Suture technique enhanced foam sandwich hat stiffened wall panel structure and forming method thereof

A technology for reinforcing foam and reinforced wall panels is applied in the field of fiber composite material reinforcement, which can solve the problems of easy debonding of foam sandwiches, and achieve the effects of simple manufacturing process, strong bearing capacity, and low manufacturing and maintenance costs.

Active Publication Date: 2015-04-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the foam-reinforced hat-shaped reinforced wall panel and the foam sandwich are easy to debond, and propose a hat-shaped reinfor

Method used

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  • Suture technique enhanced foam sandwich hat stiffened wall panel structure and forming method thereof
  • Suture technique enhanced foam sandwich hat stiffened wall panel structure and forming method thereof
  • Suture technique enhanced foam sandwich hat stiffened wall panel structure and forming method thereof

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Example Embodiment

[0026] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0027] figure 1 Shown is a schematic structural diagram of the prior art, figure 2 Shown is a schematic cross-sectional view of the structure of the present invention, image 3 Shown is a schematic cross-sectional view of the structure of the present invention along the direction of the rib, wherein the reference numerals are: hat-shaped rib 1 , skin 2 , foam core 3 , and seam 4 .

[0028] like Figure 1 to Figure 3 As shown, the suture technology of the present invention enhances the foam sandwich hat-shaped reinforced wall panel structure, including hat-shaped ribs 1 and skins 2, the hat-shaped ribs 1 are fixed on the skin 2, and the hat-shaped ribs 1 are connected with the skin. A cavity is formed between the skins 2, and the cavity is filled with a foam core 3, wherein: the hat-shaped reinforced wall panel structure passes through the...

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Abstract

The invention relates to an improved suture technique enhanced foam sandwich hat stiffened wall panel structure and a forming method thereof, belonging to the technical field of fiber composite enhancement. The foam sandwich hat stiffened wall panel structure is characterized in that the suture technique is used for the foam sandwich hat stiffened wall panel and is used for improving the strength and stiffness of the hat stiffened wall panel. The method comprises the following steps: firstly, laying hat ribs and skin on a stiffened wall panel mould; secondly, perforating a foam core material along the thickness direction according to the pre-designed perforation pattern (the perforation directions of front and rear rows are symmetric along the vertical foam centerline) in a foam sandwich; thirdly, suturing upper and lower panels and the core material with a suture together; finally, combining and packaging the hat ribs, and solidifying. The strength, stiffness and stability of the composite hat stiffened wall panel structure are obviously improved. According to the bearing capacity required by the enhanced hat stiffened wall panel, the suture parameter meeting the requirement can be designed. The suture foam sandwich structure provided by the invention has the advantages of strong bearing capacity, simple manufacturing process, high structural efficiency and low manufacturing and maintenance cost.

Description

technical field [0001] The invention belongs to the technical field of fiber composite material reinforcement, and in particular relates to a reinforced foam sandwich cap-type reinforced wall plate structure and a forming method thereof by using an improved stitching technology. Background technique [0002] Composite hat-shaped stiffened wall plate structure is widely used in aeronautical structures due to its good post-buckling load capacity, high specific stiffness, good structural stability, high efficiency of transferring circumferential load, and good weight reduction effect. First choice for tubular structural components such as fuselage sections for large passenger commercial aircraft. [0003] However, a slender cavity structure will be formed between the hat-shaped rib and the skin, thereby reducing the stability of the hat-shaped stiffened panel. At present, some scholars fill the cavity of the hat-shaped stiffened panel with foam to improve the bending stiffness...

Claims

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Application Information

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IPC IPC(8): B64C1/12B29C69/00B29C65/62
Inventor 李勇还大军李吻肖军
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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