通过电磁场仿真和实验,研究了导电短纤维的分散性对其吸波性能的影响。仿真结果表明,对于单根纤维,电磁波电场平行纤维极化时的电磁损耗明显大于垂直纤维极化时的损耗;对于多根平行纤维,随着纤维间距变小、团聚程度增加,其电磁损耗明显降低。采用模压成型工艺分别制备了短切碳纤维具有不同分散状态的树脂基复合材料层板,并进行了反射率测试。实验结果表明,短切碳纤维分散均匀性差层板试样,其吸波性能较差;而利用特殊工艺获得的短切碳纤维均匀分散的层板具有优异的吸波性能。
Effect of dispersion of conductive short-fiber on its radar absorbing property wass studied by simulations and experiments. The simulating results show that electromagnetic loss with the electric field polarizing in parallel with the fiber was more powerful than that perpendicularly to it for a single fiber. Moreover, for paral- lel fibers, the loss decreases remarkably as the interval decreases, i. e. , the degree of aggregation increases. The composite laminated plates derived from different dispersive processing of carbon fiber were prepared using mould pressing forming and the reflectivities are measured. The results show that the radar absorbing perform- ance for the plate derived from homogeneously dispersive fiber is better and that from inhomogeneously dispersive one is worse.
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