Carbon fiber composite honeycomb and preparation method and application thereof

A composite material and carbon fiber technology, applied in the field of core material manufacturing, can solve problems such as thermal expansion mismatch of heterogeneous materials, structural damage of components, and limited weight loss effect of honeycomb mechanical properties, achieving high comprehensive performance and strong design effects

Pending Publication Date: 2022-02-11
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used aluminum honeycomb, paper honeycomb, and FRP honeycomb core materials have two shortcomings: one is that the mechanical properties of the honeycomb are improved and the weight reduction effect is limited, and the other is that the combination of the honeycomb core and the carbon fiber panel produces a lightweight composite sandwich structure. The thermal expansion does not match, and under the most severe working conditions, it will cause microcracks inside the component to expand and cause structural damage to the component. Therefore, it is urgent to develop a carbon fiber honeycomb preparation method to meet the requirements of lightweight, high-strength, high-modulus sandwich components in aerospace and other fields. need

Method used

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  • Carbon fiber composite honeycomb and preparation method and application thereof
  • Carbon fiber composite honeycomb and preparation method and application thereof
  • Carbon fiber composite honeycomb and preparation method and application thereof

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preparation example Construction

[0066] A method for preparing a lightweight, high-strength, high-rigidity carbon fiber composite material honeycomb, comprising the following steps:

[0067] In step (1), disperse and expand the carbon fiber tow, and compound it with the resin film layer to prepare a unidirectional carbon fiber prepreg, and the surface density of the prepreg is controlled at 20-165g / m 2 Between, resin mass content is controlled between 30%-38%;

[0068] In step (2), the unidirectional carbon fiber prepreg obtained in step (1) is placed on the honeycomb laminate assembly compaction mold according to the optimally designed ply sequence, and each laying 1- 2 layers, vacuum and cold press the laid prepreg;

[0069] In step (3), cold press the prepreg obtained in step (2), and the compaction time is not less than 10 minutes, and the blank is taken out from the layup mold to obtain a hole wall laminate combination that roughly maintains a concave-convex shape Body blank;

[0070] In step (4), acc...

Embodiment 1

[0085] A light-weight, high-strength, high-rigidity carbon fiber composite material honeycomb. The cells of the carbon fiber composite material honeycomb are hexagonal cells surrounded by hole wall materials. figure 1 As shown, the laying direction of the honeycomb surface layer and the longitudinal angle of the honeycomb are 45°. The carbon fiber in the carbon fiber composite material is T700 grade carbon fiber, and the resin matrix is ​​toughened epoxy resin cured at high temperature; the density of the honeycomb body is 72kg / m 3 , the structural parameters (including the cell side length, wall thickness, and layering sequence of the composite) are determined according to the honeycomb density and comprehensive mechanical properties (including plane tension, plane compression, plane shear, long beam bending and lateral pressure properties) According to the design, the specific structural parameters are: the side length of the cell is 5.8mm, the wall thickness is 0.15mm, and...

Embodiment 2

[0099] A light-weight, high-strength, high-rigidity carbon fiber composite material honeycomb. The cells of the carbon fiber composite material honeycomb are hexagonal cells surrounded by hole wall materials. figure 1 shown. The carbon fiber of the carbon fiber composite material is M40 grade carbon fiber, and the resin matrix is ​​toughened epoxy resin cured at high temperature; the honeycomb density is 64kg / m 3 , structural parameters (including cell side length, wall thickness, composite layup sequence), based on honeycomb density and comprehensive mechanical properties (including plane tension, plane compression, plane shear, long beam bending and lateral pressure performance) requirements According to the design, the specific structural parameters are: the cell side length is 5.8mm, the wall thickness is 0.12mm, and the laying sequence of the composite is [60 / 0 / -60]. The laminated assembly is achieved by laying and laminating three layers of unidirectional carbon fiber ...

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Abstract

The invention discloses a carbon fiber composite material honeycomb and a preparation method and application thereof. A hole wall material defining honeycomb hole lattices is a carbon fiber composite material laminated combination body, and the carbon fiber composite material honeycomb is prepared by laying and compacting unidirectional carbon fiber prepreg according to a preset laying sequence. The preparation method comprises the steps: firstly, paving prepreg and carrying out cold pressing to obtain a hole wall laminated combined body blank, then repeatedly paving the laminated combined body blank by utilizing a mold until the width of a honeycomb to be prepared is reached, finally, simultaneously realizing shape maintenance curing and node gluing curing of the laminated combined body, and thus realizing the preparation of the light high-strength high-rigidity carbon fiber composite material honeycomb. The requirements of weight and comprehensive mechanical property indexes (comprising plane stretching, plane compression, plane shearing performance, long beam bending performance and the like) of the honeycomb are met.

Description

technical field [0001] The invention belongs to the technical field of core material manufacturing, and in particular relates to a carbon fiber composite material honeycomb, a preparation method and an application. Background technique [0002] Carbon fiber composite honeycomb is a new type of structural core material with light weight and high performance that can be matched with design. It can meet the requirements of light weight, high strength and high rigidity of composite sandwich structure system. It is the key to the advancement of high performance lightweight composite structure reflect. [0003] American research institutes already have mature preparation technologies for such materials and have realized engineering applications; there are also related research and application reports in Europe. HEXCEL and ULTRACOR of the United States have the technical ability to manufacture carbon fiber composite honeycomb with matching design of different carbon fibers, resin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/00B32B9/04B32B37/08B32B5/12B32B37/10B32B38/00B32B37/06B32B3/12B29C70/34
CPCB32B5/02B32B5/26B32B37/08B32B37/1018B32B5/12B32B37/10B32B38/0004B32B38/00B32B37/06B32B3/12B29C70/345B32B2038/0076B32B2250/20B32B2260/021B32B2260/046B32B2262/106B32B2307/718B32B2307/308B32B2605/00B32B2605/08
Inventor 杨智勇左小彪尚呈元孙建波王月友张会杰何析峻孙宝岗何云华张艺萌
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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