Influence of the feeding mechanism on deposits of square particles

Acevedo, M.F. Buitrago; Hidalgo, R. C.; Zuriguel, Iker; Maza, Diego; Pagonabarraga, Ignacio

doi:10.1103/physreve.87.012202

Cited by 17 publications

(13 citation statements)

References 43 publications

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“…When the column is built with a higher feeding rate, however, the polar distribution of the principal direction is more uniform, denoting the establishment of a more spherical stress state. For very high feeding rate, however, this effect is reversed (data not shown) in accord with the non monotonic behavior displayed in Fig.3a [17].…”

Section: Micromechanicssupporting

confidence: 71%

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Influence of the feeding rate on the packing properties of faceted particles

Hidalgo¹,

Acevedo²,

Zuriguel³

et al. 2013

AIP Conference Proceedings

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Abstract. The effect of the filling mechanism on the packing of faceted particles with different aspect ratios has been examined. We have experimentally measured the particle angular distribution and the packing fraction of ensembles of faceted particles deposited in a bidimensional box. The granular system has been numerically simulated using a two-dimensional model of faceted particles. We found that increasing the feeding rate results in an enhancement of the disorder in the final deposit and, consequently, in a reduction of the number of particles oriented in their most stable configuration. In this regime, the final packing fraction monotonically decreases as the feeding rate increases. The correlations between the final packing morphology and the stress transmission were examined by describing the micromechanical properties of the deposits. For the case of elongated particles, increasing the feeding rate leads to an enhancement of the stress transmission towards the sides of the box. On the contrary, for the case of square particles, increasing the feeding rate promotes vertical transmission of the stress.

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Section: Micromechanicssupporting

confidence: 71%

“…Moreover we will express our results in terms of a dimensionalized feeding rate f * = f /W = vφ 0 /A. More details about the experimental setup can be found in [17].…”

Section: Methodsmentioning

confidence: 99%

Influence of the feeding rate on the packing properties of faceted particles

Hidalgo¹,

Acevedo²,

Zuriguel³

et al. 2013

AIP Conference Proceedings

Self Cite

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“…The increase of these interactions has also been observed in experiments [42] as well as in numerical simulations with elongated particles in 2D [15,18].…”

Section: Summary and Discussionsupporting

confidence: 48%

Particle alignment and clustering in sheared granular materials composed of platy particles

Boton¹,

Estrada²,

Azéma³

et al. 2014

Eur. Phys. J. E

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Abstract. By means of molecular dynamics simulations, we investigate the texture and local ordering in sheared packings composed of cohesionless platy particles. The morphology of large packings of platy particles in quasistatic equilibrium is complex due to the combined effects of local nematic ordering of the particles and anisotropic orientations of contacts between particles. We find that particle alignment is strongly enhanced by the degree of platyness and leads to the formation of face-connected clusters of exponentially decaying size. Interestingly, due to dynamics in continuous shearing, this ordering phenomenon emerges even in systems composed of particles of very low platyness differing only slightly from spherical shape. The number of clusters is an increasing function of platyness. However, at high platyness the proportion of face-face interactions is too low to allow for their percolation throughout the system. PACS. PACS-key discribing text of that key -PACS-key discribing text of that key

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“…The computational time is further reduced using a combination of the Verlet distance concept and neighbor tables that is tailored for this particular case of geometrical objects [43][44][45][46]. While the major application of this method has been the investigation of granular flow [47] and pedestrian flow [48], it is shown that particles generated by Minkowski sums are promising in the investigation of the effects of friction and rheology due in flat and nonconvex particles [49,50]. Here we exploit further the effect of nonconvexity on friction by using nonconvex spheropolygons with complex (fractal) topography.…”

Section: Spheropolygon-based Simulations Of Friction Between Fracmentioning

confidence: 99%

Static friction between rigid fractal surfaces

et al. 2015

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Using spheropolygon-based simulations and contact slope analysis, we investigate the effects of surface topography and atomic scale friction on the macroscopically observed friction between rigid blocks with fractal surface structures. From our mathematical derivation, the angle of macroscopic friction is the result of the sum of the angle of atomic friction and the slope angle between the contact surfaces. The latter is obtained from the determination of all possible contact slopes between the two surface profiles through an alternative signature function. Our theory is validated through numerical simulations of spheropolygons with fractal Koch surfaces and is applied to the description of frictional properties of Weierstrass-Mandelbrot surfaces. The agreement between simulations and theory suggests that for interpreting macroscopic frictional behavior, the descriptors of surface morphology should be defined from the signature function rather than from the slopes of the contacting surfaces.

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Influence of the feeding mechanism on deposits of square particles

Cited by 17 publications

References 43 publications

Influence of the feeding rate on the packing properties of faceted particles

Influence of the feeding rate on the packing properties of faceted particles

Particle alignment and clustering in sheared granular materials composed of platy particles

Static friction between rigid fractal surfaces

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