The subject of our intervention will be :
Steel to Composites structural bonding (hybrid structures) measurement in Lightweight Marine transport applications
Steel and composites can be bonded together using adhesives, forming a hybrid (steel-composite) joint. Despite of the many benefits of composite and hybrid joints, the lack of guidelines for approval and design has prevented their uptake by the maritime industry, limiting their usage to secondary structures. This is partly because the long term behaviour and failure of hybrid joints is not yet understood.
The EU funded R&D project QUALIFY aims at filling his knowledge gap, enabling the development of such guidelines. The work presented here is done within this project (www.qualify-euproject.com). Qualify fits in the framework of the INTERREG 2Seas program.
One of the work packages deals with a reliable inspection protocol and in-situ repair device to preserve the integrity of the monitoring mechanism within the bond.
The presented work here will deal with the use of FBG sensors to fulfill this monitoring gap.
First an overview of the sensing technique will be given, highlighting the repairability of the technique once embedded in a host material (e.g. bonded joint).
Second, some examples of long term monitoring projects will be given.
And third, some of the results of the integrity monitoring work package within Qualify will be shown.
Com&Sens received financing for this project from: