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Particle shape is a key to the space-filling and strength properties of granular matter. We consider a shape parameter eta describing the degree of distortion from a perfectly spherical shape. Encompassing most specific shape characteristics such as elongation, angularity and non-convexity, eta is a low-order but generic parameter that we used in a numerical benchmark test for a systematic investigation of shape dependence in sheared granular packings composed of particles of different shapes. We find that the shear strength is an increasing function of eta with nearly the same trend for all shapes, the differences appearing thus to be of second order compared to eta. We also observe a non-trivial 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. These findings suggest that a low-order description of particle shape accounts for the principal trends of packing fraction and shear strength. Hence, the effect of second-order shape parameters may be investigated by considering different shapes at the same level of eta.
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Autorzy (13)
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Cegeo Cegeo
- Collaborative group "Changement d'Echelle dans les GEO-matériaux" (scale change in geomaterials). .
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B. Saint-Cyr
- Univ Montpellier 2, CNRS, LMGC UMR 5508, F-34095 Montpellier, France; CEA, DEN, SPUA, LCU, F-13108 St Paul Les Durance, France .
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Krzysztof Szarf dr inż.
- UJF Grenoble 1, Grenoble INP, CNRS UMR 5521, Lab 3SR, F-38041 Grenoble 09, France .
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C. Voivret
- SNCF Innovat & Res Immeuble Lumiere, F-75611 Paris 12, France .
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E. Azéma
- Univ Montpellier 2, CNRS, LMGC UMR 5508, F-34095 Montpellier, France .
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V. Richefeu
- UJF Grenoble 1, Grenoble INP, CNRS UMR 5521, Lab 3SR, F-38041 Grenoble 09, France .
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J.-Y. Delenne
- IATE, UMR INRA CIRAD Montpellier Supagro UM2 1208, F-34060 Montpellier 01, France .
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Gaël Combe
- UJF Grenoble 1, Grenoble INP, CNRS UMR 5521, Lab 3SR, F-38041 Grenoble 09, France .
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C. Nouguier-Lehon
- Univ Lyon, Ecole Cent Lyon, LTDS UMR CNRS 5513, F-69134 Ecully, France .
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Pascal Villard
- UJF Grenoble 1, Grenoble INP, CNRS UMR 5521, Lab 3SR, F-38041 Grenoble 09, France .
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P. Sornay
- CEA, DEN, SPUA, LCU, F-13108 St Paul Les Durance, France .
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M. Chaze
- Univ Lyon, Ecole Cent Lyon, LTDS UMR CNRS 5513, F-69134 Ecully, France .
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F. Radjai
- Univ Montpellier 2, CNRS, LMGC UMR 5508, F-34095 Montpellier, France .
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuł w czasopiśmie wyróżnionym w JCR
- Opublikowano w:
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EPL-EUROPHYS LETT
nr 98,
wydanie 4,
strony 1 - 5,
ISSN: 0295-5075 - Język:
- angielski
- Rok wydania:
- 2012
- Opis bibliograficzny:
- Cegeo C., Saint-Cyr B., Szarf K., Voivret C., Azéma E., Richefeu V., Delenne J., Combe G., Nouguier-Lehon C., Villard P., Sornay P., Chaze M., Radjai F.: Particle shape dependence in 2D granular media// EPL-EUROPHYS LETT. -Vol. 98, iss. 4 (2012), s.1-5
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1209/0295-5075/98/44008
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 97 razy
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