Line creep in paper peeling

TL;DR

This study investigates the creep dynamics of a peeling front, revealing avalanche behaviors consistent with depinning models but with additional complexities, and relates findings to geophysical phenomena.

Contribution

It provides experimental evidence linking line creep dynamics to depinning models and explores avalanche correlations and their implications.

Findings

Creep velocity depends exponentially on inverse force.

Avalanche statistics resemble depinning model predictions.

Internal avalanche dynamics follow depinning-like behavior, with some subtle deviations.

Abstract

The dynamics of a "peeling front" or an elastic line is studied under creep (constant load) conditions. Our experiments show an exponential dependence of the creep velocity on the inverse force (mass) applied. In particular, the dynamical correlations of the avalanche activity are discussed here. We compare various avalanche statistics to those of a line depinning model with non-local elasticity, and study various measures of the experimental avalanche-avalanche and temporal correlations such as the autocorrelation function of the released energy and aftershock activity. From all these we conclude, that internal avalanche dynamics seems to follow "line depinning" -like behavior, in rough agreement with the depinning model. Meanwhile, the correlations reveal subtle complications not implied by depinning theory. Moreover, we also show how these results can be understood from a geophysical point of view.