Advanced monitoring of structural adhesive joints during ageing tests through embedded sensors

Applications of adhesive joints are increasing because of new material combinations that are used. The little experiences in structural adhesive joints involves a lot of questions, one of the main questions, is the reliablity of the joint wich is affected by moisture, UV, temperature and other ageing parameters. By monitoring the structural health there will be tried to define the reliability of the joint. This research focuses on the Fibre Bragg Grating (FBG) sensor technology for monitoring the structural health of the joint. FBG sensors are steadily being developed as a reliable, in situ, non-destructive tool for monitoring and analyzing the integrity of large and costly structures. Especially in composite structural applications, this strain measuring technique has proven to be very advantageous. However, its use in adhesive bonding applications is limited up till now, because of the many issues involved. These concern the practical embedding of such sensors and the difficulties in distinguishing between measurement data of mechanical, thermal or hygroscopic origin. Moreover, the actual embedding of these optical sensor wires has several side effects on the mechanical performance of structural adhesive joints. The aim of this research is to investigate the effect of these embedded glass fiber sensors on the stiffness and strength of simple adhesively bonded joints. And the posibility of measuring the influences of moisture and temperature on the structural joint with the FBG's.

Jaar van publicatie:2021

Toegankelijkheid:Open