Citation
A. Kabla and G. Debregeas
Physical Review Letters 90:258303 (2003)
Abstract
Abstract
We have developed a realistic simulation of 2D dry foams under quasistatic shear. After a short transient, a shear-banding instability is observed. These results are compared with measurements obtained on real 2D (confined) foams. The numerical model allows us to exhibit the mechanical response of the material to a single plastication event. From the analysis of this elastic propagator, we propose a scenario for the onset and stability of the flow localization process in foams, which should remain valid for most athermal amorphous systems under creep flow.
Figure sample
(a) Snapshot of a simulated foam with 16×48 bubbles. The foam has periodic boundary conditions along the x direction. Films laying at upper and lower edges are fixed; shearing is obtained by moving the lower edge along the x direction. (b) Example of a topological change (T1 process) occurring inside the foam upon shearing.
