How Surface Stress Transforms Surface Profiles and Adhesion of Rough Elastic Bodies

Overview

Journal Proc Math Phys Eng Sci

Date 2020 Dec 28

PMID 33362416

Authors

Chung-Yuen Hui

Zezhou Liu

Nicolas Bain

Anand Jagota

Eric R Dufresne

Robert W Style

Ryuji Kiyama

Jian Ping Gong

Affiliations

Soon will be listed here.

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.

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