Self-repairing three-dimensional carbon fiber/memory alloy aircraft shell layer and preparation method thereof

Abstract

The invention provides a self-repairing three-dimensional carbon fiber / memory alloy aircraft shell layer and a preparation method thereof. The self-repairing three-dimensional carbon fiber / memory alloy aircraft shell layer comprises carbon fiber-based three-dimensional base cloth and a self-repairing polymer filler. The preparation method specifically comprises the following steps: taking carbon fiber as weft yarn and a wavy memory alloy as warp yarn, adopting a three-dimensional angle interlocking structure, and interweaving each two layers of the warp yarn with the weft yarn in the thicknessdirection to prepare three-dimensional angle interlocking base cloth; immersing the three-dimensional angle interlocking base cloth in electrolyte for anodic oxidation treatment, and carrying out cleaning and drying to obtain oxidized three-dimensional angle interlocking base cloth; and after uniformly mixing repairable epoxy resin and polyethersulfone, putting the mixture into a mold, flatly paving micro-capsules containing photosensitizer in the mold, soaking the base cloth in the mold, and carrying out standing adsorption, heating, pressurizing and microwave curing to obtain the self-repairing three-dimensional carbon fiber / memory alloy aircraft shell layer. The shell layer prepared with the method provided by the invention has the advantages of being low in weight, high in strength, capable of self-repairing internal damages, and prolonged in service life.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber aircraft shell materials, in particular to a self-repairing three-dimensional carbon fiber / memory alloy aircraft shell and a preparation method thereof. Background technique [0002] With the increasing development of aircraft and aviation technology, the performance of aircraft is continuously improved, and the structural weight coefficient of aircraft is required to be continuously reduced. Therefore, it poses a huge challenge to the material and structure of aircraft, and light weight has become the main trend of aircraft and aircraft development. . At present, the materials used in aircraft and aircraft shells are mostly conventional materials such as aluminum alloy and steel combined with advanced composite materials. In order to reduce the weight factor of the aircraft, the proportion of composite materials is continuously increasing. Requirements in terms of life, manufacturability an...

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Problems solved by technology

It can be seen from the above prior art that the composite material prepared by combining carbon fiber and polymer material has the characteristics of low density and high strength, but the carbon fiber composite material is prone to produce microcracks of different sizes under the action of external load environment, making the composite The internal layering of the material splits, resulting in a reduction in the bearing capacity and increasing the difficulty of recovery of the composite material. Therefore, carbon fiber composite materials with self-healing properties have become a difficult research point

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