Impacts on thin elastic sheets

  • Vermorel R
  • Vandenberghe N
  • Villermaux E
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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.

Author-supplied keywords

  • Buckling
  • Impact
  • Membrane
  • Wrinkling

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