Regulating wrinkling patterns by periodic surface stiffness in film-substrate structures
Regulating wrinkling patterns by periodic surface stiffness in film-substrate structures
复制标题
通过薄膜基材结构中的周期性表面刚度调节起皱模式
DOI：
10.1007/s11431-018-9390-3
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Feng XiQiao
中科院分区：
文献类型：
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作者：
Li Bo;Zeng ChongQing;Yin Sifan;Feng XiQiao
材料表面起皱在多功能表面和生物医学工程等领域有着重要的应用前景。对于这些应用，获得具有可调谐波长和振幅的各种表面皱纹是很有意义的。通过实验和数值模拟相结合，我们提出了一种通过引入周期性表面刚度来调节薄膜-衬底系统中的起皱模式的方法，该表面刚度是通过连续指定的紫外线臭氧（UVO）处理产生的。实验和数值模拟结果表明，该方法可以产生具有宽、可调的几何特征和各向异性的各种图案。研究了表面刚度分布、uvo处理的暴露时间和载荷双轴性对生成的表面图案的影响。
Surface wrinkling of materials holds promise for important applications in diverse fields such as multifunctional surfaces and biomedical engineering. For these applications, it is of interest to attain various surface wrinkles with tunable wavelengths and amplitudes. Through a combination of experiments and numerical simulations, we here propose a method to regulate the wrinkling patterns in a film-substrate system by introducing periodic surface stiffness, which is generated through sequential specified ultraviolet-ozone (UVO) treatments. Both experiments and numerical simulations demonstrate that the proposed technique can produce various patterns with wide, tunable geometrical features and anisotropy. The effects of surface stiffness distribution, the exposure durations of UVO-treatments, and the loading biaxiality are examined on the generated surface patterns.