混杂比对交织芳纶碳纤维复合材料力学性能的影响

为了分析混杂比对层内混杂复合材料力学性能的影响，利用交织方式制备芳纶碳纤维混杂增强体织物，并通过交织物纬纱系统中芳纶与碳纤维的纱线配置比例调整碳纤维在增强体结构中的混杂比。采用真空辅助成型技术制备层内混杂结构的芳纶碳纤维混杂（ACFH）复合材料，并对复合材料的拉伸性能、弯曲性能和冲击性能进行测试。结果表明，增强体纬向系统中芳纶与碳纤维的不均质性对ACFC复合材料经方向上的拉伸强度起消极作用；混杂比的增加对ACFC复合材料的纬向拉伸破坏和弯曲损伤具有抑制作用；纬向上，ACFC复合材料的拉伸强度最高提高了近6倍，弯曲强度最小增加了4.04倍；芳纶与碳纤维混杂协同作用有利于ACFC复合材料的抗冲击性能改善，且混杂比存在最佳值。

Influence of Hybrid Ratio on Mechanical Properties of Aramid/Carbon Hybrid Fiber Composites with Interwoven Structure

To analyze the effect of hybrid ratio on the mechanical properties of intralayer hybrid composites， an aramid/carbon fiber-hybrid-reinforced fabric was prepared by interweave， and the blending ratio of carbon fiber in the reinforcement structure was adjusted by the ratio of aramid fiber to carbon fiber in the weft yarn system. The aramid/carbon fiber?reinforced epoxy composites with a hybrid structure were prepared by vacuum assisted molding， and their tensile， flexu?ral and impact properties were investigated. The results indicated that the heterogeneity of aramid and carbon fibers in the latitudinal reinforcement system had a negative effect on the tensile strength of the composites in the warp direction. The increase of hybrid ratio could inhibit the tensile and bending damage of the composites. In the weft direction， the tensile strength and bending strength of the composites increased by 6 and 4.04 times. The synergistic effect of aramid and carbon fibers leads to an improvement in the impact resistance of the composites as well as an optimal hybrid ratio.