Artículos de revistas
Supershear Rayleigh Waves at a Soft Interface
Fecha
2013-06-07Registro en:
Le Goff, Anne; Cobelli, Pablo Javier; Lagubeau, Guillaume; Supershear Rayleigh Waves at a Soft Interface; Amer Physical Soc; Physical Review Letters; 110; 7-6-2013; 236101-236105;
0031-9007
Autor
Le Goff, Anne
Cobelli, Pablo Javier
Lagubeau, Guillaume
Resumen
We report on the experimental observation of waves at a liquid foam surface propagating faster than the bulk shear waves. The existence of such waves has long been debated, but the recent observation of supershear events in a geophysical context has inspired us to search for their existence in a model viscoelastic system. An optimized fast profilometry technique allows us to observe on a liquid foam surface the waves triggered by the impact of a projectile. At high impact velocity, we show that the expected subshear Rayleigh waves are accompanied by faster surface waves that can be identified as supershear Rayleigh waves.