JPH09164619A - Fiber structure used in carbon composite material part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve the enhancement of the strength characteristics of a part and the degree of freedom of the shape of the part and the reduction of a manufacturing risk or cost. SOLUTION: A fiber structure 11 is separated into a simple shape part having a large area and a complicated shape part 13 such as a bent part or an uneven part and planar fabrics 14, 15 are laminated to the simple shape part 12 while fibers 16 in an in-plane direction are arranged (laminated) to the complicated shape part 13 between the planar fabrics 14, 15 and held between the planar fabrics 14, 15 to be laminated and the whole is integrally bonded by fibers 17 in a laminating direction (plate thickness) direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fiber structure used for a carbon / carbon composite material part applied to heat-resistant structural parts of aerospace equipment.

[0002]

2. Description of the Related Art Heat-resistant structural parts for aerospace equipment, such as a turbine disk of an air turbo ramjet engine and equipment around it, which has a high temperature, a brake disk of an aircraft, a nove cone or a leading edge of a space shuttle, etc. Carbon / carbon composite parts applied to parts generally employ the following two fiber structures.

Laminated Fiber Structure This is a layered fiber structure obtained by simply laminating a number of flat raw materials, which are called prepregs and impregnated with resin, into a pre-sinterable flat material on a molding jig. Three-dimensional woven fiber structure A three-dimensional woven fiber structure formed by weaving fibers into predetermined parts.

[0004]

The above-mentioned conventional fiber structures have the following problems when producing carbon / carbon composite material parts.

That is, in the laminated fiber structure, when a part of the carbon / carbon composite material part is in a bent portion or an uneven portion, a flat material itself obtained by impregnating a fiber or woven fabric called a prepreg with a resin. Since the molding is performed by utilizing the conformability (drapeability), the shape imparting property such as wrinkles occurring during shaping is poor, and the degree of freedom of the component shape is limited. In addition, when a carbon / carbon composite material part is manufactured by this laminated fiber structure, there is a possibility that delamination of the laminated material may occur at the bent portion and the uneven portion, which poses a large manufacturing risk. And, since the interlayer strength of the laminated material is extremely low, when applied as a structural member, it is necessary to take care not to transfer the load between the layers, the manufacturing is troublesome, and the application site is limited. .

On the other hand, in the three-dimensional woven fiber structure, the process of weaving the fiber into the required predetermined component shape is complicated, and the work takes a long time, which increases the manufacturing cost. In addition, the strength and rigidity in the in-plane direction decrease due to the reduction of the fiber ratio in the in-plane direction, the fiber damage in the in-plane direction given to the fiber arrangement in the thickness direction, and the like.

The present invention is intended to solve such a problem and is used for a carbon composite material part which is intended to improve the strength characteristics of the part and the degree of freedom of the part shape and to reduce the production risk and the production cost. It is intended to provide a fiber structure.

[0008]

The fiber structure used in the carbon composite material component of the present invention for achieving the above-mentioned object has a structure in which fibers in the in-plane direction arranged in layers with respect to the shape of the component and a planar shape are formed. It is characterized in that a laminate comprising the formed woven fabric is integrated by fibers arranged in the laminating direction.

Therefore, the in-plane direction and the laminating direction of the fiber array are applied to the complicated shape part such as the bent part and the uneven part, and the planar woven fabric is applied to the large area simple shape part.
In the manufacturing process, the part where delamination is likely to occur or the part where interlaminar strength is required to be improved has a three-dimensional fiber structure. On the other hand, the part where delamination and interlaminar strength are not particularly problematic because the in-plane strength property is important is made flat. By using the laminated fiber structure of the woven fabric, in the complicated shape part, the degree of freedom of the part shape is improved,
By preventing delamination during manufacturing, it is possible to reduce manufacturing risk and improve interlayer strength. In addition, in a simple shape portion, it is possible to easily give a shape, improve in-plane strength characteristics, and reduce manufacturing cost.

[0010]

Embodiments of the present invention will be described below.

The fiber structure used in the carbon composite part of the present invention forms in-plane fibers arranged in layers with respect to the shape of the part to be manufactured and also forms a woven fabric formed in a plane. The in-plane direction fibers and the planar woven fabric are laminated to form a laminated body of both, and the laminated body is integrally formed by the fibers arranged in the laminating direction.

