Materials Reports  2019, Vol. 33 Issue (Z2): 121-124 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Co-curing Design of Lightning-resistant Copper Mesh Rubber Film and theLightning Strike/Failure Load Test of Carbon Fiber Honeycomb SandwichStructure |
| LI Linjie, MA Ziguang
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| China Helicopter Research and Development Institute, Jingdezhen 333001 |
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Abstract In order to effectively prevent the helicopter carbon fiber honeycomb sandwich skin from lightning strike damage, copper mesh rubber film was laid on the surface of honeycomb sandwich structure. A+B+C+D and D+B+C waveforms were used to lightning strike test, include 7 kinds of typical honeycomb sandwich structures for different lightning attachment zones of helicopter. The shear test was used to compare the failure load of the pieces before and after lightning strike test or the influence of copper mesh rubber film. It is proved that laying copper mesh rubber film on the surface of honeycomb sandwich structure can effectively prevent lightning strike, large-area ablative of matrix, delamination and exfoliation are not found. In the failure load test, the honeycomb sandwich structures are wrinkling damage in the direction of the loading. There are no obvious differences on the attenuation of the failure load, between pieces before and after lightning strike test,the maximum attenuation is 4.5 percent. Copper mesh rubber film is helpful to improve the failure load of pieces,type C increased by 26.9 percent compared with type H. The dispersion of failure load are relatively small,the maximum dispersion is 10.4 percent.
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Published: 25 November 2019
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| About author:: Linjie Li, master, engineer. The research direction is helicopter strength design,in his working life, he had participated in the strength design of multiple helicopters and solved many difficulties. |
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