STIFFENING ELEMENT AND A METHOD FOR MANUFACTURING OF A STIFFENING ELEMEMT
First Claim
1. A method for manufacturing of a stiffening element of composite material, said stiffening element being provided for attachment to a curved shell surface, said stiffening element comprising a web and at least one flange, the outer surface of which has a radius of curvature corresponding with the curvature of said curved shell surface, the method comprising the steps of:
- providing a substantial flat blank of composite material; and
folding said blank along a first folding line, the curvature of which is defined by an imaginary three-dimensional intersection line being derived from the radius (R) of curvature of the curved shell surface.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention relates to a method for manufacturing of a stiffening element (1, 1′, 1″, 2) of composite material, which stiffening element is provided for attachment to a curved shell surface (9), said stiffening element (1, 1′, 1″, 2) comprises a web (3) and at least one flange (5), the outer surface (11) of which has a radius (R) of curvature corresponding with the curvature of said curved shell surface (9)
The method comprises the following steps of: providing a substantial flat blank (19) of composite material; and folding said blank (19) along a first folding line (13), the curvature of which is defined by an imaginary three-dimensional intersection line (115) being derived from the radius (R) of curvature of the curved shell surface (9).
40 Citations
18 Claims
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1. A method for manufacturing of a stiffening element of composite material, said stiffening element being provided for attachment to a curved shell surface, said stiffening element comprising a web and at least one flange, the outer surface of which has a radius of curvature corresponding with the curvature of said curved shell surface, the method comprising the steps of:
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providing a substantial flat blank of composite material; and
folding said blank along a first folding line, the curvature of which is defined by an imaginary three-dimensional intersection line being derived from the radius (R) of curvature of the curved shell surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A stiffening element of composite material, wherein said element is manufactured by
providing a substantial flat blank of composite material; - and
folding said blank along a first folding line, the curvature of which is defined by an imaginary three-dimensional intersection line being derived from the radius (R) of curvature of the curved shell surface. - View Dependent Claims (12, 13)
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14. A stiffening element structure, wherein a first stiffening element is arranged near a second stiffening element, a bracing means is connecting the stiffening elements, said stiffening elements are manufactured by
providing a substantial flat blank of composite material; - and
folding said blank along a first folding line, the curvature of which is defined by an imaginary three-dimensional intersection line being derived from the radius (R) of curvature of the curved shell surface.
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15. A curved shell panel comprising a curved shell inner surface, at least two stiffening elements manufactured by providing a substantial flat blank of composite material;
- and folding said blank along a first folding line, the curvature of which is defined by an imaginary three-dimensional intersection line being derived from the radius (R) of curvature of the curved shell surface, being attached to said curved shell inner surface.
- View Dependent Claims (16)
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17. A method for manufacturing of a curved shell panel comprising at least two stiffening elements of composite material being attached to a curved shell surface of the panel, the method comprises the following steps of:
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providing a curved shell panel blank;
providing a substantial flat blank of composite material;
folding said blank folding said blank along a first folding line, the curvature of which is defined by an imaginary three-dimensional intersection line being derived from the radius (R) of curvature of the curved shell surface; and
attaching the at least two stiffening elements to the curved shell surface of the shell panel blank. - View Dependent Claims (18)
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Specification