JPS59133042A - Fiber reinforced composite laminated material and its manufacture - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a fiber-reinforced composite laminate and a method for producing the same.

A conventional fiber-reinforced composite laminate material (hereinafter abbreviated as composite laminate material) is a laminate material 3 in which reinforcing fibers 1 are contained in a matrix 2, as shown in FIG. (The drawings show orthogonal directions) or they were laminated in the same direction and cured by heating and pressurizing. In such a composite laminate material, the reinforcing fibers 1 can bear the load in the in-plane direction of each laminate material 3, but since the reinforcing fibers 1 do not pass through the thickness direction, the tensile load in that direction and the interlayer Shearing: When a rod or bolt hole is opened, one of the reinforcing fibers is cut, making it locally weak, and if cracking or crushing occurs due to load concentration, the damage progresses along the reinforcing fibers and between the layers, and eventually resulting in fatal destruction. Even with composite laminated materials in which reinforcing fibers are oriented in different directions, each laminated material is not bonded by reinforcing fibers, so its strength is dominated by the strength of the matrix.

The present invention aims to eliminate the above-mentioned drawbacks of conventional composite laminate materials, and its purpose is to dramatically improve the strength of each laminate as well as the bonding strength of the laminate materials, and to improve the strength of composite laminate materials. It has excellent properties that allow it to withstand tensile loads in the thickness direction and shear loads between layers, and it also resists holes for rivets and bolts. FIG. 2 shows an embodiment of the composite @layer material of the present invention. Examples of reinforcing fibers used in the present invention include various metal fibers, glass fibers, and carbon fibers.

Examples include inorganic fibers such as boron fibers, organic fibers such as aramint fibers (manufactured by DuPont, Kevlar ■), and heat-resistant synthetic fibers such as silicon carbide fibers and alumina fibers. These fibers can also be used as filaments, woven fabrics, felts made of short fibers, and the like.

Further, as the matrix, for example, epoxy resin,
Thermosetting resins such as polyester, polyimide, and phenolic resins; thermoplastic resins such as polyacetal, polycarbonate, and chelisulfon; inorganic materials such as carbon and glass;
Examples include metals such as pure aluminum and aluminum.

81 The method for producing the composite laminate of the present invention includes 1. A method of laminating the composite laminate (in case it is included), sewing the laminate with suture fibers in a state where the matrix is not hardened, and then heating and pressurizing the material to harden the composite.

Alternatively, it can be produced by impregnating only the reinforcing fibers into the entire IJ lux after sewing them in the thickness direction with suture fibers, and curing them by heating and pressing.

As for the suturing method using fibers, for example, fibers are provided in the thickness direction of the layer as shown in FIG. 2, fibers are provided in a circle around the hole as shown in FIG. 3, or as shown in FIG. They can be provided along the corners, or around the shape material as shown in FIG. 5, or as desired. This makes it possible to reinforce the area around the hole by providing suture fibers around the load. (6) Propagation of cracks and progression of crushing damage can be inhibited. Further, (4) excellent effects such as load transmission between laminated materials in different directions are smoothly transmitted by the suture fibers can be obtained.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional composite laminate, FIG. 2 is a perspective view of a composite laminate showing an embodiment of the present invention, and FIGS. 3, 4, and 5 are composite laminates of the present invention. This is an example of suturing in. 1: Reinforcing fiber, 2: Matrix, 3: Laminated material, 4: Suture fiber, 5: Hole. Patent applicant Nagatake, Aerospace Technology Research Institute, Science and Technology Agency
1) Shuncha 1 Kuchi No. 21 ￥l Tei 3) Blade No. 4 Circle No. 1 24

Claims (1)

[Scope of Claim] A fiber-reinforced composite laminate comprising 12 or more fiber-reinforced laminates, in which fibers are passed through the composite laminate in the thickness direction and the laminates are sewn together. 2. A fiber-reinforced composite characterized in that, before the matrix of the laminate of two or more fiber-reinforced laminate materials is cured, fibers are passed through the laminate in the thickness direction of the laminate and the laminate is sutured, and then the laminate is heated and pressurized to form a cured composite. Manufacturing method for laminated materials.