The main impact points of the projectmay be addressed in the:

• Reliable and reproducible detection of unknown and potentially multiple contaminations on adherent surfaces and poor bond quality in bonded adhesive joints.• Demonstrated methods capable of field measurements in aircraft manufacturing and repair environments in terms of detection limits and measuring speed.• Maturation of END techniques (TRL 5 and 6) which can effectively assess the surface or bondiline quality.• Automation and industrialization of robust ENDT techniques.• Evidence for the potentials and certification of CFRP bonding in load-critical primary aircraft structures which can lead to weight and cost reduction.

Quality Assurance Conceptsfor Adhesive Bondingof Aircraft Composite

Structures by Extended NDT

AGI - Germany

AGI - France

http://combondt.eu

Coordinated by

Consortium PartnersImpact

This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 636494.

This project is endorsed by the European Aeronutics Science Network

Contract Number: 636494Start Date: 01.05.2015 • Duration: 36 months

Coordinator: Fraunhofer IFAM • Contact Person: Mr. Kai BruneMore details: info@combondt.eu

Design by EASN-TIS

© IFAM Fraunhofer

ComBoNDT project meets the European Aviation Safety Agency (EASA) certification requirements for structural bonding. The extended non-destructive techniques used in ComBoNDT aim at establishing reproducible and reliable NDT tools to ensure the reliable strength of joint structures.

The overall objective of ComBoNDT is to develop a quality assurance concept for adhesive bonding of load-critical CFRP primary aircraft structures, which is applicable within the whole life cycle of the aircraft to overcome the current limitations regarding certification of composites.

Inspection of Adherent Surfaces (Manufacturing & Repair)

Assessment of Bondline Quality (Manufacturing & Repair)

Mechanical TestingCharacterization of the effect of multiple contamination scenarios (production and repair) on the fracture toughness of adhesively

bonded CFRP plates, introduction of the centrifuge test.

• Optimization of the Laser Induced Breakdown

Spectroscopy. Increment of efficiency, automation via robotic

arms (LIBS).

• Improvement of accuracy and results’ reliability of the

Optically Stimulated Electron Emission (OSEE).

• Introduction of new techniques of signal processing for

increasing the detectability of the Full-Field-Vibrometer.

• Industrialization of the equipment – amelioration of the

accuracy of the E-NOSE technique.

• Adaption and improvement of the Aerosol-Wetting-Test

BoND Tispect.

• Automation of the inspection-Adaption of robotic arms for

performing FTIR Spectroscopy.

• Development and amelioration of the Symmetrical Laser

Shock-Wave Adhesion testing platfrom.

• Enhancement of the Electromechanical Impendence

technique’s applicability, cost and equipment downsizing.

• Implementation and adaption of new ultrasonic analysis

techniques.

• Development of commercial and portable equipment based

on Magnetostrictive Sensors.

• Identification of defects in the bond line with the use of

X-Ray CT.1st StepMaturation of ENDT techniques to detect:• Different multliple surface contaminations down to a certain threshold value (pre-bond) on test coupons.

• Weak bonds due to multiple contaminations/ poorly cured adhesive (post-bond) on test coupons.

2nd StepAdaptation & improvement of ENDT in terms of:

• Pre-bond/post-bond inspection on pilot samples with realistic geometries.

• Automation and industrialization of ENDT techniques, including its use on a demonstrator and automated data evaluation.

• Validation of measuring results/round robin test.

State of the ArtENDT techniques can detect:

• Weak bonds due to single contaminations / poorly cured adhesive (postbond) on simple geometries.

• Single surface contaminations (prebond) on simple samplegeometries.

About ComBoNDT Achievements and Innovations

© AIRBUS Group

© GMI AERO