How short-range adhesion slows down crack closure and contact formation.

J Chem Phys

Department of Materials Science and Engineering, Saarland University, 66123 Saarbrücken, Germany.

Published: December 2023

While viscoelastic, adhesive contact rupture of simple indenters is well studied, contact formation has received much less attention. Here, we present simulations of the formation of contact between various power law indenters and an adhesive, viscoelastic foundation. For all investigated indenters, we find that the macroscopic relaxation time τ scales approximately with 1/ρ1.8, where ρ is the range of adhesion. The prolongation of contact formation with Tabor parameter is rationalized by the increased dissipation that short-range adhesion causes on a moving crack.

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http://dx.doi.org/10.1063/5.0174379DOI Listing

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