A model for predicting electromagnetic wave absorption of 3D bidirectional angle-interlock woven fabric

Abstract

3D woven fabrics (3DWF) have great potential in the field of electromagnetic (EM) wave absorption with the abilities of great mechanical properties, flexible properties and structural stability. Taking 3D bidirectional angle-interlock woven fabric (3DBWF) as an example, through analyzing the representative volume unit of this fabric, the equivalent electromagnetic parameters of 3DBWF were calculated based on the strong fluctuation theory, and established an EM absorption model based on the transmission line theory. The validity of the model was verified by finite element software results and experimental results, which six kinds of 3DBWF samples were woven by carbon fibers. The results show that the higher the degree of buckling, the better the EM absorption. The EM absorption also depends on the shape of yarn cross section, fabric thickness and fiber volume fraction. This model provides theoretical guidance for the development of 3DWF in the field of wave absorption.

Keywords

• 3D woven fabrics
• Representative volume unit
• Electromagnetic wave absorption
• Carbon fibers