Lightweight and reliable metal–composite joints based on harmonization of strength properties of joined parts
| Autor: | Alexander Shanygin, Andrey Chernov, Ivan Mareskin, Ivan Kondakov, Danil Fomin |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Composite number Aerospace Engineering Harmonization 02 engineering and technology Structural engineering 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Composite structure Bolted joint Key (cryptography) 0210 nano-technology business |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering. 232:2663-2672 |
| ISSN: | 2041-3025 0954-4100 |
| DOI: | 10.1177/0954410018778797 |
| Popis: | One of the key problems of designing composite primary aircraft structures is the problem of development of lightweight and reliable joints for such structures. For conventional bolted joints used for connection of laminated composite primary structure elements, the loads are transferred via the contact of metallic and composite parts having considerably different strength and stiffness parameters. As the local strength properties of composites are defined by polymer resins, having several times less strength as compared to the metallic alloys, the maximal load that can be transferred via the joint is limited by the properties of resins. As a consequence, the metallic parts of such joints are loaded to a very low extent, that causes low weight efficiency. In the presented paper, the approach to development of metal–composite joints based on the principle of harmonization is proposed. The harmonization principle is to minimize the disbalance of strength properties of metallic and composite parts in the local zones of contact. This principle can be realized by two ways: either by removing the resin from the zone of contact to increase local stiffness of composite part (“stiff” joint concept) or by creation of metallic part with porous structure to decrease local stiffness of the metallic part (“soft” joint concept). In this paper, the evaluation of both concepts is given, based on numerical and experimental investigations carried out in this work. |
| Databáze: | OpenAIRE |
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