JP2013059949A - Composite material structural body, and method for producing the same - Google Patents

Composite material structural body, and method for producing the same Download PDF

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JP2013059949A
JP2013059949A JP2011200920A JP2011200920A JP2013059949A JP 2013059949 A JP2013059949 A JP 2013059949A JP 2011200920 A JP2011200920 A JP 2011200920A JP 2011200920 A JP2011200920 A JP 2011200920A JP 2013059949 A JP2013059949 A JP 2013059949A
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skin
fiber
resin
composite material
core material
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Ryohei Tsuji
良平 辻
Ryuta Kamiya
隆太 神谷
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Toyota Industries Corp
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Toyota Industries Corp
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Priority to JP2011200920A priority Critical patent/JP2013059949A/en
Priority to PCT/JP2012/071678 priority patent/WO2013038900A1/en
Publication of JP2013059949A publication Critical patent/JP2013059949A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/24—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least three directions forming a three dimensional structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/001—Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings
    • B29D99/0021—Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings provided with plain or filled structures, e.g. cores, placed between two or more plates or sheets, e.g. in a matrix

Abstract

PROBLEM TO BE SOLVED: To provide a composite material structural body capable of suppressing growth of a crack generated between respective skin materials, and a method for producing the same.SOLUTION: The composite structure 11 includes a sandwich structure interposing a core material 12 between the skin materials 13 of a fiber-reinforced resin. In the composite structure 11, the core material 12 is provided in a part of both the skin materials 13 and at least in a part around the core material 12, the skin materials 13 are bonded by the binding member 16 of the fiber-reinforced resin.

Description

本発明は、繊維強化樹脂のスキン材同士の間にコア材を挟んだサンドイッチ構造を有する複合材料構造体及びその製造方法に関する。   The present invention relates to a composite material structure having a sandwich structure in which a core material is sandwiched between fiber reinforced resin skin materials and a method for manufacturing the same.

軽量で高強度の素材として、サンドイッチ構造の構造体が知られている（例えば、特許文献１参照）。特許文献１の複合パネルは、複合積層材料製の第１の層（スキン材）と第２の層（スキン材）との間の一部に、ハニカム構造体製のコア部分（コア材）が挟まれてなる。コア部分と第１及び第２の層とは、マトリックス樹脂によって硬化されるとともに、第１の層と第２の層において、コア部分を挟まない部分も互いに積層してマトリックス樹脂によって硬化して一体化されている。   A sandwich structure is known as a lightweight and high-strength material (see, for example, Patent Document 1). In the composite panel of Patent Document 1, a core portion (core material) made of a honeycomb structure is provided between a first layer (skin material) and a second layer (skin material) made of a composite laminate material. It is sandwiched. The core portion and the first and second layers are cured by the matrix resin, and the portions of the first layer and the second layer that do not sandwich the core portion are also laminated to each other and cured by the matrix resin. It has become.

特開２００９−１４９０７２号公報JP 2009-149072 A

ところが、第１の層と第２の層のコア部分を挟まない部分において、特にコア部分に直近の部位には、コア部分と、第１及び第２の層との熱膨張係数の違いによる熱応力や、曲げ、衝撃等の外部荷重による応力集中が発生する。すると、硬化された第１の層と第２の層との間（層間）の樹脂に亀裂が生じてしまう場合があり、さらに、熱応力や外部荷重による応力集中が発生し続けると、亀裂がコア部分から離れる方向に向けて進展し、第１の層と第２の層とが剥離してしまう虞がある。   However, in a portion where the core portions of the first layer and the second layer are not sandwiched, particularly in a portion closest to the core portion, heat due to a difference in thermal expansion coefficient between the core portion and the first and second layers. Stress concentration occurs due to stress and external loads such as bending and impact. Then, cracks may occur in the resin between the cured first layer and the second layer (interlayer). Furthermore, if stress concentration due to thermal stress or external load continues to occur, the cracks may occur. There is a possibility that the first layer and the second layer are peeled off due to progress in a direction away from the core portion.

本発明は、スキン材同士の間に発生した亀裂の進展を抑制することができる複合材料構造体及びその製造方法を提供することにある。   An object of the present invention is to provide a composite material structure capable of suppressing the progress of cracks generated between skin materials and a method for manufacturing the same.

