| type de publication : |
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Articles dans des revues avec comité de lecture |
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| domaine : |
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| titre : |
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Creep and fluidity of a real granular packing near jamming |
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| auteur(s) : |
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Van Bau Nguyen 1, 2, Thierry Darnige 3, Ary Bruand ( ) 2, Eric Clément 3 |
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| laboratoire : |
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| résumé : |
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We study the internal dynamical processes taking place in a granular packing below yield stress. At all packing fractions and down to vanishingly low applied shear, a logarithmic creep is observed. The experiments are analyzed using a viscoelastic model which introduces an internal, time-dependent, fluidity variable. For all experiments, the creep dynamics can be rescaled onto a unique curve which displays jamming at the random-close-packing limit. At each packing fraction, we measure a stress corresponding to the onset of internal granular reorganization and a slowing down of the creep dynamics before the final yield. |
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langue du texte
intégral : |
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Anglais |
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| journal : |
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| Physical Review Letters (Phys. Rev. Lett.) |
| Publisher |
American Physical Society |
| ISSN |
0031-9007 (eISSN : 1079-7114) |
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| Audience : |
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internationale |
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| date de publication : |
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10/01/2011 |
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| volume : |
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107 |
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| page, identifiant, ... : |
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5 p. |
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| contrat, financement : |
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CNRS-PEPS |
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| Projet ANR : |
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| Référence du projet |
ANR-JANVIBE |
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