Fiber-reinforced foam sandwich structure radome and making method

A technology of radome and sandwich structure, applied in the field of radome, can solve the problems of impact resistance, bending resistance, buckling resistance, and poor delamination resistance performance, so as to improve shear strength, impact resistance, and flat pressure. Effects of Strength and Modulus

Inactive Publication Date: 2019-03-19
THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] Technical problem solved by the present invention: provide a fiber-reinforced foam sandwich structure radome and its manufacturing method to solve the problems of traditional radome with poor impact resistance, bending resistance, buckling resistance and delamination resistance

Method used

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  • Fiber-reinforced foam sandwich structure radome and making method
  • Fiber-reinforced foam sandwich structure radome and making method

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the present invention will be further introduced, as figure 1 and figure 2 As shown, a fiber-reinforced foam sandwich structure radome comprises an upper skin 1, a lower skin 3 and a foam interlayer 2, and the upper skin 1 and the lower skin 3 are laid on the upper and lower surfaces of the foam interlayer 2 respectively, There are several Kevlar fiber sutures 4 sewn along the thickness direction inside the foam interlayer 2 .

[0021] The sewing line spacing a of the Kevlar fiber suture 4 is 2 mm, the sewing needle pitch b is 20 mm, the sewing length of the Kevlar fiber suture 4 on the surface of the upper skin 1 and the lower skin 3 is 20 mm, and the sewing line spacing a is The length design of , sewing needle distance b, and suture length c can not only effectively transmit the load in the foam interlayer 2 , but also meet the wave transmission requirement of the foam interlayer 2 .

[0022] The Kevlar fiber suture ...

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Abstract

The invention discloses a fiber-reinforced foam sandwich structure radome, which comprises an upper skin, a lower skin and a foam sandwich. The upper skin and the lower skin are respectively pasted onthe upper and lower surfaces of the foam sandwich. The foam sandwich is internally provided with a plurality of Kevlar fiber stitching lines performing stitching along the thickness direction, the Kevlar fiber stitching lines can effectively improve the flat compression strength and the modulus of the radome, the radome interlayer shear strength is improved, and the impact resistance, the bendingresistance, the buckling resistance and the delamination damage resistance of the radome are greatly improved.

Description

technical field [0001] The invention relates to the technical field of radome, in particular to a fiber-reinforced foam sandwich structure radome and a manufacturing method. Background technique [0002] The foam sandwich structure has been widely used in the aerospace field due to its advantages of high specific stiffness and specific strength, light weight, good stability, and fatigue resistance. In addition, the isotropic properties of the foam sandwich make it have good wave transmission performance. Therefore, the foam sandwich structure can be used not only as a structural part, but also as a functional part. At present, the foam sandwich structure has been widely used in the field of radome. [0003] The impact resistance of the foam sandwich structure is weak, and it is prone to damage after being subjected to accidental impacts such as hail impact, bird strike, and sandstone impact. In particular, the strength and modulus of the foam interlayer are lower than that o...

Claims

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Application Information

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IPC IPC(8): H01Q1/42
CPCH01Q1/42
Inventor 周春苹曲秀晓张东亮
Owner THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
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