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Wave-transmitting composite material half cover and preparation method thereof

A technology of composite materials and resin composite materials, which is applied in the field of wave-transparent composite material half-covers and its preparation, can solve problems such as heavy weight, stress concentration, and inconsistent thermal expansion coefficients of metal and material shells, and achieve excellent mechanical properties and overcome heavy weight effect

Active Publication Date: 2019-12-20
长春长光宇航复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, the existing wave-transparent material structures are mostly composed of metal skeletons and material shells after assembly, which has the disadvantages of heavy weight, inconsistent thermal expansion coefficients of metal and material shells, and stress concentration.

Method used

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  • Wave-transmitting composite material half cover and preparation method thereof
  • Wave-transmitting composite material half cover and preparation method thereof
  • Wave-transmitting composite material half cover and preparation method thereof

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preparation example Construction

[0039] The present invention also provides a method for preparing the wave-transparent composite material half cover, comprising the following steps:

[0040] Step 1: Lay 3 to 5 groups of prepregs of fiber and resin composite materials on the split mold of the metal male mold, assemble the split molds into one body, and precompact the prepregs to form prepreg ring ribs and Longitudinal structure;

[0041] Wherein, in the fiber and resin composite material, the volume fraction of the fiber is 57% to 63%, each group of fiber and resin composite material is laid by 4 layers of fiber and resin composite material, and the laying angle is 0 °, 90°, +θ°, -θ°, 30°≤θ≤60°, the laying thickness is 0.2mm, the laying cycle of the longitudinal ring reinforcement is generally 3-5 groups, and the number of cycles is generally based on the mechanical load of the product strength formulation;

[0042]The fiber is one of glass fiber, quartz fiber and high silica fiber, and the resin is one of ...

Embodiment 1

[0047] This embodiment provides a method for preparing a wave-transparent composite material half cover, including:

[0048] S1. Repeat laying 5 times according to the laying angle of 0°, 90°, +45°, -45° [0 / 90 / +45 / -45] 5 Lay-up sequence, lay glass fiber / cyanate resin prepreg on the metal male mold split mold, the thickness of each layer of prepreg is 0.2mm, then assemble the split mold into one, screw the split mold The connecting bolts between them pre-compact the prepreg to form a prepreg longitudinal ring reinforcement structure. In the glass fiber and cyanate ester composite material, the volume fraction of the glass fiber is 57%.

[0049] S2. According to the laying angle, it is 0°, 90°, +45°, -45°, repeat laying 6 times [0° / 90° / +45° / -45°] 6 Lay-up sequence, laying front and rear end frame reinforcement areas and flanges.

[0050] S3. According to the laying angles, they are 0°, 90°, +45°, -45°, repeat laying 8 times [0° / 90° / +45° / -45°] 8 The ply sequence of , lay down ...

Embodiment 2

[0054] This embodiment provides a method for preparing a wave-transparent composite material half cover, including:

[0055] S1. Repeat laying 4 times according to the laying angle of 0°, 90°, +30°, -30° [0 / 90 / +30 / -30 / ] 4 Layup sequence, lay quartz fiber / cyanate resin prepreg on the metal male mold split mold, the thickness of each layer of prepreg is 0.2mm, then assemble the split mold into one, and tighten the split mold The connecting bolts between them pre-compact the prepreg to form a prepreg longitudinal ring reinforcement structure. In the composite material of quartz fiber and cyanate ester, the volume fraction of the quartz fiber is 60%.

[0056] S2. According to the laying angles, they are 0°, 90°, +30°, -30°, repeat laying 6 times [0° / 90° / +30° / -30°] 6 Lay-up sequence, laying front and rear end frame reinforcement areas and flanges.

[0057] S3. According to the laying angles, they are 0°, 90°, +30°, -30°, repeat laying 8 times [0° / 90° / +30° / -30°] 8 The ply sequen...

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Abstract

The invention discloses a wave-transmitting composite material half cover. The half cover comprises a shell skin, annular ribs, longitudinal ribs, a front end flange reinforcing area and a rear end flange reinforcing area; the shell skin is of a hollow truncated cone structure; the annular ribs are circumferentially arranged on the inner wall of the shell skin and are axially arrayed along the shell skin; the longitudinal ribs are arranged on the inner wall of the shell skin along the axial direction of the shell skin and are arrayed along the circumferential direction of the shell skin; the front end flange reinforcing area is annular and is coaxially arranged at one side with a smaller radius of the shell skin; the rear end flange reinforcing area is annular and is coaxially arranged atone side with a larger radius of the shell skin; and the shell skin, the annular ribs, the longitudinal ribs, the front end flange reinforcing region and the rear end flange reinforcing region are allformed by laying a plurality of layers of fiber and resin composite material, wherein the volume fraction of fibers in the fiber and resin composite material is 57-63%. A plurality of groups of the annular ribs and a plurality of groups of the longitudinal ribs are respectively arranged on the circumferential direction and the axial direction of the inner wall of the half cover, so that the halfcover has excellent mechanical properties. The invention also discloses a preparation method of the wave-transmitting composite material half cover.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, and more specifically, the invention relates to a wave-transparent composite material half cover and a preparation method thereof. Background technique [0002] In order to achieve the new generation of weapons and equipment with lightweight, high structural load-bearing performance, strong electronic countermeasures and other excellent comprehensive performance, high-tech fields such as aerospace have put forward higher and higher requirements for the performance of wave-transparent materials. Wave-transparent materials must not only meet the wave-transmission performance requirements of radar antennas with increasing power, but also have the characteristics of drag reduction and rectification and high-strength loads. [0003] At the same time, the existing wave-transparent material structures are mostly composed of metal skeletons and material shells after assembly, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08L63/00C08L61/34C08K7/14C08K7/10C08J5/24B29C70/34
CPCC08J5/24B29C70/34C08J2379/04C08J2363/00C08J2361/34C08K7/14C08K7/10
Inventor 刘永琪王宏禹王海芳商伟辉王利彬林再文
Owner 长春长光宇航复合材料有限公司
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