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Multi-wall sandwich structure carbon fiber composite material and preparation method thereof

A technology of sandwich structure and composite material, applied in the field of carbon fiber composite material forming process, can solve the problems of skin and sandwich structure failure and debonding, stress concentration, poor overall mechanical properties, etc., to improve quality stability, uniform distribution Load distribution, the effect of improving the integrity

Active Publication Date: 2021-04-30
CHENGDU AERONAUTIC POLYTECHNIC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above problems in the prior art, the purpose of the present invention is to provide a multi-wall sandwich structure carbon fiber composite material and its preparation method, which can effectively solve the failure of the skin and sandwich structures in the existing technology for preparing carbon fiber composite materials Problems with debonding, stress concentrations and poor overall mechanical properties

Method used

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  • Multi-wall sandwich structure carbon fiber composite material and preparation method thereof
  • Multi-wall sandwich structure carbon fiber composite material and preparation method thereof
  • Multi-wall sandwich structure carbon fiber composite material and preparation method thereof

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Embodiment 1

[0035] This embodiment 1 provides a multi-wall sandwich structure carbon fiber composite material and a preparation method thereof, comprising the following steps:

[0036] Step (1) Processing and cutting of main body foam core, foam sheet, carbon fiber fabric and carbon fiber prepreg:

[0037] Take the center line as the base point of the main body foam core and use a milling cutter to process a rectangular groove above it with a distance of 8cm from the center line, 1.5cm from the upper edge, 3cm from the lower edge, and 1.5cm deep. A rectangular slit with a length of 3 cm and a width of 0.12 cm, the first slit is 4 cm from the left side of the rectangular slot, the second slit is 4 cm from the first, the third slit is 4 cm from the second, and the foam sheet is processed with a band saw It is a sheet with a length of 16cm, a width of 1.5cm and a height of 0.25mm. The number of foam sheets is 6. The carbon fiber fabric is cut into a carbon fiber fabric with a length of 4cm, ...

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Abstract

The invention discloses a multi-wall sandwich structure carbon fiber composite material and a preparation method thereof, and belongs to the technical field of a carbon fiber composite material forming process. A co-curing and liquid forming mode is adopted for three prefabricated parts of upper and lower covers, a beam and a sandwich material, a reinforcing material is impregnated with resin, and the prefabricated parts can communicate with one another, so that the overall synergistic effect mechanism of the component is exerted, the quality stability of the sandwich structure is improved, the purposes of uniformly distributing loads on all parts, reducing the weight of the structural part and improving the overall performance are achieved, and the problems of failure debonding, stress concentration and the like of the cover and the sandwich structure in a traditional forming process are solved.

Description

technical field [0001] The invention relates to the technical field of carbon fiber composite material forming technology, in particular to a carbon fiber composite material with a multi-wall sandwich structure and a preparation method thereof. Background technique [0002] With the rapid development of the aerospace industry, carbon fiber composite materials are widely used in aircraft structural materials due to their high specific strength, large specific modulus, strong designability, high temperature resistance, and fatigue resistance, showing great application potential. At the same time, the aerospace field also puts forward more stringent requirements for the structural weight reduction, integration and low-cost manufacturing technology of carbon fiber composite materials. Composite sandwich structural parts (such as wings, rudders, etc.) are mostly formed by autoclave during the manufacturing process, but the manufacturing cost of the autoclave process is high, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/36B29C70/54
CPCB29C70/36B29C70/54Y02T50/40
Inventor 李彩林付成龙郭少云黄频波吴悦梅吴浩然穆天杨
Owner CHENGDU AERONAUTIC POLYTECHNIC
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