Rib structural system and method of manufacturing the rib structural system

• US 20050163414A1
• Filed: 10/08/2004
• Published: 07/28/2005
• Est. Priority Date: 01/26/2004
• Status: Abandoned Application

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Hahn, Steven, Ozaki, Tsuyoshi, Takeya, Hajime
• Application Number:
  US10/960,062
• Publication Number:
  US 20050163414A1
• Time in Patent Office: Days
• US Class Current: 385/12
• CPC Class Codes: G01M 11/086 Details about the embedment of the optical fiber within the DUT
• CPC Class Codes: G01M 5/0016 of aircraft wings or blades
• CPC Class Codes: G01M 5/0033 by determining damage, crack or wear
• CPC Class Codes: G01M 5/0091 by using electromagnetic excitation or detection
• CPC Class Codes: G02B 6/29319 With a cascade of diffractive elements or of diffraction operations forming interferometer by splitting and recombining G02B6/29347 - G02B6/29358

Abstract

In a method of manufacturing a rib structural system, tape-shaped prepregs, each made of a fiber reinforced composite material into which a resin is impregnated, are laminated to form ribs in the form of a grid, while an optical fiber including Fiber Bragg Grating members at predetermined locations is layered in the ribs. The Fiber Bragg Grating members are arranged at intermediate locations dependent upon their reflection wavelengths, each of the intermediate locations being substantially midway between two adjacent intersections in of two or more ribs.

Claims

1. A rib structural system comprising:

a grid including a plurality of intersecting ribs; and

an optical fiber including a plurality of Fiber Bragg Grating members having at least two reflection wavelengths, each of said plurality of Fiber Bragg Grating members being located substantially midway between adjacent intersections of said grid where at least two of said plurality of ribs intersect.

2. The rib structural system according to claim 1, wherein each of said plurality of ribs includes a laminated member that is a stack of layers, each layer including a fiber reinforced composite material, a part of said optical fiber in which said plurality of Fiber Bragg Grating members are located being layered in said laminated member.

3. The rib structural system according to claim 1, wherein said rib structural system has a three-dimensional structure.

4. A method of manufacturing a rib structural system, comprising:

laminating first prepregs, each first prepreg including a tape-shaped fiber reinforced composite material and pressurizing said first prepregs to form a lower layer portion of said rib structural system;

placing an optical fiber including a plurality of Fiber Bragg Grating members on said lower layer portion so that said plurality of Fiber Bragg Grating members are arranged at locations dependent upon their reflection wavelengths; and

laminating second prepregs each second prepreg including a tape-shaped fiber reinforced composite material, on said optical fiber and pressurizing said prepregs.

5. A method of manufacturing a rib structural system, comprising:

impregnating a fiber reinforced composite material with a resin and winding said fiber reinforced composite material around a forming block to form a lower layer portion of said rib structural system;

placing an optical fiber including a plurality of Fiber Bragg Grating members on said lower layer portion so that said plurality of Fiber Bragg Grating members are arranged at locations dependent upon their reflection wavelengths; and

laminating said fiber reinforced composite material into which the resin is impregnated on said optical fiber in which said plurality of Fiber Bragg Grating members are arranged, and winding said fiber reinforced composite material around said forming block.