Patching and repairing method for local damage of carbon-fiber reinforced resin base laminating plate

Abstract

The invention discloses a patching and repairing method for the local damage of a carbon-fiber reinforced resin base laminating plate, which is characterized in that the patching and repairing method comprises the following steps of: excavating damaged positions from a carbon-fiber reinforced resin base laminating plate (1) by layers to form a hollow area (2) to be repaired; cleaning to remove dust and greasy dirt on the surface of the hollow area (2) to be repaired; preparing a prepreg patch (4) corresponding to the boundary of damaged positions on each layer; overlaying one layer of plate glue film (3) on the surface of the hollow area (2) to be repaired; successively overlaying the prepreg patch (4) by layers; and then, co-curing the laminating plate (1) to be repaired. Because the hollow area (2) to be repaired, which is formed by excavating damaged positions by layers, is provided with a wedge-shaped angle theta of 1-3 degrees, the strength recovery value of the repaired laminating plate (1) reaches 90-120%; the upmost layer of the surface of the hollow area (2) to be repaired is overlaid with one layering patch (5) with a big boundary; and after the layering patch (5) is co-cured, the appearance of the layering patch (5) is smooth without affecting the pneumatic appearance of a construction member. Compared with a patching and repairing method on the damaged position, the patching and repairing method for the local damage of the carbon-fiber reinforced resin base laminating plate has the characteristics that growth increment in weight is small.

Description

technical field [0001] The invention relates to a method for repairing local damage of a carbon fiber-reinforced resin-based laminate, in particular to a method for digging and repairing local damage of a carbon-fiber-reinforced resin-based laminate. Background technique [0002] Resin-based composite materials have excellent properties such as high specific strength, specific modulus, and corrosion resistance. Their components are used in many fields such as aviation and aerospace. , during the use of civil aviation airliners, resin-based composite materials will produce local damage and micro-cracks due to repeated loads and humid heat factors. If these damaged parts cannot be repaired in time, it will affect the normal performance of the structural parts, even by This causes macroscopic cracks to break the structural parts and cause major accidents. Due to the high cost of resin-based composite components, structural parts with local damage and micro-cracks are generally...

AI Technical Summary

Problems solved by technology

[0002] Resin-based composite materials have excellent properties such as high specific strength, specific modulus, and corrosion resistance. Their components are used in many fields such as aviation and aerospace. , during the use of civil aviation airliners, resin-based composite materials will produce local damage and micro-cracks due to repeated loads and humid heat factors. If these damaged parts cannot be repaired in time, it will affect the normal performance of the structural parts, even by This causes macroscopic cracks to break the structural parts and cause major accidents

Due to the high cost of resin-based composite components, structural parts with local damage and micro-cracks are generally repaired without re-production and replacement. The repair methods mainly include patch repair and cut-out repair, and patch repair is generally suitable for flat surfaces or small curvatures. The structure, cut-out repair is suitable for repairing the surface with large curvature or aerodynamic shape requirements, and the damage area is large and the damage is serious. At present, there is no stable resin-based composite component cut-out repair method in China that can restore structural strength.

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