Torsion-induced stick-slip phenomena in the delamination of soft adhesives
Name
d2sm01675c.pdf
Description
Published version
Size
1.66 MB
Format
Adobe PDF
Checksum (MD5)
e973b8631305c95f0c14ca1bdee32d76
Author(s)
Venkatadri, Tara K
Henzel, Thomas
Cohen, Tal
Date Issued
March 15, 2023
Journal
Soft Matter
Publisher
Royal Society of Chemistry (RSC)
Citation
Venkatadri, Tara K, Henzel, Thomas and Cohen, Tal. 2023. "Torsion-induced stick-slip phenomena in the delamination of soft adhesives." Soft Matter.
Version
Final published version
Abstract
Soft adhesive contacts are ubiquitous in nature and are increasingly used in synthetic systems, such as flexible electronics and soft robots, due to their advantages over traditional joining techniques. While methods to study the failure of adhesives typically apply tensile loads to the adhesive joint, less is known about the performance of soft adhesives under shear and torsion, which may become important in engineering applications. A major challenge that has hindered the characterization of shear/torsion-induced delamination is imposed by the fact that, even after delamination, contact with the substrate is maintained, thus allowing for frictional sliding and re-adhesion. In this work, we address this gap by studying the controlled delamination of soft cylinders under combined compression and torsion. Our experimental observations expose the nucleation of delamination at an imperfection and its propagation along the circumference of the cylinder. The observed sequence of ‘stick-slip’ events and the sensitivity of the delamination process to material parameters are explained by a theoretical model that captures axisymmetric delamination patterns, along with the subsequent frictional sliding and re-adhesion. By opening up an avenue for improved characterization of adhesive failure, our experimental approach and theoretical framework can guide the design of adhesives in future applications.
MIT Department
Massachusetts Institute of Technology. Department of Aeronautics and Astronautics
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Creative Commons Attribution NonCommercial License 3.0
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DOI of Published Version
https://doi.org/10.1039/d2sm01675c
