EAGER: Multifunctional Cellular Metacomposite: Low Frequency Noise Absorber and Energy Harvesting

EAGER项目的目标是通过微结构设计开发一种新型的多功能蜂窝复合材料，该复合材料与超材料响应之间具有相互作用。作为一种上级轻、薄、强的结构材料，超复合材料将同时起到衰减低频噪声（LFN）和低频振动（LFV）的作用，并通过压电效应将有害的LFN和LFV能量转化为可用的电能。该研究为评价声学超材料的性能和理解其微结构机理提供了理论基础。如果成功的话，本研究的理论和方法将导致工业工程应用。所提出的设计还有望加速用于能量收集的声学多功能元复合材料，这是廉价，清洁和非常有效的。超材料的实际工程应用仍处于概念阶段，还没有真实的声学蜂窝超复合材料被开发出来。这是一项高风险但潜在影响高的研究。本课题的研究对超材料声学和新型功能材料的设计具有重要意义。该研究将为低频振动抑制、低频噪声滤波和绿色能量采集等机械系统的设计提供新的范例。该研究允许学生将分析，数值和实验方法融入他们的教育和研究计划，这将大大有助于学员的独立研究生涯。这项工作将对UALR和周边地区产生深刻和持久的教育和推广效益。

The objective of this EAGER project is to develop a novel multifunctional cellular metacomposite with interplay between a cellular composite and metamaterial response through microstructure design. As a superior lightweight, thin and strong structural material, the metacomposite will simultaneously serve to attenuate low frequency noise (LFN) and low frequency vibration (LFV), and convert hazardous LFN and LFV energy into usable electric energy through the piezoelectric effect. The study will provide a theoretical foundation to evaluate acoustic metamaterials and understand microstructure mechanism. If successful, the theory and approaches in this research will lead to industrial engineering applications. The proposed design also promises to accelerate acoustic multifunctional metacomposites for energy harvesting, which is cheap, clean and very efficient. Practical engineering applications of metamaterials are still in the conceptual stage and no real acoustic cellular metacomposite have been developed. This is a high-risk, but potentially high impact study. The subject of this research is of fundamental interest to acoustic metamaterials and novel functional material design. This research will provide a new paradigm for design of mechanical systems such as low-frequency vibration suppression, low-frequency noise filter and green energy harvesting. The research allows students to integrate analytical, numerical and experimental approaches into their education and research programs, which will significantly contribute to the independent research career of the trainees. This work will have deep and lasting educational and outreach benefits to UALR and the surrounding region.