ComBoNDT @ the September 2017 issue of the EASN Newsletter

ComBoNDT is currently in its third year of activities and several important milestones have been achieved so far. In regards to sample preparation, all the samples were investigated via conventional NDT inspection using two different probes and two different settings respectively. Also, all the mechanical testing, namely mode-I, mode-II and centrifuge tests were completed and the experimental results reveal the negative effect of each contamination scenario in the fracture toughness and adhesive strength of the composite bonds. Also, mechanical tests on pilot samples were conducted in order to evaluate the influence of the surface state on the mechanical properties of the scarfed pilot samples. The results showed that the combined contamination with thermal degradation and de-icing fluid has a negative effect on the mechanical performance of the scarfed repair joints, reducing the failure load. Also during this period, the pilot samples were tested via the ENDT techniques and the partners were working in optimizing the techniques to investigate realistic parts as well as to turn the ENDT automated. Some of the employed ENDT such as LIBS (Laser Induced Breakdown Spectroscopy), OSEE (Optically Stimulated Electron Emission) and AWT (Aerosol Wetting Test) were developed to be handled directly by robot. In addition, partners investigated flat coupons with single and mixed contaminations, curved bonded samples with mixed contaminations, and bonded scarf samples with mixed contaminations within this period.

In December 2017 the demonstration will take place at the IFAM premises in Bremen where the following activities will take place: Repair process (scarfing, surface treatment patching, bonding, etc.), Production process (secondary bonding of stringers above skin, autoclave, etc.), WP3 technique demonstration before bonding, and WP4 technique demonstration after bonding.

Currently the project is organizing its M30 Progress Meeting to take place at the Institute of Aviation in Warsaw, Poland on the 29th of September 2017 within the frame of the 7th EASN International Conference on “Innovation in European Aeronautics Research”.

For more information, please have a look at the  EASN Newsletter.

ComBoNDT images

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 Aeronautics Science Network - EASN.

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