Comptes Rendus
no. 3
Particle size and boundary geometry effects on the bulk friction coefficient of sheared granular materials in the inertial regime
Andrés D. Orlando1  ; Hayley H. Shen2
1 Jenike & Johanson, Inc., 400 Business Park Drive, Tyngsboro, MA 01879, USA
2 Department of Civil and Environmental Engineering, Clarkson University, 8 Clarkson Ave., P.O. Box 5710, Potsdam, NY 13699-5710, USA
Comptes Rendus. Mécanique, Micromechanics of granular materials – A tribute to Ching S. Chang, Volume 342 (2014) no. 3, pp. 151-155.

Glass beads of varying diameters (d=2,3,4, and 5 mm) are used to measure the ratio of shear-to-normal stress, or bulk friction coefficient, generated inside an annular shear cell at high shearing rates. The effects of the particle size, the solids concentration, and the shear rate are explored. It is found that (1) for a given particle size, the magnitude of the bulk friction coefficient decreases with increasing solids concentration, (2) for a given solids concentration, the bulk friction coefficient decreases with increasing particle size, and (3) the bulk friction coefficient is independent of the shear rate except for cases with low solids concentration, where it decreases with increasing shear rate. The boundary geometry is found to affect bulk friction only for dilute (low solids concentration) flows involving small particles.

Publié le :
DOI : 10.1016/j.crme.2014.01.009
Mots-clés : Granular, Shear, Bulk friction, Size, Boundary effect

Andrés D. Orlando 1 ; Hayley H. Shen 2

1 Jenike & Johanson, Inc., 400 Business Park Drive, Tyngsboro, MA 01879, USA
2 Department of Civil and Environmental Engineering, Clarkson University, 8 Clarkson Ave., P.O. Box 5710, Potsdam, NY 13699-5710, USA 
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Andrés D. Orlando; Hayley H. Shen. Particle size and boundary geometry effects on the bulk friction coefficient of sheared granular materials in the inertial regime. Comptes Rendus. Mécanique, Micromechanics of granular materials – A tribute to Ching S. Chang, Volume 342 (2014) no. 3, pp. 151-155. doi : 10.1016/j.crme.2014.01.009. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2014.01.009/

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  • Hongxiang Tang; Rui Song; Yan Dong; Xiaoyu Song Measurement of Restitution and Friction Coefficients for Granular Particles and Discrete Element Simulation for the Tests of Glass Beads, Materials, Volume 12 (2019) no. 19, p. 3170 | DOI:10.3390/ma12193170
  • Sara Koynov; Benjamin Glasser; Fernando Muzzio Comparison of three rotational shear cell testers: Powder flowability and bulk density, Powder Technology, Volume 283 (2015), p. 103 | DOI:10.1016/j.powtec.2015.04.027

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