Creasing in microscale, soft static friction.

Autor: Glover JD; Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506, USA., Yang X; Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO, 80309, USA., Long R; Department of Mechanical Engineering, University of Colorado Boulder, Boulder, CO, 80309, USA., Pham JT; Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40506, USA. Jonathan.Pham@uc.edu.; Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH, 45221, USA. Jonathan.Pham@uc.edu.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2023 Apr 24; Vol. 14 (1), pp. 2362. Date of Electronic Publication: 2023 Apr 24.
DOI: 10.1038/s41467-023-38091-7
Abstrakt: Utilizing colloidal probe, lateral force microscopy and simultaneous confocal microscopy, combined with finite element analysis, we investigate how a microparticle starts moving laterally on a soft, adhesive surface. We find that the surface can form a self-contacting crease at the leading front, which results from a buildup of compressive stress. Experimentally, creases are observed on substrates that exhibit either high or low adhesion when measured in the normal direction, motivating the use of simulations to consider the role of adhesion energy and interfacial strength. Our simulations illustrate that the interfacial strength plays a dominating role in the nucleation of a crease. After the crease forms, it progresses through the contact zone in a Schallamach wave-like fashion. Interestingly, our results suggest that this Schallamach wave-like motion is facilitated by free slip at the adhesive, self-contacting interface within the crease.
(© 2023. The Author(s).)
Databáze: MEDLINE
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