Impacts on thin elastic sheets
Résumé
We study transverse impacts of rigid objects on a free elastic membrane, using thin circular sheets of natural rubber as experimental models. After impact, two distinct axisymmetric waves propagate in and on the sheet. First a tensile wave travels at sound speed leaving behind the wave front a stretched domain. Then, a transverse wave propagates on the stretched area at a lower speed. In the stretched area, geometrical confinement induces compressive circumferential stresses leading to a buckling instability, giving rise to radial wrinkles. We report on a set of experiments and theoretical remarks on the conditions of occurrence of these wrinkles, their dynamics and wavelength.
Domaines
- Mécanique des solides [physics.class-ph]
- Mécanique des solides [physics.class-ph]
- Mécanique des matériaux [physics.class-ph]
- Mécanique des matériaux [physics.class-ph]
- Physique Classique [physics.class-ph]
- Physique mathématique [math-ph]
- Physique mathématique [math-ph]
- Matériaux et structures en mécanique [physics.class-ph]
- Matériaux et structures en mécanique [physics.class-ph]
- Physique Générale [physics.gen-ph]
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