Peeling-angle dependence of the stick-slip instability during adhesive tape peeling

Marie-Julie Dalbe 1 Stéphane Santucci 1 Loïc Vanel 2 Pierre-Philippe Cortet 3
1 Phys-ENS - Laboratoire de Physique de l'ENS Lyon
2 ILM - Institut Lumière Matière [Villeurbanne]
3 FAST - Fluides, automatique, systèmes thermiques
Abstract : The influence of peeling angle on the dynamics observed during the stick-slip peeling of an adhesive tape has been investigated. This study relies on a new experimental setup for peeling at constant driving velocity while keeping constant the peeling angle and peeled tape length. The thresholds of the instability are shown to be associated with a subcritical bifurcation and a bistability of the system. The velocity onset of the instability is moreover revealed to strongly depend on the peeling angle. This could be the consequence of a peeling angle dependance of either the fracture energy of the adhesive-substrate joint or the effective stiffness at play between the peeling front and the point at which the peeling is enforced. The shape of the peeling front velocity fluctuations is finally shown to progressively change from typical stick-slip relaxation oscillations to nearly sinusoidal oscillations as the peeling angle is increased. We suggest that this transition might be controlled by inertial effects possibly associated to the propagation of the peeling force fluctuations through elongation waves in the peeled tape.
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Marie-Julie Dalbe, Stéphane Santucci, Loïc Vanel, Pierre-Philippe Cortet. Peeling-angle dependence of the stick-slip instability during adhesive tape peeling. Soft Matter, Royal Society of Chemistry, 2014, 10 (48), pp.9637-9643. ⟨10.1039/C4SM01840K⟩. ⟨hal-01727329⟩

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