上記問題点を解決するために、請求項１に記載の発明は、繊維強化樹脂のスキン材同士の間にコア材を挟んだサンドイッチ構造を有する複合材料構造体において、前記コア材は両スキン材の一部に設けられ、前記コア材周りの少なくとも一部において、前記スキン材同士を繊維強化樹脂の結合部材で結合した。   In order to solve the above problems, the invention according to claim 1 is a composite material structure having a sandwich structure in which a core material is sandwiched between fiber reinforced resin skin materials, wherein the core material is both skin materials. The skin material is bonded to each other by a fiber reinforced resin bonding member at least at a part around the core material.

また、請求項４に記載の発明は、繊維強化樹脂のスキン材同士の間にコア材を挟んだサンドイッチ構造を有する複合材料構造体の製造方法であって、前記スキン材の材料であるスキン用繊維材料で前記コア材を挟み、前記スキン用繊維材料同士を前記コア材周りの少なくとも一部において結合部材用繊維材料により結合し、前記スキン用繊維材料及び結合部材用繊維材料に樹脂を含浸硬化させて該スキン用繊維材料及び結合部材用繊維材料を繊維強化樹脂とする。   The invention according to claim 4 is a method for producing a composite material structure having a sandwich structure in which a core material is sandwiched between skin materials made of fiber reinforced resin, and is for a skin that is a material of the skin material. The core material is sandwiched between fiber materials, and the skin fiber materials are bonded to each other at least part of the periphery of the core material by a bonding member fiber material, and the skin fiber material and the bonding member fiber material are impregnated and cured. Thus, the fiber material for skin and the fiber material for bonding member are used as fiber reinforced resin.

これによれば、スキン材同士は樹脂による硬化に加え結合部材によって機械的に結合された状態となる。このため、コア材とスキン材との熱膨張係数の違いによる熱応力や、外部荷重による応力集中がコア材周りに発生し、そのコア材周りで万一、スキン材同士の間に両者を剥離させる亀裂が生じても、結合部材による結合によってスキン材同士の結合が維持され、スキン材が剥離することが抑制される。したがって、結合部材によってスキン材同士を結合したことにより、スキン材同士の間に発生した亀裂が、コア材から離れる方向に向けて進展することが抑制される。   According to this, the skin materials are in a state of being mechanically coupled by the coupling member in addition to curing by the resin. For this reason, thermal stress due to the difference in thermal expansion coefficient between the core material and skin material and stress concentration due to external load occur around the core material. Even if a crack to be generated occurs, the bonding between the skin materials is maintained by the bonding by the coupling member, and the skin material is prevented from peeling off. Therefore, by joining the skin materials with the joining member, it is possible to prevent the cracks generated between the skin materials from progressing in the direction away from the core material.

また、前記スキン材同士の前記コア材が設けられていない部分の全体を前記結合部材で結合してもよい。
これによれば、スキン材同士のコア材が設けられていない部分のどの位置で亀裂が生じても、結合部材による結合によって亀裂が進展しにくくなる。 Moreover, you may couple | bond the whole part in which the said core material of the said skin materials is not provided with the said coupling member.
According to this, even if a crack occurs at any position of the portion where the core material between the skin materials is not provided, the crack is difficult to progress due to the coupling by the coupling member.

また、前記結合部材は、前記スキン材同士を縫合する糸条繊維に樹脂を含浸させてなる。これによれば、糸条繊維によりスキン材同士が縫合されるため、糸条繊維に樹脂を含浸させて繊維強化樹脂製の結合部材としても、その結合部材がスキン材から抜けにくくなり、スキン材の結合状態が維持されやすい。   In addition, the coupling member is formed by impregnating a resin into a yarn fiber that stitches the skin materials together. According to this, since the skin materials are stitched together by the yarn fibers, even if the yarn fibers are impregnated with a resin and used as a fiber reinforced resin coupling member, the coupling member is difficult to come off from the skin material. It is easy to maintain the combined state.

本発明によれば、スキン材同士の間に発生した亀裂の進展を抑制することができる。   According to the present invention, it is possible to suppress the progress of cracks generated between skin materials.

