国产碳纤维增强树脂基复合材料阻尼性能实验研究

摘要

Damping performance of domestic carbon fiber reinforced composite materials is investigated by vibration-beam experiments. Unidirectional continuous fiber reinforced laminates with different fiber angles were fabricated from T300/605, T300/606 and T300/603 to investigate the effect of matrix and fiber angle on the damping of composites. The results show that, the 603 matrix composite had a higher loss factor than the 605 and 606 in the 0 degree orientation. The 30 degree fiber angle material exhibited a higher loss factor that 0 and 15 degree’s, while its stiffness capacity decreased a lot. For each kind of the composites tested, with the change of vibration frequency, there appeared the maximal loss factor at a certain frequency.%碳纤维增强复合材料的阻尼性能对结构的减振能力具有重要影响。复合材料的阻尼机理与均质的各向同性材料有很大不同。利用瞬态冲击振动梁法得到了不同树脂基体、不同纤维铺层角国产碳纤维增强复合材料的动态特性数据，并提取了模态频率与模态损耗因子，研究了树脂基体材料和纤维铺层角对复合材料动力学性能的影响规律，同时研究了材料的阻尼性能随着振动频率的变化规律。实验结果表明，603基体的复合材料比605基体及606基体的复合材料具有更高的模态损耗因子；同样的基体，增大铺层角，结构柔度增大，损耗因子也增大；随着振动频率变化，在某一频率下，模态损耗因子出现了峰值。