Damage repair process and device for carbon-fiber-enhanced thermoplastic super-hybrid composite laminates

Abstract

The invention relates to a damage repair device for carbon-fiber-enhanced thermoplastic super-hybrid composite laminates. The damage repair device comprises an electrode, a pressure giving assembly and a power supply assembly. The electrode comprises a vertical type point pressure upper electrode body, a vertical type point pressure lower electrode body, a horizontal rolling pressure upper electrode body and a horizontal rolling pressure lower electrode body. The portions, in contact with a component, of the vertical type point pressure upper electrode body and the vertical type point pressurelower electrode body are sleeved with ceramic pressure rings. The lower electrode bodies are fixed, and the pressure giving assembly drives the upper electrode bodies to move downwardly to give the constant pressure to the component. The horizontal rolling pressure upper electrode body and the horizontal rolling pressure lower electrode body rotate at the same angular speed in opposite directions. Rolling friction with the component is generated when the horizontal rolling pressure upper electrode body rolls along the upper surface of the component and the horizontal rolling pressure lower electrode body rolls along the lower surface of the component. The power supply assembly can adjust the current under the synergistic effect of a built-in power source and a transformer, and the currentparameter changes according to the super-hybrid composite laminates with different sizes and made of different materials. The damage repair device and method have beneficial effects that the energy consumption is low, the method is simple and easy to implement, the repair cycle is short, and the repair cost of composites is reduced greatly.

Description

technical field [0001] The invention relates to a damage repair process and a device for a carbon fiber reinforced thermoplastic super-hybrid composite laminate, belonging to the technical field of damage repair of composite materials. Background technique [0002] As a load-bearing member, the super-hybrid composite laminate is inevitably subjected to impact and alternating loads during its service stage, resulting in damage failure, which mainly includes matrix cracking, interface debonding, fiber fracture and delamination. At present, the damage repair processes of fiber-reinforced super-hybrid composite laminates mainly include the following: 1. Remove a single damaged ply by peeling off, and add a replacement ply to restore the performance of the layered composite material. Process for repairing complex layered composite materials as described in Chinese patent document with document number CN103358660A. 2. Brush the interlayer adhesive in the defect reinforcement area...

AI Technical Summary

Problems solved by technology

[0003] The first method is the digging method, and its disadvantage is that the interlayer performance of the composite laminate is further damaged and the process is complicated and the conditions are harsh.

The second method is the adhesive patching method. Its disadvantage is that it seriously affects the appearance size of the component and cannot be applied to the appearance cover and the streamlined components.

The third method is the mechanical connection repair method, its disadvantage is that it destroys the continuity of the fiber and the bolt connection is prone to electrochemical corrosion and stress corrosion, which will cause further damage

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