Digital Repository, ICF12, Ottawa 2009

Font Size: 
Impacts on thin elastic sheets
N. Vandenberghe, R. Vermorel, E. Villermaux

Last modified: 2013-05-07


We study transverse impacts of rigid objects on a free membrane. The thin elastic
sheet is made of natural rubber. After impact, two distinct waves propagate in the
sheet. First a tensile wave travels at the speed of sound leaving behind the wave
front a stretched domain. Then a flexural wave propagates in the stretched area at
a lower speed. In the stretched area geometrical confinement induces compressive
circumferential stresses. They trigger a buckling instability giving rise to radial
wrinkles. In this paper we report on an experimental and theoretical study of this
dynamic wrinkling.

Full Text: PDF