Milestone 5: Design and analysis of the repair

Methods have been developed for a quick assessment of the remaining strength of a damaged structure and the restored strength in case of a bonded patch repair. Within this milestone the demonstrator repair was designed and analyzed.

Milestone 4: Determining the certification approach

As there are no standard certification methods available for adhesive bonded repairs on aerospace structures alternative certification methods have to be investigated. Finally an approach was found were the initial bond strength was substantiated by testing of traveler patches surrounding the repair patch together with an in-service monitoring of the repair patch behaviour by a dedicated SHM system.

Milestone 2: Determining the demonstration structure

As there are many composite materials and repair methods in use a selection of a representative demonstration platform is needed. The repair of a sandwich structure was selected to demonstrate the repair and airworthiness certification of the repair.

Milestone 1: Literature review

As there are many composite materials and repair methods in use a selection of a representative demonstration platform is needed. The repair of a sandwich structure was selected to demonstrate the repair and airworthiness certification of the repair.