3D radar stealth composite hierarchical grid structure with extremely broadband absorption performance and effective load bearing
3D radar stealth composite hierarchical grid structure with extremely broadband absorption performance and effective load bearing
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3D雷达隐身复合分层网格结构，具有极宽带吸收性能和有效承载
DOI：
10.1016/j.compositesb.2022.110316
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发表时间：
2022-09
期刊：
影响因子：
--
通讯作者：
Linzhi Wu
中科院分区：
文献类型：
--
作者：
Zhengxian Liu;Shijie Wang;Jizheng Shao;Weikai Zhao;Guocai Yu;Linzhi Wu
具有优异的微波吸收性能和力学性能的多功能结构近年来在飞机和船舶上得到了广泛的应用，引起了人们的广泛关注。本研究将具有优异力学性能的复合层次化网格结构与极宽带三维吸收超材料完美结合，通过模塑联锁技术设计制造了一种新型吸波结构。研究了结构参数对三维雷达吸收复合层次化网格结构（3D- rachgs）吸收性能和力学性能的影响机理。反射率测量结果表明，3D-RACHGS的- 10 dB吸收带宽达到34.8 GHz (2.6-4 GHz, 6.6-40 GHz)，平均反射率为- 17.4 dB。进一步的仿真表明，宽带吸收归因于多个驻波模式。面外压缩测试结果表明，3D-RACHGS的比强度达到123.5 × 103m2/s2，证明了其有效的承载能力。构建了三维rachgs的失效机理图，预测了三维rachgs在不同结构参数下的失效模式。提出的3D-RACHGS将有助于新型结构吸收材料的蓬勃发展，在新一代多功能蒙皮和进气道中具有巨大的应用潜力。
Multifunctional structures with both excellent microwave absorption performance and mechanical properties have attracted great attentions recently due to wide applications in aircraft and ships. In this research, a novel absorption structure was designed and fabricated through molding and interlocking technology by perfectly combining the composite hierarchical grid structure with excellent mechanical properties and extremely broadband 3D absorption metamaterial. The mechanism of structural parameters affecting absorption and mechanical properties of the proposed 3D radar absorption composite hierarchical grid structure (3D-RACHGS) were investigated. The measured result of reflectivity showed that −10 dB absorption bandwidth of 3D-RACHGS achieves 34.8 GHz (2.6–4 GHz, 6.6–40 GHz) with an average reflectivity of −17.4 dB. Further simulation demonstrated that the broadband absorption is attributed to multiple stationary wave modes. The measurement result of out-of-plane compression showed that the specific strength of the 3D-RACHGS achieves 123.5 × 103m2/s2, which proves its effective load bearing. Failure mechanism map was also constructed to predict the failure mode of the 3D-RACHGS with various structural parameters. The proposed 3D-RACHGS will contribute to the vigorous development of the novel structural absorption materials and have immense potential to be used in new generation multifunctional skin and inlet.
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