增强层缠绕角度和聚偏二氟乙烯(PVDF)表面粗糙度是影响内衬PVDF热塑功能层的玻璃纤维复合材料缠绕管弯曲性能的重要因素.采用3种规格的石英砂对PVDF管进行喷砂处理以获得不同的表面粗糙度,以PVDF管为芯模,采用湿法缠绕制作复合材料管.采用四点弯曲测试方法,测试分析如上2种因素对复合材料管弯曲性能的影响.结果表明,PVDF内衬层经过24 mesh喷砂处理后,随者缠绕角度的增大,缠绕管的弯曲强度逐渐减小,而曲率半径先增大后减小,其中采用[+ 45/-45]4缠绕结构的复合材料管曲率半径最小.随喷砂颗粒增大,复合材料管弯曲强度和曲率半径略有增大,弯曲失效后刚度退化趋于缓慢.
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