4 papers
X-ray observation of micro-failures in granular piles approaching an avalanche
Alexandre Kabla, Georges Debregeas, Jean-Marc Di Meglio +1
An X-ray imaging technique is used to probe the stability of 3-dimensional granular packs in a slowly rotating drum. Well before the surface reaches the avalanche angle, we observe…
Contact dynamics in a gently vibrated granular pile
Alexandre Kabla, Georges Debregeas
We use multi-speckle diffusive wave spectroscopy (MSDWS) to probe the micron-scale dynamics of a granular pile submitted to discrete gentle taps. The typical time-scale between pla…
Local Stress Relaxation and Shear-banding in a Dry Foam under Shear
Alexandre Kabla, Georges Debregeas
We have developed a realistic simulation of 2D dry foams under quasi-static shear. After a short transient, a shear-banding instability is observed. These results are compared with…
Partial rejuvenation of a colloidal glass
F. Ozon, T. Narita, A. Knaebel +3
We study the effect of shear on the aging dynamics of a colloidal suspension of synthetic clay particles. We find that a shear of amplitude reduces the relaxation time measured…