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Issue 22, 2011
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Adhesive contact between a rippled elastic surface and a rigid spherical indenter: from partial to full contact

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Abstract

Surface mechanical properties such as adhesion and friction can be controlled by creating a rippled surface. In this paper, we present numerical and experimental studies on adhesive contact between a rippled surface and a rigid spherical indenter. In our numerical method, surface interaction is modeled using Lennard-Jones potential with Derjaguin's approximation. We also carry out a systematic experimental investigation by measuring the adhesion between a spherical glass indenter and rippled polydimethylsiloxane (PDMS) strips with varying amplitudes. With increasing ripple amplitude, our experimental results show a monotonic decrease in pull-off force, transition from full to partial contact, and pressure-sensitive adhesion. Our numerical simulation captures all the salient features of the experimental results remarkably well.

Graphical abstract: Adhesive contact between a rippled elastic surface and a rigid spherical indenter: from partial to full contact

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Publication details

The article was received on 19 Jul 2011, accepted on 26 Aug 2011 and first published on 05 Oct 2011


Article type: Paper
DOI: 10.1039/C1SM06367G
Citation: Soft Matter, 2011,7, 10728-10736
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    Adhesive contact between a rippled elastic surface and a rigid spherical indenter: from partial to full contact

    C. Jin, K. Khare, S. Vajpayee, S. Yang, A. Jagota and C. Hui, Soft Matter, 2011, 7, 10728
    DOI: 10.1039/C1SM06367G

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