固化制度对吸湿后复合材料基材二次胶接性能影响研究  

The study of Curing Parameters Effect on Secondary Bonding of Moisture Absorbed Adherend

作　　者：余永波 刘宇婷 晏冬秀 YU Yongbo;LIU Yuting;YAN Dongxiu(COMAC Shanghai Aircraft Manufacturing Co.,Ltd.,Shanghai 201324,China)

机构地区：[1]中国商飞上海飞机制造有限公司,上海201324

出　　处：《高科技纤维与应用》2023年第3期43-50,共8页Hi-Tech Fiber and Application

摘　　要：针对航空复合材料典型碳纤维织物预浸料,开展了待胶接基材的吸湿规律以及固化制度对二次胶接性能影响研究。通过试验建立了典型碳纤维织物基材的吸湿规律,掌握了与之匹配的环氧胶膜的二次胶接性能。通过G IC(Ⅰ型层间断裂韧性)力学性能测试,以及对比分析,从固化时间、温度、压力等方面建立了吸湿后待胶接基材的二次胶接性能变化规律。结合前期研究结论,对固化吸湿后基材胶接性能的影响规律进行探索。分析认为:基材吸湿后胶接,水汽主要使胶膜的树脂碎片化、不连续,无法有效传递载荷。二次胶接固化中,水汽与固化制度耦合作用,固化时间越长,树脂的碎片化程度越严重,性能越低。According to the typical carbon fiber fabric prepreg of aviation composite materials,the moisture absorption law of the substrate to be bonded and the effect of curing system on the secondary bonding performance were studied.The moisture absorbed properties of typical carbon fiber fabric substrate and the secondary bonding properties of high temperature epoxy film were obtained by experiments.Based on G IC(type I interlaminar fracture toughness)mechanical property test and comparative analysis,the variation law of secondary bonding properties of the substrate to be bonded after moisture absorption was established from the aspects of curing time,temperature,and pressure.Combined with the previous research conclusions,the effect of curing on the adhesive properties of the substrate after moisture absorption was explored.The analysis shows that the resin of the film is fragmented and discontinuous due to moisture absorption of substrate to be bonded,and the load cannot be transferred effectively.The longer the curing time,the more serious the fragmentation degree and the lower the properties of the adhesive film.

关 键 词：吸湿率 二次胶接 固化制度 影响规律 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ323.5[化学工程—合成树脂塑料工业]