Matèria: Processos estocàstics
Stochastic processes
Anàlisi numèrica
Numerical analysis
Materials granulars
Granular materials
Títol: Role of Particle Shape on the Stress Propagation in Granular Packings
Tipus: info:eu-repo/semantics/article
Repositori: Recercat

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