Lightweight structure particularly for aircraft

Details Lightweight structure particularly for aircraft Lightweight structure particularly for aircraft

B - Operations, Transporting

64

C

B64C 1/00 (2006.01) B32B 3/08 (2006.01) B32B 3/14 (2006.01) B32B 15/08 (2006.01)

Patent

CA 2473346

An outer skin of an aircraft body is supported by a frame of longitudinal stringers and circumferential ribs or frame elements interconnecting the stringers. Additionally, the outer skin is strengthened by a reinforcing strip formation adhesively bonded to the inwardly facing surface of the outer skin between the ribs and stringers. The reinforcing strips are made of a material that is damage tolerant, for example high strength aluminum alloys and fiber composite materials are suitable for making the reinforcing strip formation. The reinforcing strips of the strip formation may extend in parallel to the stringers and/or the ribs and preferably form a lattice work. The reinforcing strips need not cross each other at right angles but should cross a crack propagation direction in the outer skin.

Un revêtement extérieur pour aéronefs est supporté par une structure constituée de lisses longitudinales et de nervures circulaires, ou éléments de structures qui sont interreliées aux lisses. De plus, le revêtement extérieur est renforcé par une formation de bandes de renfort qui sont liées adhésivement à la surface orientée vers l'intérieur du revêtement extérieur entre les nervures et les lisses. Les bandes de renfort sont fabriquées d'un matériau qui tolère des avaries, par exemple des alliages d'aluminium à haute résistance et des matériaux composites en fibres sont indiqués pour la fabrication des bandes de renfort. Ces bandes en formation peuvent longer parallèlement les lisses et/ou les nervures et, de préférence, former un treillis. Il n'est pas nécessaire que les de renfort s'entrecroisent à des angles droits, mais devraient croiser une direction de propagation de fissure sur le revêtement extérieur.

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