Composite material-stiffened panel and manufacturing method thereof
First Claim
1. A composite material-stiffened panel, comprising:
- a skin of fiber-reinforced resin composite material;
stiffeners with flange portions arranged in rows on one surface of said skin; and
a fiber-reinforced resin-composite material covering that covers at least some of said stiffeners and said covering being stitched on said skin along flange portions of said stiffeners in a longitudinal direction of said stiffeners and wherein said covering is only stitched to said skin in regions where there is covering contact with said skin.
2 Assignments
0 Petitions
Accused Products
Abstract
A composite material-stiffened panel has a skin obtained by molding a fiber-reinforced resin composite material into a flat skin, stiffeners arranged in rows on one surface of the skin, and a fiber-reinforced resin-composite material stitched on the skin covering the stiffeners. The composite material-stiffened panel can be manufactured as follows: A first fabric material is placed on a tool having a panel-shaped surface. Stiffeners are placed on the first fabric materials. A second fabric material is placed on the stiffeners to cover at least some of the stiffeners. The second fabric materials are reformed to match the shape of the stiffeners. The reformed second fabric material is stitched on the first fabric material along edges of the stiffeners. All the materials are covered with a bagging film for vacuum. Resin is infiltrated into the fabric materials by a RTM or a RFI method. The infiltrated resin is heated to be hardened.
-
Citations
23 Claims
-
1. A composite material-stiffened panel, comprising:
-
a skin of fiber-reinforced resin composite material; stiffeners with flange portions arranged in rows on one surface of said skin; and a fiber-reinforced resin-composite material covering that covers at least some of said stiffeners and said covering being stitched on said skin along flange portions of said stiffeners in a longitudinal direction of said stiffeners and wherein said covering is only stitched to said skin in regions where there is covering contact with said skin. - View Dependent Claims (2, 3, 4)
-
-
5. A composite material stiffened panel, comprising;
-
a first panel-shaped fabric material; stiffeners placed on said first fabric material; a second fabric material placed on said stiffeners so as to cover at least some of said stiffeners, said second fabric material being formed so as to match the shape of said stiffeners, said second fabric material being stitched on said first fabric material along edges of said stiffeners for facilitating positioning of said stiffeners; a hardened resin infiltrated into said fabric materials, and wherein said stiffeners placed on said first fabric are made of fiber-reinforced resin-composite material, said second fabric material being stitched on said first fabric material along edges of said stiffeners for facilitating positioning of said stiffeners; a hardened resin infiltrated into said fabric materials, and wherein said stiffeners placed on said first fabric material are of metal. - View Dependent Claims (6, 7, 8, 9, 10, 11)
-
-
12. A composite material stiffened panel, comprising;
-
a first panel-shaped fabric material; stiffeners placed on said first fabric material; a second fabric material placed on said stiffeners so as to cover at least some of said stiffeners, said second fabric material being formed so as to match the shape of said stiffeners, said second fabric material being stitched on said first fabric material along edges of said stiffeners for facilitating positioning of said stiffeners; a hardened resin infiltrated into said fabric materials, and wherein said stiffeners placed on said first fabric material have open cross-sections defining longitudinally extending hollow channels. - View Dependent Claims (13)
-
-
14. A composite material stiffened panel, comprising;
-
a first panel-shaped fabric material; stiffeners placed on said first fabric material; a second fabric material placed on said stiffeners so as to cover at least some of said stiffeners, said second fabric material being formed so as to match the shape of said stiffeners. - View Dependent Claims (15, 16, 17, 18)
-
-
19. A composite material-stiffened panel, comprising:
-
a skin of fiber-reinforced resin composite material; a plurality of longitudinally elongated stiffeners arranged in rows on said skin with each of said stiffeners having left and right side edges; a fiber-reinforced resin-composite covering that covers at least a portion of said stiffeners; a plurality of stitch lines which extend into the skin and said covering to join said covering to said skin, and said stitch lines being arranged in stiffener aligning stitch line pairs, with each of said pairs having a left stitch line extending longitudinally along and adjacent to the left side of a respective stiffener and a right stitch line extending longitudinally along and adjacent to the right side of that respective stiffener so as to align that respective stiffener between said left and right stitch lines, and said left stitch line of that respective stiffener being the closest stitch line to the left of the right stitch line for that respective stiffener. - View Dependent Claims (20, 21, 22, 23)
-
Specification