Universal scaling laws for metallic wrinkling on soft spherical substrates

Universal scaling laws for metallic wrinkling on soft spherical substrates
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软球形基底上金属起皱的通用缩放定律

DOI:
10.1016/j.scriptamat.2020.08.020
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发表时间:
2021
期刊:
影响因子:
6
通讯作者:
Sun Jun
Sun Jun
中科院分区:
材料科学1区
文献类型:
--
作者:
Yuan Haozhi;Wu Kai;Wang Yaqiang;Zhang Jinyu;Liu Gang;Sun Jun

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研究了热收缩作用下球形聚二甲基硅氧烷(PDMS)表面金属薄膜的起皱现象。实验发现了皱折波长、薄膜厚度和衬底半径之间的一种新的标度规律,并对其进行了理论合理化,其中标度指数为常数,系数与材料有关。理论预测与已有的其他球壳/核系统的实验数据吻合较好,壳/核模比跨越了几个数量级,表明了理论预测的通用性和鲁棒性。研究结果揭示了球形表面起皱现象的新亮点,并展示了一种预测途径,可以根据需要创建起皱图案。
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.
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