期刊
SMART MATERIALS AND STRUCTURES
卷 24, 期 7, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/24/7/075009
关键词
wrinkle; band gap; phononic crystal; surface instability
High-amplitude wrinkle formation is employed to propose a one-dimensional phononic crystal slab consists of a thin film bonded to a thick compliant substrate. Buckling induced surface instability generates a wrinkly structure triggered by a compressive strain. It is demonstrated that a surface periodic pattern and corresponding stress can control elastic wave propagation in the low thickness composite slab. Simulation results show that the periodic wrinkly structure can be used as a transformative phononic crystal that can switch the band diagram of the structure in a reversible manner. The results of this study provide opportunities for the smart design of tunable switches and frequency filters at ultrasonic and hypersonic frequency ranges.
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