Chaoqun Ge , Huaiyu Dong , Zonghan Li , Chen Yu , Zhichen Wang , Yingjian Sun , Yixing Huang , Tian Zhao , Ying Li , Liuying Wang
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Reflectivity tests at normal incidence reveal that MM (with a thickness of 8 mm) achieves an effective absorption bandwidth (EAB) of 33.4 GHz within the 2–40 GHz frequency range. Under transverse magnetic polarization and 60° oblique incidence conditions, MM demonstrates a coverage rate of 98.5 % for EAB. Furthermore, three-point bending tests demonstrate MM's excellent deformation capabilities (up to 50 mm) and mechanical load-bearing performance (bending strength reaching 78 MPa), laying the groundwork for its application on complex surfaces. Lastly, targeting the application of microwave absorption metamaterials on high-speed moving objects, comparative analysis of MM and five typical MAMs reveals that MM exhibits the lowest drag coefficient (<em>C</em><sub>d</sub> = 0.132). In summary, this study offers a straightforward and replicable method for designing, optimizing, fabricating, and evaluating MAMs, while suggesting aerodynamic performance as a novel metric for assessing their multifunctional capabilities.</p></div>","PeriodicalId":283,"journal":{"name":"Composites Science and Technology","volume":"257 ","pages":"Article 110846"},"PeriodicalIF":8.3000,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Bioinspired 3D printed metamaterial for wideband microwave absorption and aerodynamic efficiency\",\"authors\":\"Chaoqun Ge , Huaiyu Dong , Zonghan Li , Chen Yu , Zhichen Wang , Yingjian Sun , Yixing Huang , Tian Zhao , Ying Li , Liuying Wang\",\"doi\":\"10.1016/j.compscitech.2024.110846\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>To further decrease the mass and thickness of multifunctional wideband microwave absorption metamaterials (MAMs), this study applies photonic crystal principles to the field of microwave absorption. 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引用次数: 0
摘要
为了进一步降低多功能宽带微波吸收超材料(MAM)的质量和厚度,本研究将光子晶体原理应用于微波吸收领域。从 Morpho Menelaus 鳞片的结构着色调节中汲取灵感,设计出一种名为 MM 的新型集成生物启发超材料。MM 具有低阻力系数、疏水性、机械承载能力和宽带雷达隐身功能。利用 PA6@CF 长丝和材料挤出 3D 打印技术,通过粒子群优化(PSO)以低成本快速制造出机械测试试样和 MM 试样。正常入射下的反射率测试表明,MM(厚度为 8 毫米)在 2-40 GHz 频率范围内的有效吸收带宽(EAB)达到 33.4 GHz。在横向磁极化和 60° 斜入射条件下,MM 的 EAB 覆盖率达到 98.5%。此外,三点弯曲试验证明 MM 具有出色的变形能力(最大 50 毫米)和机械承重性能(弯曲强度达到 78 兆帕),为其在复杂表面上的应用奠定了基础。最后,针对微波吸收超材料在高速移动物体上的应用,对 MM 和五种典型 MAM 的对比分析表明,MM 的阻力系数最低(Cd = 0.132)。总之,本研究为设计、优化、制造和评估微波吸收超材料提供了一种直接且可复制的方法,同时建议将空气动力学性能作为评估其多功能性的新指标。
Bioinspired 3D printed metamaterial for wideband microwave absorption and aerodynamic efficiency
To further decrease the mass and thickness of multifunctional wideband microwave absorption metamaterials (MAMs), this study applies photonic crystal principles to the field of microwave absorption. Drawing inspiration from the structural coloration regulation of Morpho Menelaus scales, a novel integrated bioinspired MAM named MM is designed. MM possesses low drag coefficient, hydrophobicity, mechanical load-bearing capacity, and wideband radar stealth functionality. Utilizing PA6@CF filaments and material extrusion 3D printing technology, mechanical test specimens and MM specimens optimized through particle swarm optimization (PSO) are rapidly fabricated at low cost. Reflectivity tests at normal incidence reveal that MM (with a thickness of 8 mm) achieves an effective absorption bandwidth (EAB) of 33.4 GHz within the 2–40 GHz frequency range. Under transverse magnetic polarization and 60° oblique incidence conditions, MM demonstrates a coverage rate of 98.5 % for EAB. Furthermore, three-point bending tests demonstrate MM's excellent deformation capabilities (up to 50 mm) and mechanical load-bearing performance (bending strength reaching 78 MPa), laying the groundwork for its application on complex surfaces. Lastly, targeting the application of microwave absorption metamaterials on high-speed moving objects, comparative analysis of MM and five typical MAMs reveals that MM exhibits the lowest drag coefficient (Cd = 0.132). In summary, this study offers a straightforward and replicable method for designing, optimizing, fabricating, and evaluating MAMs, while suggesting aerodynamic performance as a novel metric for assessing their multifunctional capabilities.
期刊介绍:
Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites.
Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.