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Wave-absorbing composite aircraft component and preparation method therefor

A technology of aircraft parts and composite materials, which is applied in the field of wave-absorbing composite aircraft wing parts and its preparation, can solve problems such as limited application occasions, poor compatibility of electrical properties and load-bearing properties, and difficulty in improving structural electrical properties.

Active Publication Date: 2019-12-20
BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing stealth composite materials are generally designed according to equal-thickness specifications. Correspondingly, in the structure, the conventional stealth functional material layer is applied in an equal-thickness lay-up method. The difference in the contribution of electromagnetic scattering at different positions on the structural components is not considered. The average thickness When the thickness is insufficient, the electrical properties of the structure are difficult to improve, and when the average thickness increases, the space of the structural load-bearing material is too much occupied.
[0006] It can be seen that the existing wave-absorbing structural components have the disadvantages of limited application occasions, poor compatibility of electrical performance and load-bearing performance

Method used

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  • Wave-absorbing composite aircraft component and preparation method therefor
  • Wave-absorbing composite aircraft component and preparation method therefor

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preparation example Construction

[0051] For the above-mentioned flight device, an embodiment of the present invention proposes a method for preparing the above-mentioned aircraft component, the method includes the following steps:

[0052] (1) Material preparation:

[0053] a. Material preparation for electric loss absorbing layer: Disperse the commercially available conductive carbon black material in the high molecular polymer, the mass ratio of carbon black to high molecular polymer is between 0.5:100 and 1:10, fully stir, and configure into carbon black paint; use a spray gun to evenly spray carbon black paint on the surface of the wave-transmitting fiber cloth with a thickness of 0.1 mm to 0.2 mm, and control the number of spraying times to make the deposition thickness of carbon black paint on the fiber cloth meet the design requirements; After the cloth is dried and cured, the electric loss absorbing cloth is obtained; the above steps are repeated to prepare electric loss absorbing cloth with different...

Embodiment 1

[0072] Example 1: 0.2mm wave-transmitting layer + 0.2mm magnetic loss wave-absorbing layer + 0.1mm shielding bottom layer

[0073] (1) Material preparation:

[0074] a. Material preparation for magnetic loss absorbing layer: Disperse commercially available magnetic radar wave absorbing material in a high molecular polymer, the mass percentage of the absorbent is 89%, and the mass percentage of the high molecular polymer is 11%. , fully stirred, and configured as an absorbent coating; use a spray gun to spray the absorbent coating on the surface of the wave-transmitting fiber cloth with a thickness of 0.2mm, and control the number of spraying times to make the deposition thickness of the carbon black coating on the fiber cloth meet the design requirements; for the above The fiber cloth is dried and solidified to obtain a magnetic loss wave-absorbing cloth. Apply adhesive to the surface of the magnetic loss wave-absorbing cloth, cut it into a suitable shape, and set it aside. ...

Embodiment 2

[0089] Example 2: 10mm wave-transmitting layer + 4mm electric loss absorbing layer + 5mm magnetic loss absorbing layer + 1mm electric loss absorbing layer + 15mm magnetic loss absorbing layer + 20mm shielding bottom layer

[0090] (1) Material preparation:

[0091] a. Material preparation for electric loss absorbing layer: disperse commercially available conductive carbon black material in high molecular polymer, the mass ratio of carbon black to high molecular polymer is 0.5:100, fully stir, and configure carbon black coating; The spray gun evenly sprays the carbon black paint on the surface of the wave-transmitting fiber cloth with a thickness of 0.2 mm, and controls the spraying times to make the deposition thickness of the carbon black paint on the fiber cloth meet the design requirements; after drying and curing the above fiber cloth, the electrical loss Absorbing cloth: Repeat the above steps to prepare electric loss absorbing cloth with mass ratios of carbon black to po...

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Abstract

The invention belongs to the field of radar stealth of aircrafts and particularly relates to a wave-absorbing composite aircraft aerofoil component and a preparation method therefor. The component iscomposed of an upper wave absorbing member, a lower wave absorbing member and a force bearing part, wherein a docking interface of the upper and lower wave absorbing members about is of a horizontal surface. The upper wave absorbing member, the lower wave absorbing member and the force bearing part are fixed together. Each of the upper wave absorbing member and the lower wave absorbing member is of a three-layer structure, an outer layer is made from a wave-transmitting fiber-reinforced composite material, an inner layer is a shielding bottom layer, and a wave absorbing layer is filled betweenthe outer layer and the inner layer. An edge part of an aircraft is subjected to local thickening treatment, internal spaces of edge parts of structural members are fully utilized, the compatibilitybetween electrical properties and mechanical properties is achieved, and requirements on process feasibility are met.

Description

technical field [0001] The invention belongs to the field of aircraft radar stealth, and in particular relates to a wave-absorbing composite material aircraft wing surface component and a preparation method thereof. Background technique [0002] Radar is the main detection threat faced by military aircraft. The common technical measures used by various types of aircraft to reduce the radar cross section (RCS) in this range are the application of stealth materials and stealth shapes. [0003] For various types of military aircraft components, since the enemy's radar waves are generally incident along a small angle near the horizontal azimuth, the detection threat azimuth is mainly the horizontal azimuth, and the aircraft needs to meet the aerodynamic shape constraints. (Fuselage) and other components have different specular scattering points and specular scattering parts in the horizontal direction, which are the main electromagnetic scattering parts. [0004] Continuous fib...

Claims

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Application Information

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IPC IPC(8): B32B9/00B32B9/04B32B17/02B32B17/06B32B5/02B32B5/26B32B27/32B32B27/02B32B27/12B32B27/34B32B7/12B32B37/12B32B37/10B32B38/00B32B38/16B64C3/00
CPCB32B5/02B32B5/26B32B7/12B32B37/1284B32B37/10B32B38/00B32B38/164B32B38/0004B64C3/00B32B2038/0076B32B2255/02B32B2255/26B32B2262/0253B32B2262/0269B32B2262/106B32B2262/101B32B2262/10
Inventor 张松靖戴全辉王瑞郝璐于扬黄兴军
Owner BEIJING RES INST OF MECHANICAL & ELECTRICAL TECH
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