Alveolus type interlayer structure of the composite material

A composite material and sandwich structure technology, which is applied in the direction of building components, layered products, building structures, etc., can solve the problems of weak bonding performance, easy water ingress of honeycomb core material, low performance of sandwich structure anti-stripping, anti-fatigue, etc. problem, to achieve the effect of improving the overall mechanical performance and enhancing the anti-peeling ability

Inactive Publication Date: 2007-09-26
NANJING TECH UNIV
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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 sandwich structure of composite materials, 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, which leads to poor peeling resistance and fatigue resistance of the sandwich structure. In addition, if the panel is damaged, the honeycomb core material is easy to enter water and is not easy to discharge, which will lead to serious consequences such as degumming and peeling of the panel
In the sandwich structure with foam and balsa as the core material, the interface structure between the core material and the panel is simple, and the core material and the panel are easy to peel off during use, so that the sandwich structure cannot be widely used

Method used

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  • Alveolus type interlayer structure of the composite material
  • Alveolus type interlayer structure of the composite material
  • Alveolus type interlayer structure of the composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0030] As shown in Figures 1, 2, and 3, the alveolar composite material sandwich structure of the present invention includes a core material 1 of polyvinyl chloride foam material, and has pointed grooves arranged orthogonally on the upper and lower surfaces of the core material 1. 3. The groove 3 is filled with epoxy resin, and two layers of biaxial carbon fiber cloth are laid on the upper and lower surfaces of the core material 1 to form a carbon fiber panel 2 with the epoxy resin.

Embodiment 2

[0032] The alveolar composite material sandwich structure of the present invention, it comprises the core material 1 of polyurethane foam material, has the transverse rectangular groove 3 parallel to each other and the longitudinal rectangular groove 3 parallel to each other on the upper and lower surface of core material 1, but horizontal The rectangular groove 3 and the longitudinal rectangular groove 3 intersect each other at an acute angle. The groove 3 is filled with vinyl resin, and three layers of four-axis glass fiber cloth are laid on the upper surface of the core material 1. Aramid fiber cloth layer, the fiber cloth layer is cured with vinyl resin to form the panel 2 .

[0033] As described in Embodiment 1, when the grooves 3 are formed, the number and arrangement of the grooves 3 can be flexibly controlled according to the force requirements.

Embodiment 3

[0035] Alveolar type composite material sandwich structure of the present invention, it comprises the core material 1 of paulownia wood material, on the upper and lower surface of core material 1, open the triangular groove 3 of orthogonal opening, be filled with phenolic resin in the groove 3, in core material The upper and lower surfaces of 1 are laid with aluminum panels 2 .

[0036] As described in Embodiments 1 and 2, the thickness of the panels 2 arranged on the upper and lower surfaces of the core material 1 may be the same or may not be the same.

[0037] The preparation method of the above-mentioned alveolar composite sandwich structure is as follows:

[0038] a. On the upper and lower surfaces of the core material 1 of foam (including: polyurethane, polyvinyl chloride, carbon foam, etc.) and balsa wood (including: Balsa wood, paulownia wood, fir, oak, plywood, etc.) (The shape of the groove can include: pointed, rectangular, open triangle, etc.);

[0039] b. The co...

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PUM

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Abstract

The invention relates to a cogging composite sandwich structure comprising core material (1) and face plate (2), characterized in that net concave grooves (3) are set at top and bottom faces of core material (1) and face plates (2) are put on top and bottom faces of core material (1) by resin. Compared with other products, the biggest characteristic is that concave grooves filled with resin fully can enhance the anti-stripping ability of face plates and core material obviously and it makes the whole forced performance and the usage effect of composite sandwich structure be improved obviously. It is applied in aerospace, ship and vehicle so on universally and it is also applied in building fields such as roof board, building template and wall material so on.

Description

technical field [0001] The invention relates to composite material sandwich structure beams, plates, and shell structural parts, in particular to an alveolar composite material sandwich structure, which is widely used in the fields of vehicles, buildings, etc., such as roof panels, building templates, wall materials, Vehicle partitions, floors, etc. Background technique [0002] Composite material sandwich structure beams, plates, shells and other structural parts are composed of three parts, the outermost layer is the panel, which mainly bears the normal stress caused by bending deformation, and is made of high-strength, high-modulus materials, such as laminated carbon fiber and glass fiber Cloth or metal panels, etc.; the middle is the core material, which provides sufficient section moment of inertia for the sandwich structure and mainly bears shear stress. Materials such as honeycomb, foam, and balsa wood are commonly used. There is an adhesive layer between the panel a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/00E04C2/00E04B2/72
Inventor 刘伟庆方海万里
Owner NANJING TECH UNIV
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