Shaped composite stringers and methods of making
First Claim
Patent Images
1. A stiffened skin panel of an aircraft comprising:
- a composite aircraft skin panel; and
a composite stringer consolidated with the aircraft skin panel, the stringer comprising a first stringer side and a second stringer side, wherein the first stringer side extends from a stringer top through a first stringer leg and a second stringer side extends from the stringer top through a second stringer leg, the first stringer side and second stringer side each extending in a continuous curve from the stringer top through a respective stringer leg, and wherein the curve of each stringer side is characterized by at least one inflection point such that the curve of each stringer side is further characterized by at least a first convex section and at least a first concave section.
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Abstract
A stiffened skin panel of an aircraft that includes an aircraft skin panel of composite material and a composite stringer consolidated with the aircraft skin panel. The stringer has a pair of stringer sides, each extending from a stringer top to a stringer leg. The stringer sides may each extend through a wide radius, smooth continuous curve to a stringer leg. The wide radius, smooth continuous curve may be proximate the base of the stringer side in a region where the stringer side transitions to the stringer leg.
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Citations
17 Claims
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1. A stiffened skin panel of an aircraft comprising:
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a composite aircraft skin panel; and a composite stringer consolidated with the aircraft skin panel, the stringer comprising a first stringer side and a second stringer side, wherein the first stringer side extends from a stringer top through a first stringer leg and a second stringer side extends from the stringer top through a second stringer leg, the first stringer side and second stringer side each extending in a continuous curve from the stringer top through a respective stringer leg, and wherein the curve of each stringer side is characterized by at least one inflection point such that the curve of each stringer side is further characterized by at least a first convex section and at least a first concave section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A stiffened panel comprising:
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a panel comprising composite material; a stringer consolidated with the panel, the stringer comprising composite material, the stringer comprising a first stringer side and a second stringer side, wherein the first stringer side extends from a stringer top in a smooth continuous curve through a first stringer leg and the second stringer side extends from the stringer top in a smooth continuous curve through a second stringer leg; wherein the curve of each stringer side is characterized by at least one inflection point such that the curve of each stringer side is further characterized by at least a first convex section and at least a first concave section; and an attachment zone comprising a portion of the stringer and a portion of the panel comprising a stringer point of attachment to the panel, the attachment zone also comprising cured resin. - View Dependent Claims (15, 16, 17)
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Specification