Composite material-stiffened panel and manufacturing method thereof

• US 20050003145A1
• Filed: 11/21/2003
• Published: 01/06/2005
• Est. Priority Date: 12/22/2000
• Status: Active Grant

• Current Assignee: Subaru Corp.
• Original Assignee: Atsushi Harada, Masahiro Noda, Shigeki Tanaka, Yasuhiro Toi
• Inventors: Tanaka, Shigeki, Harada, Atsushi, Noda, Masahiro, Toi, Yasuhiro
• Granted Patent: US 7,074,474 B2
• Time in Patent Office: Days
• US Class Current: 428/102
• CPC Class Codes: B29C 43/12 using bags surrounding the moulding material or using membranes contacting the moulding material
• CPC Class Codes: B29C 70/443 and impregnating by vacuum or injection
• CPC Class Codes: B64C 1/12 Construction or attachment of skin panels
• CPC Class Codes: Y02T 50/40 Weight reduction
• CPC Class Codes: Y10T 428/24033 including stitching and discrete fastener[s], coating or bond
• CPC Class Codes: Y10T 428/24174 including sheet or component perpendicular to plane of web or sheet
• CPC Class Codes: Y10T 428/24198 Channel-shaped edge component [e.g., binding, etc.]
• CPC Class Codes: Y10T 428/24661 Forming, or cooperating to form cells

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.

Claims

1. A composite material-stiffened panel, comprising:

a skin obtained by molding a fiber-reinforced resin composite material into a flat skin;

stiffeners arranged in rows on one surface of said skin; and

a fiber-reinforced resin-composite material stitched on said skin covering said stiffeners.

2. The composite material stiffened panel according to claim 1, further comprising ribs for connecting said stiffeners arranged in rows.

3-6. -6. (Deleted)