Reinforced composite material fold channel sandwich structure as well as preparation method and application thereof

A composite material, sandwich structure technology, applied in the superstructure, chemical instruments and methods, transportation and packaging, etc., can solve the problems of mechanical properties to be improved, the preparation process of the sandwich structure is complicated, etc., to improve the scope and potential of engineering applications , improve the anti-instability ability, improve the effect of carrying capacity

Pending Publication Date: 2022-04-12
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the development of aviation technology, the requirements for the weight and mechanical properties of aeronautical structures are getting higher and higher. The combination of carbon fiber composite materials and sandwich structures has opened up new ideas for lightweight design and application. Composite sandwich structures have become a research topic. Hotspots, new structural forms emerge in endlessly, but the preparation process of the existing composite sandwich structure is complicated, and the mechanical properties per unit mass still need to be improved

Method used

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  • Reinforced composite material fold channel sandwich structure as well as preparation method and application thereof
  • Reinforced composite material fold channel sandwich structure as well as preparation method and application thereof
  • Reinforced composite material fold channel sandwich structure as well as preparation method and application thereof

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preparation example Construction

[0037] The present invention also provides a method for preparing the reinforced composite wrinkled channel sandwich structure described in the above technical solution, comprising the following steps:

[0038] arranging several corrugated plates in parallel at intervals in the horizontal direction, the corrugations of the corrugated plates are perpendicular to the horizontal plane, and filling foam in the gaps between the corrugated plates to obtain a foam-coupled corrugated core;

[0039] The foam coupling pleated core is bonded between the upper panel and the lower panel, and after curing, a reinforced composite material pleated channel sandwich structure is obtained.

[0040] In the present invention, several corrugated boards are arranged in parallel at intervals in the horizontal direction, and the folds of the corrugated boards are perpendicular to the horizontal plane, and foam is filled in the gaps between the corrugated boards to obtain a foam-coupled corrugated core....

Embodiment 1

[0047] The flowchart of preparing reinforced composite wrinkled channel sandwich structure in this example is as follows figure 1 shown.

[0048] Arrange three corrugated plates in parallel and evenly spaced on the lower panel, and the corrugation of each corrugated plate is perpendicular to the lower panel to form a corrugated channel core; foam is filled into the voids of the corrugated channel core, the upper surface covers the upper panel, and The components are bonded by epoxy resin to obtain a reinforced composite corrugated channel sandwich structure.

[0049] The preparation method of the corrugated plate is: prepreg the carbon fiber resin matrix composite material according to [45 / 0 / -45 / 90] s Layers were laid in a manner, and kept at 150° C. for 30 minutes to obtain a corrugated board; the wall thickness of the corrugated board was 1 mm. The corrugated plate was cut into a preset size by a CNC machine tool, with a length of 78 mm and a height of 21 mm.

[0050] The...

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Abstract

The invention provides a reinforced composite material fold channel sandwich structure and a preparation method and application thereof, and relates to the technical field of composite materials. The coupling enhancement design of the foam and composite material fold channel sandwich structure is adopted, the structure is simple, and preparation is easy; according to the reinforced composite material corrugated channel sandwich structure, the anti-instability capacity of the corrugated core structure is improved in a foam filling mode, meanwhile, the bearing capacity of the reinforced composite material corrugated channel sandwich structure under the unit mass can be remarkably improved by means of the characteristic that foam is light, and the engineering application range and potential of the composite material sandwich structure are improved.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a reinforced composite material pleated channel sandwich structure and its preparation method and application. Background technique [0002] Advanced composite materials have been widely used in aerospace and other fields due to their excellent characteristics such as high specific strength, high specific stiffness and strong material designability. Throughout the development in the past 40 years, the proportion of composite materials used in aircraft structures has increased from about 5% in the early stage to more than 50% now. The use of advanced composite materials can not only greatly reduce its structural weight, but also greatly reduce the corresponding maintenance and maintenance costs. [0003] With the development of aeronautical technology, the requirements for the weight and mechanical properties of aeronautical structures are getting higher and higher. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B27/04B32B27/00B32B1/06B62D29/00B63B3/68B64C1/00
Inventor 闫雷雷朱柯宇彭静陈牛张聪郑锡涛
Owner NORTHWESTERN POLYTECHNICAL UNIV
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