Double-layer metasurface for blocking the fundamental SH wave

IF 3.7 3区 材料科学 Q1 INSTRUMENTS & INSTRUMENTATION Smart Materials and Structures Pub Date : 2024-08-29 DOI:10.1088/1361-665x/ad7215
Hongchen Miao, Xi Cao, Mingtao Fu
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Abstract

This work introduces a double-layer metasurface to isolate the fundamental shear horizontal wave (SH0 wave). The metasurface is designed to split the SH0 wave source into two parts and then manipulate the two waves to be out of phase and have equal amplitude upon reaching the end of the metasurface. This results in interference cancellation, effectively blocking the propagation of SH0 waves into the protected zone. Firstly, the metasurface is designed theoretically, utilizing rectangular strips to constitute the substructure. Subsequently, finite element simulations are conducted to verify the correctness of the theoretical design. Finally, the metasurface is fabricated using 3D printing, and its performance is evaluated through experiments. The results indicate that the metasurface can function as a cage for SH0 waves, trapping different types of SH0 waves located at any position within the cage. Furthermore, when the source of SH0 waves is positioned outside the cage, the metasurface can effectively impede their propagation into the interior region of the cage. The proposed double-layer metasurface provides a simple approach to blocking SH0 waves, which may have potential applications in practical engineering.
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用于阻挡 SH 基波的双层元表面
这项研究引入了一种双层元面来隔离基本剪切水平波(SH0 波)。元表面的设计目的是将 SH0 波源分成两部分,然后在到达元表面末端时将两波处理为相位不一致且振幅相等。这样就能消除干扰,有效阻止 SH0 波向保护区传播。首先,对元表面进行理论设计,利用矩形条构成下部结构。随后,进行有限元模拟以验证理论设计的正确性。最后,利用三维打印技术制作了元表面,并通过实验对其性能进行了评估。结果表明,元表面可以充当 SH0 波的笼子,捕获位于笼子内任何位置的不同类型的 SH0 波。此外,当 SH0 波源位于笼子外部时,元表面能有效地阻止它们向笼子内部区域传播。所提出的双层元表面为阻挡 SH0 波提供了一种简单的方法,在实际工程中具有潜在的应用价值。
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来源期刊
Smart Materials and Structures
Smart Materials and Structures 工程技术-材料科学:综合
CiteScore
7.50
自引率
12.20%
发文量
317
审稿时长
3 months
期刊介绍: Smart Materials and Structures (SMS) is a multi-disciplinary engineering journal that explores the creation and utilization of novel forms of transduction. It is a leading journal in the area of smart materials and structures, publishing the most important results from different regions of the world, largely from Asia, Europe and North America. The results may be as disparate as the development of new materials and active composite systems, derived using theoretical predictions to complex structural systems, which generate new capabilities by incorporating enabling new smart material transducers. The theoretical predictions are usually accompanied with experimental verification, characterizing the performance of new structures and devices. These systems are examined from the nanoscale to the macroscopic. SMS has a Board of Associate Editors who are specialists in a multitude of areas, ensuring that reviews are fast, fair and performed by experts in all sub-disciplines of smart materials, systems and structures. A smart material is defined as any material that is capable of being controlled such that its response and properties change under a stimulus. A smart structure or system is capable of reacting to stimuli or the environment in a prescribed manner. SMS is committed to understanding, expanding and dissemination of knowledge in this subject matter.
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