B - Operations – Transporting – 64 – C
Patent
B - Operations, Transporting
64
C
B64C 1/00 (2006.01) B29D 99/00 (2010.01) B64C 3/26 (2006.01)
Patent
CA 2459167
A laminated composite material structure, in the form of a load-bearing rib (1) of a wing of an aircraft, comprises an upper laminated portion (1a), which is angled with respect to a middle laminated portion (1c), and a curved corner portion (5a) being continuous with and interposed between the upper and middle portions. (The rib (1) has a curve that connects the upper and middle portions (1a, 1c), which are perpendicular or transverse to each other.) The corner portion (5a) is in the form of a kinked portion or joggle, that is, the portion (5a) includes two regions (11) of positive curvature (concave regions) and a region (12) of negative curvature (convex region) interposed therebetween, whereby the formation or propagation of delaminations or cracks at the bend (5a) between the middle and upper portions (1a, 1c), due to fuel pressure loading (2a) and low through-thickness strength, may be reduced.
La structure en matériau composite stratifiée de la nervure portante (1) de la voilure d'un aéronef comprend une partie stratifiée supérieure (1a), formant un angle par rapport à la partie stratifiée principale (1c), ainsi qu'une partie d'angle courbe (5a) qui relie de manière continue la partie supérieure et la partie médiane. La nervure (1) présente une courbure qui relie les parties supérieure et médiane (1a, 1c), lesquelles parties sont perpendiculaires ou transversales l'une par rapport à l'autre. La partie d'angle (5a) forme une zone déformée ou un joint et comporte deux courbures positives (11) (régions courbes) reliée par une région (12) de courbure négative (région convexe). On peut en outre réduire la formation ou la propagation du phénomène de délamination ou de fissuration, dues à la charge de pression carburant (2a) et à la faible résistance interlaminaire, au niveau de la courbure (5a) qui sépare les parties médiane et supérieure (1a, 1c),
Airbus Operations Limited
Bae Systems Plc
Fetherstonhaugh & Co.
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