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How surface stress transforms surface profiles and adhesion of rough elastic bodies.

ABSTRACT: The surface of soft solids carries a surface stress that tends to flatten surface profiles. For example, surface features on a soft solid, fabricated by moulding against a stiff-patterned substrate, tend to flatten upon removal from the mould. In this work, we derive a transfer function in an explicit form that, given any initial surface profile, shows how to compute the shape of the corresponding flattened profile. We provide analytical results for several applications including flattening of one-dimensional and two-dimensional periodic structures, qualitative changes to the surface roughness spectrum, and how that strongly influences adhesion.

SUBMITTER: Hui CY

PROVIDER: S-EPMC7735300 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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How surface stress transforms surface profiles and adhesion of rough elastic bodies.

Hui Chung-Yuen CY Liu Zezhou Z Bain Nicolas N Jagota Anand A Dufresne Eric R ER Style Robert W RW Kiyama Ryuji R Gong Jian Ping JP

Proceedings. Mathematical, physical, and engineering sciences 20201104 2243

The surface of soft solids carries a surface stress that tends to flatten surface profiles. For example, surface features on a soft solid, fabricated by moulding against a stiff-patterned substrate, tend to flatten upon removal from the mould. In this work, we derive a transfer function in an explicit form that, given any initial surface profile, shows how to compute the shape of the corresponding flattened profile. We provide analytical results for several applications including flattening of o ...[more]

PMID: 33362416

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