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Light high-rigidity porous grid carbon fiber honeycomb for space, preparation method and application

A carbon fiber, high-stiffness technology, applied in the field of core material manufacturing, can solve problems such as distortion stress, thermal expansion coefficient mismatch, expansion, etc., and achieve the effect of ensuring stability

Active Publication Date: 2021-02-05
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]In order to solve the problem of distortion, stress expansion, and even structural damage in the space environment caused by the mismatch of thermal expansion coefficients of heterogeneous materials in traditional composite honeycomb sandwich components, The present inventor has carried out intensive research and provided a light-weight, high-rigidity perforated grid carbon fiber honeycomb for space, its preparation method and application, which is prepared by ultra-thin perforated grid carbon fiber prepreg fabric, combined preparation tooling design, honeycomb body Material and shaping co-curing process design realizes the preparation of light-weight and high-rigidity porous carbon fiber honeycomb, which meets the technical index requirements of honeycomb stiffness, outgassing, and temperature-resistance environment, and can be used in aerospace vehicles, large-scale exploration satellites, etc. The manufacture of high-precision and high-reliability lightweight composite sandwich members, thereby completing the present invention

Method used

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  • Light high-rigidity porous grid carbon fiber honeycomb for space, preparation method and application
  • Light high-rigidity porous grid carbon fiber honeycomb for space, preparation method and application
  • Light high-rigidity porous grid carbon fiber honeycomb for space, preparation method and application

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preparation example Construction

[0040] According to a second aspect of the present invention, there is provided a method for preparing a light-weight, high-rigidity porous grid carbon fiber honeycomb, which is used to prepare the light-weight, high-rigidity porous grid carbon fiber honeycomb described in the first aspect, comprising the following steps:

[0041] In step (1), the ultra-thin carbon fiber prepreg is prepared by thinning the high-modulus carbon fiber tow by using the ultrasonic-guided expanded fiber method, and compounding it with the resin film layer. The prepreg surface density is ≤80g / m 2 , the resin mass content is controlled between 38% and 44%;

[0042] Step (2), cutting the ultra-thin high-modulus carbon fiber prepreg obtained in step (1) into extremely narrow carbon fiber prepreg belts on the prepreg cutting equipment, and the bandwidth is controlled within the range of 2 to 6 mm;

[0043] In step (3), the carbon fiber prepreg extremely narrow tape obtained in step (2) is braided in a tw...

Embodiment 1

[0059] A light-weight, high-rigidity porous grid carbon fiber honeycomb for space, the honeycomb cell is a hexagonal grid with holes, the side length of the square hole is 1mm; the hole wall material is solidified with porous grid carbon fiber prepreg fabric In the composite material prepared later, the carbon fiber of the honeycomb is M40 high-modulus carbon fiber, and the resin matrix is ​​a toughened epoxy resin that is resistant to temperature changes, vacuum quality damage, and condensable volatiles in space environments. The honeycomb density is 35kg / m 3 , the diameter of the inscribed circle of the cell is Φ10mm, and the thickness of the hole wall is 0.1mm; the weaving form of the porous carbon fiber fabric composite material is plain weave, and the laying direction and the longitudinal angle of the honeycomb are 45°, such as figure 1 shown.

[0060] The method for preparing the space with a lightweight and high-rigidity porous grid carbon fiber honeycomb includes the ...

Embodiment 2

[0072] A light-weight, high-rigidity porous grid carbon fiber honeycomb for space, the honeycomb cell is a hexagonal grid with holes, the side length of the square hole is 0.5mm; the hole wall material is a porous grid carbon fiber prepreg fabric The composite material prepared after curing, the carbon fiber reinforcement of the honeycomb is M40 grade high modulus carbon fiber, and the resin matrix is ​​a toughened epoxy resin that is resistant to temperature changes in space environments, vacuum quality damage, and condensable volatiles. Honeycomb density is 40kg / m 3 , the diameter of the inscribed circle of the cell is Φ8mm, and the thickness of the hole wall is 0.1mm; the weaving form of the porous carbon fiber fabric composite material is twill weave, and the laying direction and the longitudinal angle of the honeycomb are 0°.

[0073] The method for preparing the light-weight and high-rigidity porous grid carbon fiber honeycomb for the space includes the following steps: ...

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Abstract

The invention provides a light high-rigidity porous grid carbon fiber honeycomb for space, a preparation method and an application. Honeycomb grids are hexagonal grids defined by a pore wall material;and the pore wall material is a porous carbon fiber fabric composite material, and pores in the pore wall material are square pores arranged in a matrix mode. Ultrathin high-modulus carbon fiber one-way prepreg is prepared on the basis of a fiber thinning technology and cut into extremely narrow prepreg blocks, porous grid carbon fiber prepreg fabric is woven to serve as a carbon fiber honeycombpreparation raw material, and a preparation tool is a combined preparation mold of a conformal concave-convex fluctuation upper mold / lower mold, group hexagonal core columns and a side edge limiting block. The prepreg blocks and the hexagonal core columns are sequentially and repeatedly paved on the mold until the required honeycomb breadth is reached, and specific curing pressure suitable for honeycombs with different breadths is applied to finish integrated co-curing of an assembly, so that preparation of the light high-rigidity porous grid carbon fiber honeycomb is realized. The technical index requirements of rigidity, gas escape, temperature alternating environment resistance 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 light-weight, high-rigidity perforated grid carbon fiber honeycomb for space, a preparation method and application. Background technique [0002] Carbon fiber honeycomb is a lightweight, high-performance and designable new structural core material, which can meet the requirements of high precision, high stability, and high reliability of the structural system. It is a typical embodiment of the advanced structure of high-performance lightweight composite materials. European and American countries already have mature preparation technologies for such materials and have realized engineering applications. HECEL and ULTRACOR of the United States have the technical ability to manufacture carbon fiber honeycombs with different carbon fibers, resin systems, and different structural forms, and can complete customized and general-purpose carbon fiber honey...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54B29C70/16
CPCB29C70/342B29C70/543B29C70/54B29C70/16
Inventor 杨智勇左小彪史汉桥杨昆晓何云华尹亮孙宝岗张艺萌王保林
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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