title: Inertial and stick-slip regimes of unstable adhesive tape peeling.
abstract: We present an experimental characterization of the detachment front unstable dynamics observed during the peeling of pressure sensitive adhesives. We use an experimental set-up specifically designed to control the peeling angle θ and the peeled tape length L, while peeling an adhesive tape from a flat substrate at a constant driving velocity V. High-speed imaging allows us to report the evolution of the period and amplitude of the front oscillations, as well as the relative durations of their fast and slow phases, as a function of the control parameters V, L and θ. Our study shows that, as the driving velocity or the peeling angle increases, the oscillations of the peeling front progressively evolve from genuine "stick-slip" oscillations, made of alternating long stick phases and very brief slip phases, to sinusoidal oscillations of amplitude twice the peeling velocity. We propose a model which, taking into account the peeling angle-dependent kinetic energy cost to accelerate and decelerate the peeled tape, explains the transition from the "stick-slip" to the "inertial" regime of the dynamical instability. Using independent direct measurements of the effective fracture energy of the adhesive-substrate joint, we show that our model quantitatively accounts for the two regimes of the unstable dynamics.
authors.affiliation: Univ Lyon, Ens de Lyon, Univ Claude Bernard, CNRS, Laboratoire de Physique, France. stephane.santucci@ens-lyon.fr and Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, France. loic.vanel@univ-lyon1.fr.
authors.forename: Marie-Julie
authors.initials: MJ
authors.lastname: Dalbe
authors.affiliation: Laboratoire FAST, CNRS, Univ. Paris-Sud, Université Paris-Saclay, France. ppcortet@fast.u-psud.fr and Laboratoire SIMM, UMR7615 ESPCI-CNRS-UPMC-PSL, France. mateo.ciccotti@espci.fr.
authors.forename: Richard
authors.initials: R
authors.lastname: Villey
authors.affiliation: Laboratoire SIMM, UMR7615 ESPCI-CNRS-UPMC-PSL, France. mateo.ciccotti@espci.fr.
authors.forename: Matteo
authors.initials: M
authors.lastname: Ciccotti
authors.affiliation: Univ Lyon, Ens de Lyon, Univ Claude Bernard, CNRS, Laboratoire de Physique, France. stephane.santucci@ens-lyon.fr.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Santucci
authors.affiliation: Laboratoire FAST, CNRS, Univ. Paris-Sud, Université Paris-Saclay, France. ppcortet@fast.u-psud.fr.
authors.forename: Pierre-Philippe
authors.initials: PP
authors.lastname: Cortet
authors.affiliation: Institut Lumière Matière, UMR5306 Université Claude Bernard Lyon 1-CNRS, Université de Lyon, France. loic.vanel@univ-lyon1.fr.
authors.forename: Loïc
authors.initials: L
authors.lastname: Vanel