Adhesive tape loops
Krishnan Suryanarayanan, Andrew B. Croll, Harmeet Singh

TL;DR
This study investigates the mechanics of adhesive tape loops through experiments and modeling, revealing how adhesion strength and overlap influence their equilibrium states.
Contribution
It introduces a combined experimental and theoretical framework to understand adhesive tape loop behavior, including a simple scaling argument and Kirchhoff rod theory.
Findings
Experimental validation of loop states with PDMS tape.
Theoretical predictions match observed loop shapes and states.
Potential to measure self-adhesion strength from minimal equilibrium overlap.
Abstract
We present an experimental and theoretical study of the mechanics of an \emph{adhesive tape loop}, formed by bending a straight rectangular strip with adhesive properties, and prescribing an overlap between the two ends. For a given combination of the adhesive strength and the extent of the overlap, the loop may unravel, it may stay in equilibrium, or open up quasi-statically to settle into an equilibrium with a smaller overlap. We define the state space of an adhesive tape loop with two parameters: a non-dimensional adhesion strength, and the extent of overlap normalized by the total length of the loop. We conduct experiments with adhesive tape loops fabricated out of sheets of polydimethylsiloxane (PDMS) and record their states. We rationalize the experimental observations using a simple scaling argument, followed by a detailed theoretical model based on Kirchhoff rod theory. The…
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