Lightning Protection Performance of Carbon Fiber Composite Matrix Modification/Copper Mesh Combination
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Aviation Maintenance NCO Academy,Air Force Engineering University,Xinyang 464000

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TB332

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    Abstract:

    The traditional carbon fiber reinforced material ( CFRP ) resin matrix has poor conductivity and is prone to lightning damage. In this paper, grapheno-nickel plated carbon fiber powder is used as a conductive filler to modify the conductivity of the resin matrix, and a copper mesh is laid on the surface to conduct simulated lightning current impact tests to test the lightning protection of the matrix modification/copper mesh combination.The conductivity of CFRP laminates with modified resin matrix in the 0°, 90° fiber direction, and thickness direction is 1.1571×104 S/m,1.0871×104 S/m,204.2 S/m,which increased by 1.54 times, 1.16 times, and 433.47 times respectively. Under the impact of simulated lightning current A wave of 200 kA, the unprotected specimen is ignited by an flame after being struck by lightning, and the secondary effect persists, while both single copper mesh and combined protection can suppress the secondary effect. The maximum damage diameter of the unprotected surface is 14.62 cm, and the copper mesh is broken down under this energy.The maximum damage diameter of a single copper mesh protective surface is 19.05 cm, while the maximum damage diameter of a combined protection surface is 8.93 cm, a decrease of 53.12%.Compared with no protection, the internal damage area of single copper mesh and combined protection can be reduced by 66.2% and 96.7% respectively.After the breakdown of a single copper mesh, the resin undergoes vaporization and recoil after ablation, increasing the detachment area of the damaged copper mesh. After the combined protective copper mesh is broken down,the modified resin quickly conducts the current, reducing the detachment of the copper mesh and the internal ablation area.

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History
  • Received:September 05,2021
  • Revised:November 13,2021
  • Adopted:November 16,2021
  • Online: June 26,2023
  • Published: