Composite material molding jig, composite material molding method, ultrasonic test system, ultrasonic test method and aircraft structural object

• US 10,416,121 B2
• Filed: 03/07/2017
• Issued: 09/17/2019
• Est. Priority Date: 03/24/2016
• Status: Active Grant

• Current Assignee: Subaru Corp.
• Original Assignee: Subaru Corp.
• Inventors: Takahashi, Kohei
• Primary Examiner(s): Saint Surin, Jacques M
• Application Number:
  US15/451,792
• Publication Number:
  US 20170276648A1
• Time in Patent Office: 924 Days
• Field of Search: 73655
• CPC Class Codes: B29C 2033/0094 Means for masking a part of the moulding surface
• CPC Class Codes: B29C 2043/5808 pressure or compressing force
• CPC Class Codes: B29C 33/42 characterised by the shape of the moulding surface, e.g. ribs or grooves
• CPC Class Codes: B29C 43/021 characterised by the shape of the surface
• CPC Class Codes: B29C 43/58 Measuring, controlling or regulating for bank adjustment in calendering B29C43/245
• CPC Class Codes: B29C 59/022 characterised by the disposition or the configuration, e.g. dimensions, of the embossments or the shaping tools therefor
• CPC Class Codes: B29C 59/026 of layered or coated substantially flat surfaces
• CPC Class Codes: B29C 65/4855 characterised by their physical properties, e.g. being electrically-conductive
• CPC Class Codes: B29C 70/34 and shaping or impregnating by compression , i.e. combined with compressing after the lay-up operation
• CPC Class Codes: B29C 70/42 for producing articles of definite length, i.e. discrete articles
• CPC Class Codes: B29K 2105/06 containing reinforcements, fillers or inserts
• CPC Class Codes: B29K 2995/0001 having particular acoustical properties
• CPC Class Codes: B29L 2031/3076 Aircrafts blades, propellers B29L2031/08
• CPC Class Codes: B29L 2031/3082 Fuselages
• CPC Class Codes: B32B 2307/10 having particular acoustical properties
• CPC Class Codes: B32B 2605/18 Aircraft blades, propellers B32B2603/00
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: B32B 37/12 characterised by using adhesives
• CPC Class Codes: B32B 5/10 characterised by a fibrous or filamentary layer reinforced with filaments
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B64C 3/18 : Spars; Ribs; Stringers
• CPC Class Codes: G01N 29/043 : in the interior, e.g. by shear waves
• CPC Class Codes: G01N 29/2418 : using optoacoustic interaction with the material, e.g. laser radiation, photoacoustics photoacoustic cells G01N21/1702; measuring characteristics of vibrations by using radiation-sensitive means G01H9/00; acousto-optical conversion techniques for short-range imaging G01S15/8965; sound-producing devices using laser bundle G10K15/046
• CPC Class Codes: Y02T 50/40 : Weight reduction

Abstract

According to one implementation, a composite material molding jig includes a rigid portion and a convex portion for forming a groove for inserting an optical fiber sensor. The rigid portion has a surface for laminating prepreg sheets. The convex portion is formed in a surface side of the rigid portion. Further, according to one implementation, a composite material molding method is a method for molding a composite material, on which the groove for inserting the optical fiber sensor has been formed, by heating and curing a laminated body of the prepreg sheets laminated on the above-mentioned composite material molding jig.

Claims

1. A composite material molding method, comprising:

placing one or more plies of prepreg sheets on a molding jig, the molding jig comprising a rigid portion having a surface for laminating prepreg sheets, and a convex portion for forming a groove for insertion of an optical fiber sensor, the convex portion being formed in a surface side of the rigid portion, and

heating and curing a laminated body of the prepreg sheets laminated on the molding jig, the groove for inserting the optical fiber sensor having been formed in the one or more prepreg sheets, wherein

each of the one or more prepreg sheets is, prior to curing, a glass fiber reinforced plastic or a carbon fiber reinforced plastic, and

placing one or more plies of prepreg sheets on the molding jig comprises disposing one or more plies of prepreg sheets on each of both sides of the convex portion for forming the groove, with a length direction of fibers of the disposed one or more plies of prepreg sheets being a length direction of the convex portion.

2. The composite material molding method according to claim 1,

wherein the convex portion has a height of one ply of a prepreg sheet.

3. The composite material molding method according to claim 1,

wherein a height of the convex portion and a width of a cross section of the convex portion are not less than 125 μ

m and not more than 150 μ

m, respectively.

4. The composite material molding method according to claim 1,

wherein the convex portion has a length not more than 10 m in a longitudinal direction of the convex portion.

5. The composite material molding method according to claim 1,

wherein the groove has a depth corresponding to one ply of a prepreg sheet.

6. The composite material molding method according to claim 1, further comprising:

inserting an optical fiber sensor into the groove formed in the composite material and applying an adhesive between the groove and the optical fiber sensor; and

hardening the adhesive to produce a composite material integrated with the optical fiber sensor.

7. The composite material molding method according to claim 1,

wherein at least one of both end portions of the groove in a length direction is made to have a shape of which a depth and a width of a cross section gradually decrease.

8. A composite material molding method comprising:

producing a laminated body of prepregs, which has a groove for inserting an optical fiber sensor, each of the prepregs, prior to curing, being a glass fiber reinforced plastic or a carbon fiber reinforced plastic; and

molding a composite material with the prepregs by curing the laminated body of the prepregs, the prepregs having the groove,

wherein the groove is formed without cutting fibers of the prepregs, a length direction of the groove being a length direction of the fibers, the groove being formed by disposing one or more plies of prepreg sheets on each of both sides of a convex portion for forming the groove, the convex portion being formed on a surface of a rigid composite material molding jig, a length direction of fibers of the disposed one or more plies of prepreg sheets being a length direction of the convex portion.

9. The composite material molding method according to claim 8,

wherein the groove has a depth corresponding to one ply of a prepreg sheet.

10. The composite material molding method according to claim 8, further comprising:

inserting an optical fiber sensor into the groove formed in the composite material and applying an adhesive between the groove and the optical fiber sensor; and

hardening the adhesive to produce a composite material integrated with the optical fiber sensor.

11. The composite material molding method according to claim 8,

wherein at least one of both end portions of the groove in a length direction is made to have a shape of which a depth and a width of a cross section gradually decrease.