Rod for supporting components in a fuselage cell structure...

B - Operations – Transporting – 64 – C

Patent

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Details

B64C 1/06 (2006.01)

Patent

CA 2735078

The invention relates to a rod 15-18, 19, 25 for supporting components in a fuselage cell structure 1, in particular produced with fibre-reinforced composite materials, of an aircraft, in particular for supporting at least one floor frame 4 on at least one annular former 2 and/or at least one further component of the fuselage cell structure 1. In accordance with the invention the rod 15-18, 19, 25 is formed, at least in portions, with a metal foam (20, 26), in particular for the absorption of crash loads. The metal foam 20, 26 can transform, irrespective of its inherent weight, the high mechanical loads produced in the event of an accident into work of plastic deformation at the microcavities within the metal foam 20, 26. A first variant of the rod 19 is almost completely formed by a metal foam 26, whereas a second embodiment comprises merely a core 24 made of the metal foam 26 with a relatively small diameter, which core is surrounded coaxially by a support casing 27 and an outer sleeve 28.

L'invention concerne une barre (15-18, 19, 25) destinée au support de composants d'une structure cellulaire (1) du fuselage d'un avion, notamment réalisée dans un matériau de matière plastique renforcé par des fibres, en particulier destinée au support d'au moins une plate-forme plancher (4) sur au moins une membrure annulaire (2) et/ou au moins un autre composant de la structure cellulaire (1) du fuselage. Selon l'invention, la barre (15-18, 19, 25) est réalisée au moins en partie dans une mousse métallique (20, 26), notamment aux fins d'absorption de charges de crash. La mousse métallique (20, 26) peut, quel que soit son faible poids, transformer les charges mécaniques élevées, se produisant en cas d'accident, en déformations plastiques appliquées aux microcavités présentes dans la mousse métallique (20, 26). Selon une première variante d'exécution, la barre (19) est presque entièrement réalisée en mousse métallique (26) tandis que selon une deuxième variante d'exécution, la barre présente seulement une âme (24) en mousse métallique (26) d'un diamètre relativement faible, ladite âme étant entourée de manière coaxiale d'une enveloppe support (27) et d'une gaine externe (28).

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