编织增强型复合材料等效电磁参数计算与优化

Calculation of effective electromagnetic parameters and optimization design of braided reinforced composite materials

摘要:

编织增强型复合材料相比传统颗粒填充型复合材料在电磁防护领域具有更大优势，然而其等效电磁参数计算与优化设计方法目前尚未明确。以正交编织型复合材料为研究对象，将复合材料等效成多层单纱定向周期排列的各向异性介质叠加，进而利用有效介质理论给出了各层介质等效电磁参数计算公式，并针对磁屏蔽复合材料进行了优化设计。结果表明：基体材料和纤维丝束的磁导率越高，复合材料的等效磁导率越高；纤维丝束直径越大，孔洞尺寸越小，复合材料的等效磁导率越大；纤维含量越高，复合材料磁导率越高。

Abstract:

The braided reinforced composite materials show many advantages in electromagnetic protection fields than traditional particle filled composites，while the effective electromagnetic parameters calculation and optimization design of braided reinforced composite materials are not clear at present. The orthogonal braided reinforced composite is taken as the research object, the composite is subdivided into multilayer anisotropic media with single yarn arrayed periodically, and the formulas of effective electromagnetic parameters of each layer are given using effective medium theory. The magnetic shielding composite is chosen to be optimized and the results indicate that the effective permeability of composites increases with the rise of the diameter，the content of fiber yarn, and the permeability of matrix and fiber, but with the decrease of the gap of the fabric.