Gradient honeycomb metastructure with broadband microwave absorption and effective mechanical resistance

被引:2
|
作者
Li, Dongmeng [1 ]
Zheng, Xia [1 ]
Gu, Hao [1 ]
Xuan, Xiaobo [1 ]
Liu, Bing [1 ]
Feng, Hongquan [1 ]
Zhang, Fuheng [1 ]
机构
[1] Shanghai Radio Equipment Res Inst, Shanghai 200438, Peoples R China
基金
中国国家自然科学基金;
关键词
Multifunctional metastructure; Broadband microwave absorption; Impedance gradient calculation; Mechanical characteristics; Finite element analysis; DESIGN; METAMATERIALS; CORE;
D O I
10.1016/j.nanoms.2023.09.005
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Multifunctional metastructure integrated broadband microwave absorption and effective mechanical resistance has attracted much attention. However, multifunctional performance is limited by the lack of theoretical approaches to integrated design. Herein, a multi-layer impedance gradient honeycomb (MIGH) was designed through theoretical analysis and simulation calculation, and fabricated using 3D printing technique. A theoretical calculation strategy for impedance gradient structure was established based on the electromagnetic parameter equivalent method and the multi-layer finite iterative method. The impedance of MIGH was analyzed by the theoretical calculation strategy to resolve the broadband absorption. Intrinsic loss mechanism of matrix materials and distributions of electric fields, magnetic fields and power loss were analyzed to investigate the absorption mechanism. Experimental results indicated that a 15 mm thick designed metastructure can achieve the absorption more than 88.9% in the frequency range of 2-18 GHz. Moreover, equivalent mechanical parameters of MIGH was calculated by integral method according to the Y-shaped model. Finite Element analysis of stress distributions were carried out to predict the deformation behavior. Mechanical tests demonstrate that MIGH achieved the compression modulus of 22.89 MPa and flexure modulus of 17.05 MPa. The integration of broadband electromagnetic absorption and effective mechanical resistance was achieved by the proposed design principle and fabrication methodology.
引用
收藏
页码:456 / 466
页数:11
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