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We report a comprehensive investigation of a model for peeling of an adhesivetape along with a nonlinear time series analysis of experimental acousticemission signals in an effort to understand the origin of intermittent peelingof an adhesive tape and its connection to acoustic emission. The modelrepresents the acoustic energy dissipated in terms of Rayleigh dissipationfunctional that depends on the local strain rate. We show that the nature ofthe peel front exhibits rich spatiotemporal patterns ranging from smooth,rugged and stuck-peeled configurations that depend on three parameters, namely,the ratio of inertial time scale of the tape mass to that of the roller, thedissipation coefficient and the pull velocity. The stuck-peeled configurationsare reminiscent of fibrillar peel front patterns observed in experiments. Weshow that while the intermittent peeling is controlled by the peel forcefunction, the model acoustic energy dissipated depends on the nature of thepeel front and its dynamical evolution. Even though the acoustic energy is afully dynamical quantity, it can be quite noisy for a certain set of parametervalues suggesting the deterministic origin of acoustic emission in experiments.To verify this suggestion, we have carried out a dynamical analysis ofexperimental acoustic emission time series for a wide range of tractionvelocities. Our analysis shows an unambiguous presence of chaotic dynamicswithin a subinterval of pull speeds within the intermittent regime. Time seriesanalysis of the model acoustic energy signals is also found to be chaoticwithin a subinterval of pull speeds.

Intermittent Peel Front Dynamics and the Crackling Noise in an Adhesive Tape