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Double-layer skin wave-absorbing honeycomb sandwich structure and preparation method thereof

A technology of honeycomb sandwich and skin, which is applied in chemical instruments and methods, laminated, layered products, etc., and can solve problems such as difficulty in obtaining wave-absorbing effects

Inactive Publication Date: 2020-05-22
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Part of the equipment has high requirements on the mechanical properties of the skin, and it is inevitable to use a thicker skin. However, when the skin of the sandwich structure is thicker (greater than 0.2mm), no matter how the absorbing structure of the composite material is adjusted, the It is difficult to obtain satisfactory absorbing effect in the high frequency (Ka) band

Method used

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  • Double-layer skin wave-absorbing honeycomb sandwich structure and preparation method thereof
  • Double-layer skin wave-absorbing honeycomb sandwich structure and preparation method thereof
  • Double-layer skin wave-absorbing honeycomb sandwich structure and preparation method thereof

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preparation example Construction

[0048] According to another aspect of an embodiment of the present invention, a method for preparing a double-skinned wave-absorbing honeycomb sandwich structure is provided, including the following steps:

[0049] Step 1, laying layers on the mold in the order of the first skin layer, wave-transmitting layer, second skin layer, several wave-absorbing layers and reflective layers, and connecting each layer with an adhesive;

[0050] In this step, the first skin layer, the wave-transmitting layer, the second skin layer, several layers of wave-absorbing layers, and the reflective layer materials need to be cut to the required size before laying the layers. In addition, a mold release agent needs to be sprayed on the surface of the mold , and dry, when laying layers, each layer needs to be aligned;

[0051] Step 2, curing the multi-layer material prepared in step 1 to obtain a double-skinned wave-absorbing honeycomb sandwich structure blank.

[0052] In this step, as required, t...

Embodiment 1

[0060] In the double-skinned wave-absorbing honeycomb sandwich structure provided in this embodiment, the materials used in the first skin layer and the second skin layer are both glass fiber fabric reinforced resin composite materials with a thickness of 1 mm; the materials used in the wave-transmissive layer are It is an aramid paper honeycomb with a thickness of 0.5mm; the wave-absorbing layer has 4 layers in total. The mass fractions of carbon black in the four absorbing layers in the direction are 0.1%, 0.5%, 2%, and 4% respectively; the material used for the reflective layer is carbon fiber fabric reinforced resin composite material.

[0061] The preparation method of the present embodiment comprises the following steps:

[0062] 1. Cut glass fiber fabric reinforced resin prepreg, aramid paper honeycomb, wave absorbing honeycomb, carbon fiber fabric reinforced resin composite materials to the required size;

[0063] 2. Spray the release agent on the surface of the mold ...

Embodiment 2

[0077] In the double-skinned wave-absorbing honeycomb sandwich structure provided in this embodiment, the materials used in the first skin layer and the second skin layer are both quartz fiber fabric reinforced resin composite materials with a thickness of 0.6 mm; The material is epoxy honeycomb with a thickness of 1.1mm; the wave-absorbing layer has 4 layers in total. direction, the mass fractions of carbon black in the four absorbing layers are 0.1%, 0.5%, 2%, and 4% respectively; the reflective layer is made of carbon fiber fabric reinforced resin composite.

[0078]The preparation method of the present embodiment comprises the following steps:

[0079] 1. Cut quartz fiber fabric-reinforced resin prepreg, aramid paper honeycomb, wave-absorbing honeycomb, and carbon fiber fabric-reinforced resin composite materials to the required size;

[0080] 2. Spray the release agent on the surface of the mold and let it dry;

[0081] 3. Lay quartz fiber fabric reinforced resin prepre...

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Abstract

The invention provides a double-layer skin wave-absorbing honeycomb sandwich structure and a preparation method thereof. The structure is formed by overlapping a first skin layer, a wave-transmittinglayer, a second skin layer, a plurality of wave-absorbing layers and a reflecting layer in sequence in the electromagnetic wave propagation direction, wherein the thickness of the first skin layer andthe thickness of the second skin layer are 0.2 mm-1mm respectively, the wave-transmitting layer is a honeycomb structure layer, the thickness of the wave-transmitting layer is 0.5 mm-1.5mm, and any one of the wave-absorbing layers is a wave-absorbing honeycomb layer. Through the double-layer skin design, the wave-absorbing performance of the wave-absorbing honeycomb sandwich structure in the high-frequency (Ka) waveband can be greatly improved, and the defect that when the skin is thick (larger than 0.2 mm), the wave-absorbing honeycomb sandwich structure is difficult to obtain a satisfactorywave-absorbing effect in the high-frequency (Ka) waveband is overcome.

Description

technical field [0001] The invention relates to a double-skin wave-absorbing honeycomb sandwich structure and a preparation method thereof, belonging to the technical field of functional materials. Background technique [0002] With the development of radar detection and guidance technology, the main detection bands of enemy radars continue to expand to high-frequency bands, and weapons and equipment have an urgent need for materials with high-frequency (Ka) band electromagnetic wave absorption functions. [0003] The lightweight absorbing honeycomb sandwich structure has a wide range of application backgrounds in weapons and equipment, and has excellent broadband absorbing performance. Part of the equipment has high requirements on the mechanical properties of the skin, and it is inevitable to use a thicker skin. However, when the skin of the sandwich structure is thicker (greater than 0.2mm), no matter how the absorbing structure of the composite material is adjusted, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B29/00B32B3/12B32B7/12B32B27/04B32B27/10B32B33/00B32B27/38B32B27/28B32B27/06H05K9/00B29C65/52
CPCB29C65/52B29L2009/00B29L2031/608B32B3/12B32B7/12B32B27/08B32B27/10B32B27/281B32B27/38B32B29/005B32B33/00B32B2038/0076B32B2260/028B32B2260/04B32B2260/046B32B2262/0269B32B2262/10B32B2262/101B32B2262/106B32B2307/212H05K9/0088
Inventor 邢孟达宫元勋马向雨吕通周勇卢明明刘甲刘绍堂朱伟杰闫丽生
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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