Article ID: 2024ECP5072
Fiber reinforced materials are widely used in many products because of their excellent mechanical and chemical properties. The fiber types include rebar, wire, polypropylene fiber and carbon fiber, etc., and the fiber diameter ranges from millimeter to micrometer level. However, fiber reinforced materials are followed by a large number of electromagnetic shielding problems, especially for products in aerospace and other fields. And the reflection characteristics greatly affect the shielding performance of the material. Therefore, it is very important to evaluate the reflection characteristic of products by electromagnetic simulation. Due to the complex microstructure of fiber reinforced materials, direct modeling is very difficult and computationally expensive. Based on the existing multi-layer equivalent modeling method, this paper optimizes the layered method, and proposes an equivalent layer model modeling method when the number of layers is small. The idea of this method is to minimize the difference between the equivalent model and the actual structure through non-uniform thickness stratification, so as to improve the equivalent accuracy under the condition of the same number of segmentation layers. Finally, a series of simulations based on selected structural parameters and frequency range are carried out to compare the simulation results of the proposed method with those of the existing methods, and the results prove the effectiveness of the proposed method. Moreover, the conclusion obtained by this method is still valid when the structure size parameters, wavelength and electrical conductivity are proportionally changed according to the theory of electromagnetic wave propagation.
