Universal scaling laws for metallic wrinkling on soft spherical substrates. (1st January 2021)

• Record Type: Journal Article
• Authors: Yuan, Haozhi; Wu, Kai; Wang, Yaqiang; Zhang, Jinyu; Liu, Gang; Sun, Jun
• Is Part Of: Scripta materialia. Number 190(2021)
• Page Start: 12
• Page End: 15
• Publication Date: 2021-01-01
• Subjects: Wrinkling -- Metallic films -- Spherical substrates -- Wrinkle wavelength -- Scaling laws; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.08.020
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : The surface wrinkling of metal films on spherical polydimethylsiloxane (PDMS) substrates was induced by thermal contraction. A novel scaling law among wrinkle wavelength, film thickness, and substrate radius was discovered experimentally and rationalized theoretically, with scaling exponent being constant and coefficient being material-dependent. The theoretical predictions agree well with the existing experimental data of other spherical shell/core systems, with shell/core modulus ratio spanning several orders of magnitude, indicative of the universality and robustness. The results shed new light on the wrinkling phenomenon of spherical surfaces and demonstrate a predictive pathway to create wrinkling patterns on demand. Graphical abstract: Image, graphical abstract