碳纤维与玻-碳层间混杂2.5维机织复合材料的力学性能对比研究

Comparative Study on Mechanical Properties of Carbon Fiber and Glass-Carbon Fiber Interlaminar Hybrid 2.5D Woven Composites

2.5D机织复合材料由于具有特殊的层间联锁结构和相对成熟的织造、制备技术,在很多领域得到了广泛关注和应用。本工作制备了一种碳纤维2.5D机织复合材料和一种碳纤维-玻璃纤维混杂的2.5D机织复合材料。对两种复合材料经向和纬向的压缩、弯曲及剪切性能进行研究,并分析结构与性能间的关系。结果显示:2.5D织物经向压缩强度高于纬向,也优于2.5D混杂织物复合材料,而2.5D织物与2.5D混杂织物复合材料纬向压缩强度十分接近;2.5D织物与2.5D混杂织物复合材料经向弯曲强度差别不大,2.5D织物纬向弯曲强度则明显高于2.5D混杂织物复合材料;2.5D织物纬向最大层间剪切强度大于经向层间剪切强度,2.5D织物与2.5D混杂织物复合材料经向剪切强度差别不大,而2.5D混杂织物复合材料纬向剪切强度远低于2.5D织物复合材料。

Due to the special interlayer interlocking structure and relatively mature weaving and preparation technology,2.5 D woven composites have been widely concerned and applied in many fields.In this work,a carbon fiber 2.5 D woven composite and a hybrid 2.5 D woven composite of carbon fiber and glass fiber were prepared.The compression,bending and shear properties of two composites in warp and weft directions were studied,and the relationship between structure and properties was analyzed.The results show that the warp compressive strength of 2.5 D fabric is higher than that of weft,and it is also better than that of 2.5 D hybrid fabric composites;the weft compressive strength of 2.5 D fabric and 2.5 D hybrid fabric composites is very close;the warp bending strength of 2.5 D fabric and 2.5 D hybrid fabric composites is similar,and the weft bending strength of 2.5 D fabric is significantly higher than that of 2.5 D hybrid fabric composites;2.5 D fabric weft maximum interlaminar shear strength is greater than the warp interlaminar shear strength;there is little difference between 2.5 D fabric and 2.5 D hybrid fabric composites in the warp shear strength,while the weft shear strength of 2.5 D hybrid fabric composites is much lower than that of 2.5 D fabric composites.