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Corrugated lattice web reinforced composite material sandwich structure and preparation method thereof

A technology for reinforcing composite materials and sandwich structures, applied in chemical instruments and methods, wood layered products, synthetic resin layered products, etc., can solve problems of weak bonding performance, low compressive and shearing resistance, and small contact area and other problems, to achieve the effect of reducing elastic mutation, improving failure mode and improving bearing capacity

Pending Publication Date: 2020-05-29
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 panel 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, which makes the sandwich structure The form cannot be widely used

Method used

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  • Corrugated lattice web reinforced composite material sandwich structure and preparation method thereof
  • Corrugated lattice web reinforced composite material sandwich structure and preparation method thereof
  • Corrugated lattice web reinforced composite material sandwich structure and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] like figure 1 , figure 2 As shown, a corrugated lattice web reinforced composite material sandwich structure includes a core material 1, a corrugated lattice web 2 and a fiber panel layer 3;

[0028] The sandwich structure is a double-layer structure in which two core materials 1 are stacked together, and each core material 1 is cut in a wave shape in the thickness direction, adjacent core materials 1 are cut vertically along the same direction of the chord, and filled at the cut position The fiber cloth is introduced into the resin to form the corrugated lattice web 2, the upper and lower surfaces of the core material 1 are wrapped with the fiber cloth and cured with the resin to form the fiber panel layer 3, and the fiber cloth is one layer.

[0029] The core material 1 is polyurethane foam, the fiber panel layer 3 is uniaxial carbon fiber cloth, and the resin is unsaturated polyester.

[0030] The preparation method of the above-mentioned corrugated lattice web re...

Embodiment 2

[0037] like image 3 As shown, a corrugated lattice web reinforced composite material sandwich structure includes a core material 1, a corrugated lattice web 2 and a fiber panel layer 3;

[0038] The sandwich structure is a three-layer structure in which three core materials 1 are stacked together. Each core material 1 is cut in a wave-like manner in the thickness direction, and adjacent core materials 1 are cut vertically along the chord direction and filled at the cut position. The fiber cloth is introduced into the resin to form the corrugated lattice web 2. The upper and lower surfaces of the core material 1 wrap the fiber cloth and solidify with the resin to form the fiber panel layer 3. The fiber cloth is multi-layered.

[0039] The core material 1 is paulownia wood, the fiber face layer 3 is glass fiber cloth, and the resin includes vinyl resin.

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Abstract

The invention discloses a corrugated lattice web reinforced composite material sandwich structure and a preparation method thereof. The structure is vertically cut according to a waveform in the thickness direction of a core material, the cut core material is wrapped with fiber cloth, and the corrugated lattice web is formed after the fiber cloth and resin are cured; fiber cloth is laid above andbelow the core material, and the fiber cloth and resin are cured to form the fiber panel. The corrugated lattice web reinforced composite material sandwich structure is universally applied to structural parts with large bearing capacity, such as bridge decks, building decks, road decks and anti-collision decks. Compared with other products, the corrugated lattice web reinforced composite materialsandwich structure provided by the invention has the greatest characteristic that the corrugated lattice web can obviously reduce the elastic mutation of the bearing capacity of the sandwich structure, so that the overall stress performance of the composite material sandwich structure is obviously improved.

Description

technical field [0001] The invention relates to a wave-type lattice web-reinforced composite material sandwich structure beam, plate, and shell structure, which is widely used in structural parts with relatively large loads in the fields of construction, bridges, and anti-collision, such as: bridge decks, roads, etc. Panels, wall panels, floor panels, anti-collision panels, etc. Background technique [0002] The composite sandwich structure consists of three parts, including the outermost face plate, the middle core material and the lattice web connecting the core material and the face plate. The outermost panel mainly bears the normal stress caused by bending deformation, and is made of high-strength, high-modulus materials, such as laminated carbon fiber or glass fiber cloth; the middle layer core material provides sufficient section inertia for the sandwich structure, It mainly bears shear stress, and materials such as honeycomb, foam, and balsa wood are commonly used. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/40B32B9/00B32B9/04B32B3/26B32B21/00B32B17/04B32B17/12B32B17/06
CPCB32B5/18B32B5/02B32B5/26B32B5/245B32B3/263B32B21/10B32B2260/023B32B2260/046B32B2262/101B32B2262/106B32B2266/0278B32B2307/50
Inventor 方海郁嘉诚刘伟庆韩娟祝露霍瑞丽方园齐玉军吴鹏
Owner NANJING UNIV OF TECH
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