DEVELOPMENT OF NEW STRUCTURAL AND TECHNOLOGICAL SOLUTIONS FOR AIRCRAFT WINGS AND REPAIR OF COMPOSITE STRUCTURES

Сергей Андреевич Бычков, Александр Витальевич Гайдачук, Алексей Викторович Андреев, Wang Bo

Abstract


It is shown that in the complex problem of the permanent increase in the efficiency of using polymer composite materials in the construction of aircraft in the transport category, an important role is played by the rational choice of structural and technological solutions of their units and assemblies, which significantly contribute to the implementation of high flight-technological and economic characteristics of aircraft competitive on global market for sales and services. A review and analysis of the development of new wing composite structures discussed at the annual international exhibition Sampe 2019 under the NEWS project, formed in accordance with the STELIA Aerospace R&T strategy for the development of composite technologies with high technical and economic potential, is carried out. A detailed description of the experimental integral demonstrator of the wing compartment molded by infusion is given. The advantages of the selected integrated infusion technology are discussed, including minimizing the assembly steps, process automation, an economical autoclave-free molding process and repair of composite structures. The information provided by Airbus representatives on the repair of composite structures during the operation of the aircraft using portable equipment providing a high-quality curing regime for carbon fiber reinforced plastic. The types of structural repair are described. It is noted that structural repairs can be carried out by means of glue or bolt-on linings certified in accordance with EASA / FAA. The basic requirements of CS25.603 §8.8 are confirmation by analysis and / or test that repair methods and techniques will restore the structure to airworthiness. The justification for the repair is carried out by analysis confirmed by tests. Repairs must meet the same requirements as the original composite structure. Representative damage dimensions are performed in a full-scale test (maximum allowable damage size). A full-size test piece is also included in the evidence base. Repairing composite parts requires a clean environment, for which humidity, dust and temperature control are critical. Therefore, various portable portable “clean room” designs developed by various companies specifically for the repair of aircraft structures were presented at the exhibition.

Keywords


polymer composite materials, structural and technological solutions for aircraft wings, review and analysis of Sampe exhibitions materials, structural repair of damage

References


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SAMPE CONFERENCE 2019 Available at: https://www.sampe-europe.org/conferences/sampe-conference-2019-nantes




DOI: https://doi.org/10.32620/oikit.2019.86.05

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