This study deals with a structural health monitoring approach for adhesively bonded carbon fiber reinforced polymer joints. A modification of an epoxy based adhesive film with single wall carbon nanotubes allows for electrical resistance measurements through the joint. Cyclic fatigue tests of adhesively bonded scarf joints with simultaneous electrical resistance measurements are conducted to investigate the damage detection and localization of repaired composite parts during operation. The measured electrical resistance changes are compared to results from digital image correlation. Crack initiation and growth can be detected by an increase of electrical resistance. Furthermore, it is possible with parallel oriented ink-jet printed circuits to localize the damages occurred.

这项研究涉及一种用于粘合碳纤维增强聚合物接头的结构健康监测方法。用单壁碳纳米管对基于环氧的粘合膜进行的修改允许通过接缝进行电阻测量。进行了粘结的丝巾接头的循环疲劳测试，同时进行了电阻测量，以研究在操作过程中损坏的检测和修复后的复合零件的定位。将测得的电阻变化与数字图像相关性的结果进行比较。裂纹的产生和扩展可以通过电阻的增加来检测。此外，利用平行取向的喷墨印刷电路可以定位发生的损坏。