Liquefaction of immersed granular media under isotropic compression
1 Ecole Nationale des Travaux Publics de l'Etat, LGCB, LTDS (UMR 5513) - Vaulx en Velin, France
2 Ecole Centrale de Lyon, LTDS (UMR 5513) - Ecully, France
Received: 18 June 2014
Accepted: 7 October 2014
We report an observation of the spontaneous liquefaction of glass beads immersed in water and compacted by external isotropic stress. We show that during compression, loose granular samples exhibit a series of sudden rearrangements accompanied by a transient overpressure of interstitial fluid. Ultimately, spontaneous liquefaction with large deformation of the sample is observed. By contrast, denser samples do not show a liquefaction by maintaining its shape integrity. We then discuss the potential mechanisms which could explain this unexpected liquefaction.
PACS: 45.70.Cc – Static sandpiles; granular compaction / 83.80.Fg – Granular solids / 83.85.St – Stress relaxation
© EPLA, 2014