Honeycomb sandwich composite material with high-speed impact resistance and wave-absorbing stealth functions and preparation method of honeycomb sandwich composite material

Abstract

The invention relates to a honeycomb sandwich composite material with high-speed impact resistance and wave-absorbing stealth functions and a preparation method of the honeycomb sandwich composite material. The honeycomb sandwich composite material is formed by compounding a wave-transparent layer, a wave-absorbing layer and a reflecting layer in sequence, the wave-transparent layer is prepared from low-dielectric-constant continuous fiber cloth and low-dielectric-constant resin and can provide good impedance matching performance, so that incident electromagnetic waves can enter the material as much as possible; the middle wave-absorbing layer is a honeycomb filled with a mixture of pure shear thickening glue and wave-absorbing functional particles/shear thickening glue with a certain height ratio, and can endow the material with strong electromagnetic wave loss capability; and the bottom reflecting layer is made of a carbon fiber cloth reinforced resin matrix composite material, so that the electromagnetic waves which are not absorbed can be reflected and secondarily lost. According to the invention, the defects of difficulty in controlling the coating thickness, difficulty in ensuring the uniformity and the like in the process of coating the wave-absorbing agent on the honeycomb wall can be solved.

Description

technical field [0001] The invention relates to the technical field of preparation of functional honeycomb sandwich composite materials, in particular to a honeycomb sandwich composite material having both high-speed impact resistance and wave absorbing stealth functions and a preparation method thereof. Background technique [0002] With the continuous advancement of science and technology, more and more electronic devices use electromagnetic waves, which may generate electromagnetic interference and radiation, which not only interferes with the normal operation of electronic instruments, but also affects living organisms within the radiation range. cause harm. Therefore, the study of absorbing materials has received more and more extensive attention. [0003] Absorbers are mainly divided into two categories: coating type and structural type. Compared with coated absorbing materials, structural absorbing materials can achieve the dual functions of bearing and absorbing, a...

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Problems solved by technology

At present, there have been a lot of reports on the experimental research and theoretical calculation of the absorbing performance of the honeycomb sandwich composite materials, but the absorbing honeycomb sandwich composite materials they involve are obtained by coating the absorbing material on the inner wall of the honeycomb. Although they all show excellent absorbing performance, the process of coating the honeycomb wall with absorbing agent is not easy to control the thickness of the coating and it is difficult to ensure uniformity. In order to obtain the ideal absorption bandwidth, the thickness of the honeycomb is still very large, and at the same time The impact resistance of this coated wave-absorbing honeycomb sandwich composite is also very limited

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