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Apparatus and method for repairing composite panels with conductive layers

A technology of conductive layer and dielectric layer, which is applied in the field of temporary repair device for lightning protection of conductive foil, which can solve the problems of leakage current and inconvenience

Active Publication Date: 2018-01-02
THE BOEING CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a carbon fiber composite structure with an electrical resistance about 2000 times greater than that of aluminum, the carbon fiber laminate (ply) acts as a very high impedance conductor, and the resin between the laminates acts as a high capacitance dielectric layer, so lightning strikes the carbon fiber composite The material causes an increasing potential difference between stacked laminate structures, but there is no readily available conductive path to drain the current

Method used

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  • Apparatus and method for repairing composite panels with conductive layers
  • Apparatus and method for repairing composite panels with conductive layers
  • Apparatus and method for repairing composite panels with conductive layers

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Embodiment Construction

[0017] Temporary repair techniques for foil lightning protection of composite aircraft structures will now be described in the context of composite aircraft wings 10, the structure of which will be described with reference to figure 1 and figure 2 Described below. However, the present disclosure should not be construed to limit the method to aircraft wings 10 . It should be understood that the method can be applied to other structures, as would be appreciated by one of ordinary skill in the art.

[0018] now refer to figure 1 and figure 2 , showing cross-sectional and perspective views of a portion of a wing structure 10 of an aircraft with a plurality of fasteners 12 securing a skin panel 14 of the aircraft structure to an internal substructure or spar 16 . The substructure 16 can be one of many parts of the aircraft, such as, for example, a spar or rib of an aircraft wing or fuselage, or a wall of a fuel tank (not shown).

[0019] The skin panels 14 and spars 16 are ...

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Abstract

A device for repairing a conductive layer of a composite structure comprising a dielectric layer having a perimeter secured to the structure and a conductive layer secured over the dielectric layer and surrounding the entire perimeter of the dielectric layer Affixed to the structure, the conductive layer is treated along its peripheral region to improve the conductive path between the conductive layer and the structure.

Description

technical field [0001] The present application relates generally to aircraft lightning strike protection technology, and more particularly to temporary repair devices and methods for lightning strike protection of conductive foils of composite aircraft skin panels. Background technique [0002] Carbon Fiber Reinforced Plastics (“CFRP”), or also known as CFRP, are used in commercial Utilization in aircraft is increasing. [0003] Lightning striking the aircraft causes high currents to flow through the aircraft frame, typically on the order of 100,000 amperes. In a carbon fiber composite structure with an electrical resistance about 2000 times greater than that of aluminum, the carbon fiber laminate (ply) acts as a very high impedance conductor, and the resin between the laminates acts as a high capacitance dielectric layer, so lightning strikes the carbon fiber composite The material causes an increasing potential difference between the stacked laminate structures, but ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64D45/02B64C3/00
CPCB29L2031/3076B29C73/10B64D45/02B64F5/40B32B37/0046B32B37/12B32B37/18B32B38/0012B32B2038/0016B32B2305/22B32B2307/202B32B2307/204B32B2313/04B32B2605/18B29C65/562B32B3/30B32B15/09B32B37/182B32B2331/00B64C1/12
Inventor P·A·阿克曼W·K·安德森R·J·埃特尔
Owner THE BOEING CO