That is, an array of fibers in the in-plane direction and fibers in the laminating direction is applied to a complicated shape portion such as a bent portion or an uneven portion in the shape of a component to be manufactured, and a flat shape is applied to a large area simple shape portion. Apply the fabric. Therefore, in the manufacturing process of parts, the part where delamination is likely to occur or the part where the interlaminar strength is required to be improved (complex shaped part) has a three-dimensional fiber structure. On the other hand, in-plane strength characteristics are important and delamination and interlaminar strength are important. The part (simple shape part) that does not cause any particular problem has a laminated fiber structure of a planar woven fabric.

Then, in the complicated shape portion, it is easy to give the shape of the component, the degree of freedom of the shape of the component is improved, delamination does not occur during the production, the reduction of the production risk is reduced, and the interlaminar strength is reduced. Can be improved. On the other hand, in the simple shape portion, it is easy to give the shape of the component, the manufacturing process is simple, the manufacturing can be performed in a short period of time, the manufacturing cost is reduced, and the in-plane strength characteristics are improved.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings.

<First Embodiment> FIG. 1 schematically shows a fiber structure used in a carbon composite material component according to a first embodiment of the present invention.

In the fiber structure used in the carbon composite material part of this embodiment, as shown in FIG. 1, a fiber structure 11 manufactured in conformity with the shape of the part to be manufactured has a large area simple shape part 12 and , And a complicated shape portion 13 such as a bent portion or an uneven portion. Then, flat fabrics 14 and 15 are laminated on the simple shape portion 12. On the other hand, in the complex-shaped portion 13, the planar fabrics 14, 15
The fibers 16 in the in-plane direction (specifically, a planar material in which the fibers are impregnated with resin) 16 are arranged (laminated) between them, and the fibers 16 are sandwiched by the planar fabrics 14 and 15 and laminated. , Are joined together by fibers 17 in the stacking (plate thickness) direction.

Therefore, in the manufacturing process of the fiber structure 11, the simple shape portion 12 such as the portion where the in-plane strength property is important and the interlaminar peeling and the interlaminar strength are not particularly a problem has a laminated fiber structure of a flat woven fabric, On the other hand, the complex-shaped portion 13 such as a portion where delamination is likely to occur or a portion where interlayer strength needs to be improved has a three-dimensional fiber structure. Then, the fiber structure 1
In the simple shape portion 12 of No. 1, the shape can be easily given, the manufacturing process is simple, the manufacturing can be performed in a short period, and the manufacturing cost is reduced. Then, the in-plane strength characteristics of the simple shape portion 12 are also improved. On the other hand, in the complex-shaped portion 13, the shape can be easily given, the degree of freedom of the shape of the component is improved, delamination does not occur during manufacturing, and the reduction of manufacturing risk is reduced. Then, the interlayer strength of the complex-shaped portion 13 can be improved.

<Second Embodiment> FIG. 2 schematically shows a fiber structure used in a carbon composite material part according to a second embodiment of the present invention.

In the fiber structure used for the carbon composite material part of this embodiment, as shown in FIG. 2, the fiber structure 21 manufactured in conformity with the shape of the part to be manufactured has a large area simple shape part 22 and , And a complicated shape portion 23 such as a bent portion or an uneven portion. Then, a flat fabric 24 is applied to the simple shape portion 22. On the other hand, in the complex-shaped portion 23, the fibers 26 in the in-plane direction are arranged (laminated) on one surface of the planar woven fabric 24, and the whole is joined together by the fibers 27 in the laminated (plate thickness) direction.

Therefore, in the manufacturing process of the fibrous structure 21, the simple shape portion 22 such as the portion where the in-plane strength characteristics are important and the interlaminar peeling and the interlaminar strength are not particularly problematic becomes a laminated fiber structure of a flat woven fabric, On the other hand, the complex-shaped portion 23 such as a portion where delamination is likely to occur or a portion where interlayer strength needs to be improved has a three-dimensional fiber structure. Then, the fiber structure 2
In the simple shape portion 22 of No. 1, the shape can be easily given, the manufacturing process is simple, the manufacturing can be performed in a short period of time, the manufacturing cost is reduced, and the in-plane strength characteristics are improved. on the other hand,
In the complex-shaped portion 23, it is easy to give a shape, the degree of freedom of the shape of the component is improved, delamination does not occur at the time of manufacturing, the reduction of manufacturing risk is reduced, and the interlayer strength can be improved. The planar woven fabric 24 is one layer, and the fiber structure 21 as a whole can be made thin.

<Third Embodiment> FIG. 3 schematically shows a fiber structure used in a carbon composite material part according to a third embodiment of the present invention.

