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

A technology for enhancing thermoplastic and damage repair, applied in the field of damage repair technology and its devices, can solve the problems of electrochemical corrosion and stress corrosion damage at bolted joints, demanding complex process conditions, and damage to the interlayer performance of composite laminates, etc. The effect of restoring basic mechanical properties, broad prospects for promotion, and reducing repair costs

Active Publication Date: 2018-03-27
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Effect test

Embodiment 1

[0038] A damage repair device for a carbon fiber reinforced thermoplastic super-hybrid composite laminate, comprising electrodes, a pressure supply component, and a power supply component; the electrodes include vertical point pressing upper and lower electrodes and horizontal rolling upper and lower electrodes; the vertical The contact part between the upper and lower electrodes and the component is sleeved with a ceramic pressure ring; the lower electrode is fixed, and the pressure feeding component drives the upper electrode to move downward and gives constant pressure to the component; the horizontal rolling upper and lower electrodes maintain the angular velocity In the same direction and opposite rotation movement, when the component rolls along the upper and lower surfaces of the component in the horizontal rolling upper and lower electrodes, rolling friction occurs with the component, and relative movement occurs with the component; the power supply assembly is under the...

Embodiment 2

[0047] The damage repair device of the carbon fiber reinforced thermoplastic super-hybrid composite laminate is the same as that of the first embodiment.

[0048] A damage repair process for a titanium alloy / carbon fiber reinforced polyether ether copper matrix composite material laminate to make a vehicle chassis cover, comprising the following method steps:

[0049] The first step is to determine the damage location and scope of the super-hybrid composite laminate chassis cover through ultrasonic testing, and make corresponding marks for repair;

[0050] In the second step, in view of the fact that the vehicle chassis cover is a flat plate member and the damage area is small, vertical point pressure repair electrodes are used for repair, and the upper and lower electrodes are installed on one side edge of the damaged part of the component marked in step 1 place;

[0051] The third step is to work the pressure supply assembly, the lower point pressure electrode is kept fixed...

Embodiment 3

[0056] The damage repair device of the carbon fiber reinforced thermoplastic super-hybrid composite laminate is the same as that of the first embodiment.

[0057] A damage repair process for the leading edge of a wing made of an aluminum alloy / carbon fiber reinforced polypropylene-based composite material laminate, comprising the following method steps:

[0058] The first step is to determine the damage location and extent of the leading edge of the super-hybrid composite laminate wing through ultrasonic testing, and make corresponding marks for repair;

[0059] In the second step, since the leading edge of the wing is a single-curvature bending member and the damage area is large, a horizontal rolling repair electrode is used for repair, and the upper and lower rolling electrodes are installed to the damage of the component marked in step one. one side edge of the part;

[0060] In the third step, the pressure-feeding component works, the lower point pressure electrode is ke...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C73/34
CPCB29C73/34
Inventor 潘蕾马文亮陶杰汪涛丁文烨胡静玲
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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