纤维取向对三维四向编织复合材料与层合复合材料振动性能的影响

Effects of Fiber Orientation on Modal Experimental Analysis of Three-dimension and Four-direction Braided Composites and Laminated Composites

通过实验方法对不同纤维取向角度的炭纤维三维四向编织复合材料和层合复合材料振动性能进行了研究,根据实验结果分析了纤维取向角度对两种结构复合材料振动性能的影响,并对两种结构的动态性能进行了比较。实验表明:随着纤维取向角度的增加,两种结构的同阶次固有频率都减小,同阶次损耗因子都增大。但在纤维取向角度基本相同的情况下,三维四向编织复合材料的固有频率比层合复合材料同阶次的固有频率高,层合复合材料的损耗因子比三维四向编织复合材料同阶次的损耗因子大。

The dynamic mechanical properties of carbon fiber three-dimension and four-direction braided composites and laminated composites with different fiber orientation angle were studied. The effect of different fiber orientation angle on the vibration properties of carbon fiber three-dimension and four-direction braided composites and laminated composites were analyzed. The experimental results show that with the fiber orientation angle increasing, the natural frequency of composites decrease and loss factor increase. The three-dimension and four-direction braided composites has larger natural frequency and specific stiffness, however with the same order, the loss factor of the laminated composites is larger.