In the fiber structure used in the carbon composite material part of this embodiment, as shown in FIG. 3, a fiber structure 31 manufactured in conformity with the shape of the part to be manufactured has a large area simple shape portion 32 and , And a complicated shape portion 33 such as a bent portion or an uneven portion. Then, a flat fabric 34 is applied to the simple shape portion 32. On the other hand, in the complex-shaped portion 33, fibers 35 and 36 in the in-plane direction are arranged (laminated) on both surfaces of the planar woven fabric 34, respectively, and the planar woven fabric 34 is sandwiched by the fibers 35 and 36 and laminated. Then, the whole is bonded together by the fibers 37 in the stacking (plate thickness) direction.

Therefore, in the manufacturing process of the fiber structure 31, the simple shape portion 32 such as a portion where in-plane strength characteristics are important and delamination and interlayer strength are not particularly problematic becomes a laminated fiber structure of a planar woven fabric, On the other hand, the complex shape portion 33 such as a portion where delamination is likely to occur or a portion where interlayer strength needs to be improved has a three-dimensional fiber structure. Then, the fiber structure 3
In the simple shape portion 32 of No. 1, the shape can be easily given, the manufacturing process is simple, the manufacturing can be performed in a short period of time, the manufacturing cost is reduced, and the in-plane strength characteristics of the simple shape portion 32 are improved. On the other hand, in the complicated shape portion 33, it is easy to give a shape, the degree of freedom of the shape of the component is improved, delamination does not occur at the time of manufacturing, the reduction of manufacturing risk is reduced, and the interlayer strength of the complicated shape portion 33 is reduced. It is possible to improve. The fibers 35 and 36 in the in-plane direction are two layers, and the in-plane strength and the interlayer strength of the fiber structure 31 as a whole can be further improved.

In each of the above-mentioned embodiments, the fibers in the in-plane direction and the planar woven fabric are arranged in one layer or two layers, but the method of putting the fibers is not limited to these, and the present invention is not limited thereto. In the case of the fiber structure, a laminated body in which fibers in the in-plane direction and planar woven fabrics are laminated may be integrated by fibers arranged in the lamination direction, and may be appropriately set according to the components to be manufactured. It's good.

[0025]

As described above in detail with reference to the examples, according to the fiber structure used in the carbon composite material component of the present invention, the fibers and the planes in the in-plane direction arranged in layers with respect to the component shape are provided. Since a laminated body composed of woven fabrics is integrated by the fibers arranged in the laminating direction, the fiber arrangement in the in-plane direction and the laminating direction is applied to the complicated shape part such as the bent part and the uneven part, and the large area of A flat woven fabric will be applied to the simple shape part, and the part where delamination is likely to occur or the part where interlayer strength needs to be improved will have a three-dimensional fiber structure, which will improve the flexibility of the shape of parts and While it is possible to reduce manufacturing risk and improve interlaminar strength by preventing delamination, in the area where in-plane strength characteristics are important and delamination and interlaminar strength are not a particular problem, a flat woven laminated fiber structure is used. Become, Easy shape imparting, improving in-plane strength properties, it is possible to reduce the manufacturing cost. as a result,
As a whole, it is possible to improve the strength characteristics of the component, improve the flexibility of the component shape, reduce the manufacturing risk, reduce the cost, and easily provide the shape.

[Brief description of the drawings]

FIG. 1 is a schematic view of a fiber structure used in a carbon composite material component according to a first embodiment of the present invention.

FIG. 2 is a schematic view of a fiber structure used in a carbon composite material component according to a second embodiment of the present invention.

FIG. 3 is a schematic view of a fiber structure used in a carbon composite material component according to a third embodiment of the present invention.

[Explanation of symbols]

 11,21,31 Fiber structure 12,22,32 Simple shape part 13,23,33 Complex shape part 14,15,24,34 Planar fabric 16,26,35,36 In-plane direction fiber 17,27 , 37 Fibers in laminated (thickness) direction

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Shigeru Nishiyama Shigeru Nishiyama 10 Oe-cho, Minato-ku, Nagoya, Aichi Mitsubishi Heavy Industries, Ltd. Nagoya Aerospace Systems Works (72) Inventor Masahiro Shinya Oe-cho, Minato-ku, Aichi Prefecture No. 10 Mitsubishi Heavy Industries Ltd. Nagoya Aerospace Systems Works

Claims (1)

[Claims] 1. A laminated body composed of fibers in an in-plane direction arranged in layers with respect to the shape of a component and a woven fabric formed in a plane is integrated by the fibers arranged in the laminating direction. Fiber structure used for carbon composite parts.