000015456 001__ 15456 000015456 005__ 20161115100222.0 000015456 04107 $$aeng 000015456 046__ $$k2016-08-21 000015456 100__ $$aMora, Serge 000015456 24500 $$aGravity driven instability in horizontal elastic layers 000015456 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers 000015456 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016 000015456 506__ $$arestricted 000015456 520__ $$2eng$$aWe demonstrate the instability of the free surface of a soft elastic layer facing downwards. Experiments are carried out using a system consisting in a gel of constant density p and shear modulus u, 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 pgh/u < 04* with 04* 2 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 of the system. 000015456 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb. 000015456 653__ $$a 000015456 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016 000015456 720__ $$aMora, Serge 000015456 8560_ $$ffischerc@itam.cas.cz 000015456 8564_ $$s246545$$uhttps://invenio.itam.cas.cz/record/15456/files/TS.SM14-3.03.pdf$$yOriginal version of the author's contribution as presented on CD, page 2792, code TS.SM14-3.03 . 000015456 962__ $$r13812 000015456 980__ $$aPAPER