Purpose

The purpose of this paper is to investigate cotton fabric behavior that is exposed to radar waves between selected operation frequencies as an alternative radar-absorbing material (RAM) response. Cotton fabric biocomposite materials were compared with carbon fabric composite materials, which are good absorbers, in terms of mechanical and electromagnetic (EM) properties for that purpose.

Design/methodology/approach

The laminated composite plates were manufactured by using a vacuum infusion process. The EM tests were experimentally performed with a vector network analyzer to measure reflection, transmission and absorption ability of cotton fabric, carbon fabric and cotton–carbon fabric (side by side) composite plates between 3 and 18 GHz. The tensile and low-velocity impact tests were carried out to compare the mechanical properties of cotton fabric and carbon fabric composite plates. A scanning electron microscope was used for viewing the topographical features of fracture surfaces.

Findings

The cotton fabric composite plate exhibits low mechanical values, but it gives higher EM wave absorption values than the carbon fabric composite plate in certain frequency ranges. Comparing the EM absorption properties of the combination of cotton and carbon composites with those of the carbon composite alone, it appears that the cotton–carbon combination can be considered as a better absorber than the carbon composite in a frequency range from 12 to 18 GHz at Ku band.

Originality/value

This paper shows how cotton, which is a natural and easily supplied low-cost raw material, can be evaluated as a RAM.

中文翻译：

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棉织物复合材料作为天然雷达吸收材料的研究

目的

本文的目的是研究棉织物的行为，该行为在选定的工作频率之间暴露于雷达波下，作为一种替代性的雷达吸收材料（RAM）响应。就此而言，将棉织物生物复合材料与碳纤维织物复合材料进行了比较，碳纤维织物复合材料是良好的吸收剂，在机械和电磁（EM）性能方面。

设计/方法/方法

层压复合板通过真空灌注工艺制造。EM测试是通过矢量网络分析仪进行实验的，以测量3 GHz至18 GHz之间的棉织物，碳纤维织物和棉-碳纤维织物（并排）复合板的反射，透射和吸收能力。进行了拉伸和低速冲击试验，以比较棉织物和碳纤维复合材料板的机械性能。使用扫描电子显微镜观察断裂表面的形貌特征。

发现

棉织物复合板具有较低的机械值，但在某些频率范围内比碳纤维复合板具有更高的EM波吸收值。将棉和碳复合材料组合的电磁吸收性能与单独的碳复合材料的电磁吸收性能进行比较，似乎可以认为在12至18 GHz的频率范围内，棉-碳组合比碳复合材料吸收性能更好。 band乐队。

创意/价值

本文说明了如何将天然棉（一种容易获得的低成本原材料）评估为RAM。