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Grid structural reinforced composite material sandwich structure

A composite material and sandwich structure technology, applied in building materials, truss structures, joists, etc., can solve the problems of low compression and shear resistance, weak bonding performance, and cannot be widely used, so as to improve the compression resistance and shear resistance, enhance the overall mechanical performance, and enhance the effect of anti-stripping ability

Inactive Publication Date: 2007-11-07
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In my country, honeycomb is mostly used as the core material in the composite sandwich structure, but the contact area between the face plate and the core material of the honeycomb sandwich structure is small, so its bonding performance is relatively weak.
In addition, our country also has a composite material sandwich structure with polyurethane foam as the core material, but due to the low compression and shear resistance of the foam, it cannot make full use of the tensile capacity of the fiber panel, so that the sandwich structure cannot be used. be widely used

Method used

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  • Grid structural reinforced composite material sandwich structure
  • Grid structural reinforced composite material sandwich structure
  • Grid structural reinforced composite material sandwich structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The lattice-reinforced composite material sandwich structure of the present invention comprises a core material 1 made of polyvinyl chloride foam, which is cut along the thickness direction of the core material 1, and the cut position is two-way orthogonal and vertically arranged, wherein it is filled with The resin web 3 is formed after the epoxy resin, and two layers of biaxial carbon fiber cloth are laid on the upper and lower surfaces of the core material 1, and the fiber panel 2 can be formed by curing with the epoxy resin.

Embodiment 2

[0034] The lattice-reinforced composite material sandwich structure of the present invention comprises a core material 1 made of paulownia wood, which is cut along the thickness direction of the core material 1, and the cutting position is two-way orthogonal and obliquely arranged, and is filled with glass fiber cloth , it is cured with vinyl resin to form a resin web 4, three layers of four-axis glass fiber cloth layers are laid on the upper surface of the core material 1, and three layers of four-axis aramid fiber cloth layers are laid on the lower surface of the core material 1, They are cured with vinyl resin to form the fiber panel 2 .

[0035] As described in Embodiment 1, when the core material 1 is cut, the number, size and arrangement of the cut positions can be flexibly controlled according to the force requirements.

Embodiment 3

[0037] The lattice-reinforced composite material sandwich structure of the present invention comprises a core material 1 made of polyurethane foam, cut along the thickness direction of the core material 1, and the cut position is unidirectional and obliquely arranged, and filled with carbon fiber cloth. After the phenolic resin is cured, the resin web 4 is formed. Three layers of four-axial glass fiber cloth are laid on the upper surface of the core material 1, and five layers of four-axial glass fiber cloth are laid on the lower surface. They are cured with the phenolic resin to form a composite material. Web 4.

[0038] As described in Embodiments 1 and 2, the thickness of the fiber panels 2 arranged on the upper and lower surfaces of the core material 1 may be consistent or not.

[0039] The preparation method of the above-mentioned lattice-reinforced composite sandwich structure is as follows:

[0040] a. Cut in the thickness direction of the core material 1 of foam (incl...

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Abstract

The composite material reinforced sandwich structure includes core material and fibrous face plates, and features the core material of resin or composite material comprising resin and fiber fabric, and the face plates formed with fiber fabric and resin. Compared with available similar product, the present invention has higher compression strength and shearing strength, reinforced stripping resistance and higher integral mechanical performance. The present invention is used as structural member bearing great load, such as deck plate, container bottom plate, bridge plate, etc.

Description

technical field [0001] The invention relates to a lattice-reinforced composite material sandwich structure beam, plate, and shell structure, which is widely used in aerospace, ship vehicles, bridge construction and other fields with large loads, such as: ship panels, containers Base plate, airport backing plate, bridge deck, etc. Background technique [0002] The sandwich structure of composite materials consists of three parts. The outermost layer is the panel, which mainly bears the normal stress caused by bending deformation. It is made of high-strength and high-modulus materials, such as laminated carbon fiber or glass fiber cloth; the middle is the core material. Provide enough section moment of inertia for the sandwich structure, mainly bear the shear stress, commonly used honeycomb, foam, balsa and other materials. There is an adhesive layer between the panel and the core material, and the two are bonded together by resin, such as unsaturated polyester, vinyl resin, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C1/40E04C3/02
Inventor 刘伟庆方海万里
Owner NANJING UNIV OF TECH
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