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Impacts on thin elastic sheets
Last modified: 2013-05-07
Abstract
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.
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.
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