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US 7,682,682 B2Granted
Stiffener stop with staggered slopes and panel fitted with such a stop
AssigneeAirbus France
InventorsJean-Luc Leon-Dufour, Bruno Sarpy
Life of this patent
Estimating the term…
Abstract
The object of this invention is a stiffener stop in particular for a primary structural panel of the “skin+stiffener” type for aircraft, said stop consisting of an initial slope connected to the normal height of the stiffener and a final slope, wherein at least one interval having a slope nearly equal to zero with respect to the plane of the base skin in the stop area is inserted between the two aforesaid slopes.
Claims10
A stiffened composite aircraft panel with at least one stiffener secured thereto, the stiffener comprising:
- a longitudinal core having a first longitudinal edge directly secured to an outer base skin of the composite aircraft panel substantially along an entirety of the first longitudinal edge, an opposed second edge having a height with respect to the first edge, and opposed side surfaces extending between said first edge and said second edge substantially along an entirety of the core, said core having two opposed longitudinal end portions
- wherein the longitudinal end portions form longitudinal stiffener stops of the stiffener, wherein at least one of said longitudinal stiffener stops comprises first and second slopes separated by a plateau, said first slope starting at the second edge at a first height and descending to a first intermediate point on the second edge at a second height less than the first height, the plateau extending from the first intermediate point to a second intermediate point on the second edge, and the second slope descending from the second intermediate point to the base skin.
An aircraft assembly comprising:
- an aircraft having at least one stiffened composite panel with at least one stiffener secured thereto, the stiffener comprising:
- a longitudinal core having a first longitudinal edge directly secured to an outer base skin of the composite panel substantially along an entirety of the first longitudinal edge, an opposed second edge having a height with respect to the first edge, and opposed side surfaces extending between said first edge and said second edge substantially along an entirety of the core, said core having two opposed longitudinal end portions
- wherein the longitudinal end portions form longitudinal stiffener stops of the stiffener, wherein at least one of said longitudinal stiffener stops comprises first and second slopes separated by a plateau, said first slope starting at the second edge at a first height and descending to a first intermediate point on the second edge at a second height less than the first height, the plateau extending from the first intermediate point to a second intermediate point on the second edge, and the second slope descending from the second intermediate point to the base skin.
Dependencies are inferred from the claim text.