DAVIS-PURCELL, Benjamin; SOULARD, Pierre; SALEZ, Thomas; RAPHAËL, Elie; DALNOKI-VERESS, Kari

doi:10.1140/epje/i2018-11643-6

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DAVIS-PURCELL, Benjamin
Department of Physics and Astronomy [Hamilton, ON]

SOULARD, Pierre
Laboratoire de Physico-Chimie Théorique [LPCT]

SALEZ, Thomas
Laboratoire Ondes et Matière d'Aquitaine [LOMA]
Hokkaido University [Sapporo, Japan]

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European Physical Journal E: Soft matter and biological physics. 2018, vol. 41, n° 3, p. 36

EDP Sciences: EPJ

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In this study, thin elastic films supported on a rigid substrate are brought into contact with a spherical glass indenter. Upon contact, adhesive fingers emerge at the periphery of the contact patch with a characteristic wavelength. Elastic films are also pre-strained along one axis before the initiation of contact, causing the fingering pattern to become anisotropic and align with the axis along which the strain was applied. This transition from isotropic to anisotropic patterning is characterized quantitatively and a simple model is developed to understand the origin of the anisotropy.< Réduire

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Adhesion-induced fingering instability in thin elastic films under strain

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