Self-Adaptive Electromechanical Metamaterials

自适应机电超材料

• 批准号: 2038187
• 负责人: Oumar Barry
• 金额: $ 33.4万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-02-01 至 2024-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2038187&HistoricalAwards=false
• 关键词: Self; Adaptive; Electromechanical; Metamaterials

This grant will support research on nonlinear vibrations and wave propagation to enable the development of new multi-functional metamaterial devices, thus promoting both the progress of science and advancing national prosperity. Metamaterials are artificially engineered materials used to manipulate and control sound, light, and many other physical phenomena. These materials have proven to be useful in many applications such as ultrasonic, vibration mitigation, energy harvesting, and sensing (e.g., complex filtering, light channeling). However, most mechanical energy control devices currently available operate in a narrow frequency range and cannot adapt to changing frequency. This award will support fundamental research to provide needed knowledge for the design and fabrication of self-adaptive metamaterials that can achieve a wide frequency self-tuning range. The new self-adaptive metamaterial can be easily integrated into various engineering structures (e.g., automotive or aircraft components) to enable low-cost and reliable vibration mitigation, energy harvesting, and sensing techniques. Other systems and applications that will also benefit from this research include absorbers for wind-induced vibration control, as well as self-powered sensors for real-time monitoring of gas turbines and civil infrastructure. The broader impacts of the project include inclusion of students from underrepresented groups, mentoring and training of undergraduate and graduate students, and integration of the research findings in classroom materials. The self-adaptive metamaterial will be designed using the concept of passive self-tuning via a sliding mass, and quasiperiodic arrangements of the local resonators. The primary objective of this research is to gain fundamental understanding of the nonlinear dynamic interactions within such an electromechanical metamaterial. The secondary objective is to test the hypothesis that the interplay between quasiperiodic arrangements and self-tunability in metamaterials can improve the performance of vibration mitigation and energy harvesting or sensing. To address this problem, the research team will conduct a combination of theoretical, computational, and experimental analyses. Quasiperiodicity in the local resonators will be examined for the purpose of realizing tunable-topological bandgaps. The team will investigate how localized topologically protected modes can be harnessed to improve energy harvesting and sensing while conserving vibration mitigation performance. Prototypes of the self-adaptive metamaterial will be fabricated, and rigorous experiments will be conducted to validate and refine the theoretical development. It is anticipated that the self-adaptive metastructure will provide unprecedented performance characteristics for a wide range of engineering applications.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这笔赠款将支持非线性振动和波传播的研究，以开发新型多功能超材料器件，从而促进科学进步和国家繁荣。超材料是用于操纵和控制声音、光和许多其他物理现象的人工工程材料。这些材料已被证明可用于许多应用，例如超声波、减振、能量收集和传感（例如复杂过滤、光通道）。然而，目前可用的机械能控制装置大多工作在较窄的频率范围内，不能适应不断变化的频率。该奖项将支持基础研究，为自适应超材料的设计和制造提供所需的知识，从而实现较宽的频率自调谐范围。新型自适应超材料可以轻松集成到各种工程结构（例如汽车或飞机部件）中，以实现低成本且可靠的减振、能量收集和传感技术。其他系统和应用也将从这项研究中受益，包括用于风致振动控制的吸收器，以及用于实时监控燃气轮机和民用基础设施的自供电传感器。该项目更广泛的影响包括纳入来自代表性不足群体的学生、对本科生和研究生进行指导和培训，以及将研究成果纳入课堂材料。自适应超材料将采用通过滑动质量进行被动自调节的概念以及局部谐振器的准周期布置来设计。这项研究的主要目的是获得对这种机电超材料内非线性动态相互作用的基本了解。第二个目标是检验超材料中准周期排列和自调节性之间的相互作用可以提高减振和能量收集或传感性能的假设。为了解决这个问题，研究小组将进行理论、计算和实验分析相结合。为了实现可调谐拓扑带隙，将检查局部谐振器的准周期性。该团队将研究如何利用局部拓扑保护模式来改善能量收集和传感，同时保持减振性能。将制造自适应超材料的原型，并进行严格的实验来验证和完善理论发展。预计自适应元结构将为广泛的工程应用提供前所未有的性能特征。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Broadband Electromechanical Diode: Acoustic Non-Reciprocity in Weakly Nonlinear Metamaterials With Electromechanical Resonators

宽带机电二极管：具有机电谐振器的弱非线性超材料中的声学非互易性

• DOI: 10.1115/1.4054962
• 发表时间: 2023
• 期刊: Journal of Vibration and Acoustics
• 作者: Bukhari, Mohammad;Barry, Oumar
• 通讯作者: Barry, Oumar

Substantial frequency conversion at long-wavelength limit in metamaterial with weakly nonlinear local electromechanical resonators: Analytical, computational, and experimental study

• DOI: 10.1016/j.ijnonlinmec.2022.104226
• 发表时间: 2022-09
• 期刊: International Journal of Non-Linear Mechanics
• 影响因子: 3.2
• 作者: M. Bukhari;O. Barry

ANALYSIS OF A NONLINEAR LOCALLY RESONANT METAMATERIAL WITH RESISTANCE-INDUCTANCE SHUNT

具有阻感分流器的非线性局部谐振超材料的分析

• 发表时间: 2022
• 期刊: International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
• 作者: Arun Malla, Mohammad Bukhari

Breather propagation and arrest in a strongly nonlinear locally resonant lattice

强非线性局部谐振晶格中的呼吸传播和停止

• DOI: 10.1016/j.ymssp.2022.109623
• 发表时间: 2023
• 期刊: Mechanical Systems and Signal Processing
• 影响因子: 8.4
• 作者: Bukhari, Mohammad A.;Barry, Oumar R.;Vakakis, Alexander F.
• 通讯作者: Vakakis, Alexander F.

TOPOLOGICAL PROPERTIES AND LOCALIZED VIBRATION MODES IN QUASIPERIODIC METAMATERIALS WITH ELECTROMECHANICAL LOCAL RESONATORS

具有机电局域谐振器的准周期超材料的拓扑特性和局域振动模式

• 发表时间: 2022
• 期刊: International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
• 作者: Joshua LeGrande, Mohammad Bukhari