Surface Effects on Elastic Structures

Bense, Hadrien; Roman, Benoît; Bico, José

doi:10.1002/9781119687566.ch7

Mechanics and Physics of Solids at Micro‐ and Nano‐Scales 2019

DOI: 10.1002/9781119687566.ch7

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Surface Effects on Elastic Structures

Hadrien Bense¹,

Benoît Roman²,

José Bico³

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2022

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“…Introduction. -The capillary interaction of liquids with soft solids is a ubiquitous situation in natural or technological settings [1][2][3][4], ranging from droplets that interact with epithelia, for instance in the human eye [5], or epithelial cells governed by capillary physics [6], to inkjet printing on flexible materials [7]. The capillary tractions, exerted by the liquid onto their soft support, cause strong deformations if the substrate is soft or the considered length scale is sufficiently small [8,9].…”

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Stick-slip contact line motion on Kelvin-Voigt model substrates

Mokbel

Aland

Karpitschka

2022

EPL

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The capillary traction of a liquid contact line causes highly localized deformations in soft solids, tremendously slowing down wetting and dewetting dynamics by viscoelastic braking. Enforcing nonetheless large velocities leads to the so-called stick-slip instability, during which the contact line periodically depins from its own wetting ridge. The mechanism of this periodic motion and, especially, the role of the dynamics in the ﬂuid have remained elusive, partly because a theoretical description of the unsteady soft wetting problem is not available so far. Here we present the ﬁrst numerical simulations of the full unsteady soft wetting problem, with a full coupling between the liquid and the solid dynamics. We observe three regimes of soft wetting dynamics: steady viscoelastic braking at slow speeds, stick-slip motion at intermediate speeds, followed by a region of viscoelastic braking where stick-slip is suppressed by liquid damping, which ultimately gives way to classical wetting dynamics, dominated by liquid dissipation.

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mentioning

confidence: 99%

Stick-slip contact line motion on Kelvin-Voigt model substrates

Mokbel

Aland

Karpitschka

2022

EPL

View full text Add to dashboard Cite

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Surface Effects on Elastic Structures

Cited by 1 publication

References 31 publications

Stick-slip contact line motion on Kelvin-Voigt model substrates

Stick-slip contact line motion on Kelvin-Voigt model substrates

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