Local Stress Relaxation and Shear Banding in a Dry Foam under Shear
A. Kabla and G. Debrégeas
Physical Review Letters 90:258303 (2003), doi:10.1103/PhysRevLett.90.258303
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.