Simultaneous enhancement design of polymethacrylimide foam sandwich structure with EM wave transmission and compressive properties

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE Aerospace Science and Technology Pub Date : 2024-10-11 DOI:10.1016/j.ast.2024.109656

Ruilin Huang , Linhao Cheng , Zhengjiang Ji , Guang Cui , Maoyuan Li , Leilei Yan , Yuexuan Li , Xitao Zheng

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Abstract

In this work, a novel multifunctional polymethacrylimide (PMI) foam sandwich structure with enhanced electromagnetic (EM) wave transmissivity and compressive properties is proposed aiming at the demand of high-performance radome structures for aeronautic industry. A double-parabolic-shaped copper arrays is designed and formed a spoof surface plasmon polaritons (SSPPs) structure, which was embedded into the traditional PMI foam sandwich to enhance its microwave transmission property. The simulation and experimental results indicated that the average transmissivity can be increased by 20.9% due to SSPPs structure involvement, which can restrain and regulate the propagation path of EM wave. At the same time, the polytetrafluoroethylene (PTFE) boards plated with the proposed SSPPs structure are inserted into the PMI foam core in the form of interlocking square honeycomb. The coupling effect between honeycomb and PMI foam where the buckling of honeycomb wall is restrained, leading to a significant improvement of compressive strength and energy absorption by 95% and 72%, respectively. Overall, present simultaneous enhancement design of PMI foam sandwich structure with EM wave transmission and compressive properties can provide a novel and practical design scheme of radome structure.

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具有电磁波传输和压缩特性的聚甲基丙烯酰亚胺泡沫夹层结构的同步增强设计

本研究针对航空工业对高性能雷达罩结构的需求，提出了一种新型多功能聚甲基丙烯酰亚胺（PMI）泡沫夹层结构，该结构具有更强的电磁波透射率和抗压性能。设计了双抛物线形铜阵列，并将其嵌入传统的聚甲基丙烯酸甲酯泡沫夹层中，形成了欺骗性表面等离子体极化子（SSPPs）结构，以增强其微波传输性能。仿真和实验结果表明，由于 SSPPs 结构的参与，平均透过率提高了 20.9%，从而抑制和调节了电磁波的传播路径。同时，镀有拟议的 SSPPs 结构的聚四氟乙烯（PTFE）板以互锁方形蜂窝的形式插入 PMI 泡沫芯材中。蜂窝和聚甲基丙烯酸甲酯泡沫之间的耦合效应抑制了蜂窝壁的屈曲，使抗压强度和能量吸收分别显著提高了 95% 和 72%。总之，这种同时增强电磁波传输和抗压性能的 PMI 泡沫夹层结构设计可为雷达罩结构提供一种新颖实用的设计方案。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.