%0 Journal Article
%T Gravity driven instability in elastic solid Layers
%+ Physique et Mécanique des Milieux Divisés (PMMD)
%+ Laboratoire Charles Coulomb (L2C)
%+ Department of Mathematics [University of Arizona]
%A Mora, Serge
%A Phou, Ty
%A Fromental, Jean-Marc
%A Pomeau, Yves
%< avec comité de lecture
%Z L2C:14-197
%@ 0031-9007
%J Physical Review Letters
%I American Physical Society
%V 113
%N 17
%P 178301
%8 2014
%D 2014
%R 10.1103/PhysRevLett.113.178301
%Z Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]
%Z Engineering Sciences [physics]/Mechanics [physics.med-ph]Journal articles
%X We demonstrate the instability of the free surface of a soft elastic solid facing downwards. Experiments are carried out using a gel of constant density rho, shear modulus mu, put in a rigid cylindrical dish of depth h. When turned upside down, the free surface of the gel undergoes a normal outgoing acceleration g. It remains perfectly flat for rhogh/mu<alpha^{*} with alpha^{*}≃6, whereas a steady pattern spontaneously appears in the opposite case. This phenomenon results from the interplay between the gravitational energy and the elastic energy of deformation, which reduces the Rayleigh waves celerity and vanishes it at the threshold.
%G English
%2 https://hal.science/hal-01101059/document
%2 https://hal.science/hal-01101059/file/Mora_al_Gravity_driven_instability_Phys.Rev.Lett._2014.pdf
%L hal-01101059
%U https://hal.science/hal-01101059
%~ CNRS
%~ LMGC
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021