The effect of different length-diameter ratios of carbon fibers (CF) on damping property of CF/EP composites was investigated.The CF was coated with copper structurally and the copper coated CF (Cu-CF) was verified by SEM.The mechanical,electrical and damping properties of composites were studied.The results show that the copper plating is coated on the surface of CF uniformly;the addition of a little large length-diameter ratio CF can enhance the impact strength of CF/EP composites effectively, while the bending strength decreases;the addition of more small length-diameter ratio CF can also improve the mechanical properties of the composites.In addition, the large length-diameter ratio CF can heighten the conductivity and damping property of composites easily.%研究不同长径比的碳纤维(CF)对环氧树脂阻尼性能的影响,从结构设计上对CF镀铜处理,采用SEM对镀铜CF(Cu-CF) 进行验证,并研究Cu-CF/EP复合材料的力学、导电以及阻尼性能.结果表明:CF表面镀铜均匀;加入较少量大长径比CF能很好地提高复合材料的冲击强度,但是弯曲强度却明显降低,而加入较多的小长径比CF对材料的力学性能有所增强.此外CF-P3200能很好地提高复合材料的导电性能和阻尼性能.
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