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用不同的碳纤维含量(0.3、0.5、0.7)不同的混杂方式(层内、层间混杂方式)的6组0~0碳/玻璃混杂纤维试件(共18个)进行拉伸试验,并监听整个试件破坏过程中的声发射活动、试验表明:(1) 声发射是监测试件从开始受载到最后破坏整个过程的好方法,可为FRP设计提供用有用的参数:(2) 混杂纤维试件产生的声发射总数及各种不同载荷永平的幅度分布与该试件碳纤维含量关系密切,碳纤维含量越低(玻璃纤维含量高)声发射总数越大,声发射事件的幅度越高;碳纤维含量相同时,混杂方式不同的试件在第一次载荷降低时,层内试件超过40db的AE事件幅度高、数量多,层问试件的AE事件幅度数量少,这种现象随碳纤维含量增大逐渐变得不明显。
Tensile tests were performed on six groups of 0-0 carbon / glass hybrid fiber specimens (18 in total) with different hybrid methods with different carbon fiber contents (0.3, 0.5, and 0.7) Acoustic emission during the whole specimen destroying process shows that: (1) Acoustic emission is a good method to monitor the whole process from the beginning to the end of loading and can provide useful parameters for FRP design. (2) Mixed The total number of acoustic emission and the amplitude distribution of various loads at different loads are closely related to the carbon fiber content of the test piece. The lower the carbon fiber content (high glass fiber content), the greater the total number of acoustic emission, the higher the amplitude of acoustic emission events When the carbon fiber content is the same, when the first load is reduced, the AE events with more than 40db in the layers are high in magnitude and large in number, and the AE events in the layers are less in magnitude Carbon fiber content increases gradually become less obvious.