Optimal Design of Multi-Layer Absorbent Honeycomb Cellular Composite Material Structure

Abstract:

Next generation aircraft rely heavily on lightweight honeycomb composite structures for improved electromagnetic wave scattering and stealth capabilities. This paper investigated the optimal design and analysis methods of multi-layer absorbent honeycomb composite structures. The effective electromagnetic parameters of anisotropic object were calculated accompany with the formulation of reflectivity for incident wave. A genetic algorithm is employed to optimize the RCS of the absorptive honeycomb composite in desired angle range. The thickness and the volume fraction of absorptive materials are adopted to optimize the effective electromagnetic parameters under different polarized modes. Single and multi layer absorptive honeycomb composite were been studied. The results show that the thickness of the first absorptive layer plays a key role on the reflectivity of honeycomb structure. Therefore, it is advised to arrange the absorptive layers such that the EM absorption properties increases from outside to inside.

• Periodical: Key Engineering Materials (Volume 723)
• Pages: 335-343
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.723.335
• Online since: December 2016
• Authors: Xiao Hu Zhang*, Qin Sun, Shao Feng Xu
• Keywords: Absorbent Materials, Honeycomb Composite Material Structure, Optimal Design, RCS

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