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Abstract
Particle shape is a major parameter for the space-filling and strength properties of granular materials. For a systematic investigation of shape effect, a numerical benchmark test was set up within a collaborative group using different numerical methods and particles of various shape characteristics such as elongation, angularity and nonconvexity. Extensive 2D shear simulations were performed in this framework and the shear strength and packing fraction were compared for different shapes. We show that the results may be analyzed in terms of a low-order shape parameter eta describing the degree of distortion from a perfectly circular shape. In particular, the shear strength is an increasing function of eta with nearly the same trend for all shapes, the differences being of second order compared to eta. We also observe a nontrivial behavior of packing fraction which, for all our simulated shapes, increases with eta from the random close packing fraction for disks, reaches a peak considerably higher than that for disks, and subsequently declines as eta is further increased. Finally, the analysis of contact forces for the same value of eta leads to very similar statistics regardless of our specific particle shapes.
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Authors (13)
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Gaël Combe
- UJF-Grenoble 1, Grenoble-INP, CNRS UMR 5521, 3SR Lab., Grenoble, France .
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Cécile Nouguier-Lehon
- University of Lyon, Ecole Centrale de Lyon, LTDS UMR CNRS 5513, Ecully, France .
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Émilien Azéma
- University Montpellier 2, CNRS, LMGC UMR 5508, Montpellier, France .
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Baptiste Saint-Cyr
- University Montpellier 2, CNRS, LMGC UMR 5508, Montpellier, France .
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Marie Chaze
- University of Lyon, Ecole Centrale de Lyon, LTDS UMR CNRS 5513, Ecully, France .
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Farhang Radjaï
- University Montpellier 2, CNRS, LMGC UMR 5508, Montpellier, France .
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Pascal Villard
- UJF-Grenoble 1, Grenoble-INP, CNRS UMR 5521, 3SR Lab., Grenoble, France .
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Jean-Yves Delenne
- IATE, UMR 1208 INRA-CIRAD-Montpellier Supagro-UM2, Montpellier, France .
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Vincent Richefeu
- UJF-Grenoble 1, Grenoble-INP, CNRS UMR 5521, 3SR Lab., Grenoble, France .
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Philippe Sornay
- CEA, DEN, SPUA, LCU, Saint Paul lez Durance, France .
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Charles Voivret
- SNCF Innovation and Research, Paris, France .
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Cegeo Cegeo
- Collaborative group Changement d'Échelle dans les GÉOmatériaux (scale change in geomaterials), France .
Cite as
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Keywords
Details
- Category:
- Conference activity
- Type:
- materiały konferencyjne indeksowane w Web of Science
- Title of issue:
- 7th International Conference on Micromechanics of Granular Media (Powders and Grains) strony 883 - 886
- Language:
- English
- Publication year:
- 2013
- Bibliographic description:
- Combe G., Nouguier-Lehon C., Azéma E., Szarf K., Saint-Cyr B., Chaze M., Radjaï F., Villard P., Delenne J., Richefeu V., Sornay P., Voivret C., Cegeo C..: A benchmark for particle shape dependence, W: 7th International Conference on Micromechanics of Granular Media (Powders and Grains), 2013, ,.
- DOI:
- Digital Object Identifier (open in new tab) 10.1063/1.4812073
- Verified by:
- Gdańsk University of Technology
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