Electromagnetic wave absorption and compressive behavior of a three-dimensional metamaterial absorber based on 3D printed honeycomb.
Electromagnetic wave absorption and compressive behavior of a three-dimensional metamaterial absorber based on 3D printed honeycomb.
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基于3D打印蜂窝的三维超材料吸收体的电磁波吸收和压缩行为
DOI：
10.1038/s41598-018-23286-6
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发表时间：
2018-03-19
影响因子：
4.6
通讯作者：
Qu S
中科院分区：
文献类型：
--
作者：
Jiang W;Yan L;Ma H;Fan Y;Wang J;Feng M;Qu S
航天器需要具有吸波、吸波和力学性能优良等多功能的轻量化结构。提出了一种由蜂窝和电阻膜组成的三维超材料吸波体，并采用3D打印和丝网印刷技术制备了该吸波体。仿真和实验结果表明，该三维超材料吸收体在3.53-24.00 GHz的宽频带内吸收率可达90%以上，对0° ~ 70°斜入射的横磁波的吸收效率有较大提高。压缩测试结果显示，3D打印蜂窝的压缩强度可达到10.7 MPa，密度仅为254.91 kg/m3，单位体积能量吸收Wv和单位质量能量吸收Wv分别为4.37 × 103 KJ/m3和17.14 KJ/Kg。与具有相同密度的金属晶格芯相比，峰值压缩强度和单位质量的能量吸收至少是2.2和3倍。三维超材料吸波材料优异的吸波性能和力学性能使其在工程应用中更具竞争力。
Lightweight structures with multi-functions such as electromagnetic wave absorption and excellent mechanical properties are required in spacecraft. A three-dimensional metamaterial absorber consisting of honeycomb and resistive films was proposed and fabricated through 3D printing and silk-screen printing technology. According to simulation and experiment results, the present three-dimensional metamaterial absorber can realize an absorptivity of more than 90% in a wide band of 3.53–24.00 GHz, and improve absorbing efficiency for transverse magnetic (TM) waves of oblique incidence angle from 0° to 70°. The compression test results reveal that compressive strength of the 3D printed honeycomb can reach 10.7 MPa with density of only 254.91 kg/m3, and the energy absorption per volumeWvand per unit massWmare 4.37 × 103KJ/m3and 17.14 KJ/Kg, respectively. The peak compressive strength and energy absorption per mass are at least 2.2 and 3 times comparing to metallic lattice cores with the same density. Outstanding electromagnetic wave absorption and mechanical performance make the present three-dimensional metamaterial absorber more competitive in engineering applications.
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