（ａ）は実施形態の複合材料構造体を示す断面図、（ｂ）は実施形態の複合材料構造体を示す平面図。(A) is sectional drawing which shows the composite material structure of embodiment, (b) is a top view which shows the composite material structure of embodiment. 複合材料構造体の別例を示す断面図。Sectional drawing which shows another example of a composite material structure. 複合材料構造体の別例を示す断面図。Sectional drawing which shows another example of a composite material structure. （ａ）及び（ｂ）は結合部材の配置の別例を示す平面図。(A) And (b) is a top view which shows another example of arrangement | positioning of a coupling member.

以下、本発明を具体化した一実施形態を図１にしたがって説明する。
図１（ａ）に示すように、複合材料構造体１１はコア材１２全体が、上下一対のスキン材１３それぞれの一部で挟持されつつ包囲されたサンドイッチ構造を有する。なお、コア材１２は、同一形状のセルの集合体であるハニカム構造体が用いられ、セルとしては、六角形、ＯＸ、フレックス、バイセクト、フェザーセルのいずれの形状であってもよい。また、コア材１２は、アルミニウムや樹脂で硬化させた紙等により形成されている。 Hereinafter, an embodiment embodying the present invention will be described with reference to FIG.
As shown in FIG. 1A, the composite material structure 11 has a sandwich structure in which the entire core material 12 is surrounded by a part of each of the pair of upper and lower skin materials 13. The core material 12 uses a honeycomb structure that is an aggregate of cells having the same shape, and the cells may have any shape of hexagon, OX, flex, bisecto, and feather cell. The core material 12 is formed of paper or the like cured with aluminum or resin.

スキン材１３は、炭素繊維、ガラス繊維、セラミック繊維等の無機繊維あるいは、アラミド繊維、ポリ−ｐ−フェニレンベンゾビスオキサゾール繊維、超高分子量ポリエチレン繊維等の高強度、高弾性率の有機繊維等で形成されたスキン用繊維織物（スキン用繊維材料）に樹脂を含浸硬化させて形成されている。スキン用繊維織物は、例えば繊維がＸ，Ｙ方向に配列された平織りの織物が使用され、複合材料構造体１１の目的とする物性に応じて１枚又は複数枚の所定枚数使用される。複数枚使用する場合、疑似等方積層材を構成するように、一部の織物を繊維の配列方向が複合材料構造体１１のＸ，Ｙ方向に対して±４５度となるように配置するのが好ましい。   The skin material 13 is made of inorganic fibers such as carbon fibers, glass fibers, ceramic fibers, or organic fibers having high strength and high elastic modulus such as aramid fibers, poly-p-phenylenebenzobisoxazole fibers, and ultrahigh molecular weight polyethylene fibers. The formed fiber fabric for skin (skin fiber material) is impregnated and cured with resin. As the skin fiber fabric, for example, a plain weave fabric in which fibers are arranged in the X and Y directions is used, and a predetermined number of one or a plurality of sheets is used according to the intended physical properties of the composite material structure 11. When using a plurality of sheets, a part of the woven fabric is arranged so that the arrangement direction of the fibers is ± 45 degrees with respect to the X and Y directions of the composite material structure 11 so as to constitute a pseudo isotropic laminated material. Is preferred.

図１（ａ）及び（ｂ）に示すように、複合材料構造体１１において、上下のスキン材１３が互いに当接しあうように重ね合わされ、かつコア材１２を挟持しない部位であり、コア材１２を挟持した一部以外の部位（一対のスキン材１３の他部）を、スキン材１３同士の積層部１５とする。本実施形態では、積層部１５は、スキン材１３同士のコア材１２が設けられていない部分よりなるため、積層部１５はコア材１２を取り囲むように環状に設けられている。また、複合材料構造体１１において、コア材１２が設けられたスキン材１３同士の一部よりなるとともに、積層部１５以外の部位を被覆部１７とする。   As shown in FIGS. 1A and 1B, in the composite material structure 11, the upper and lower skin materials 13 are overlapped so as to be in contact with each other and the core material 12 is not sandwiched between them. A part other than a part of the skin material 13 (the other part of the pair of skin materials 13) is defined as a laminated portion 15 of the skin materials 13. In the present embodiment, the laminated portion 15 includes a portion where the core material 12 between the skin materials 13 is not provided. Therefore, the laminated portion 15 is provided in an annular shape so as to surround the core material 12. Further, in the composite material structure 11, it is made of a part of the skin material 13 provided with the core material 12, and a portion other than the laminated portion 15 is defined as a covering portion 17.

複合材料構造体１１の積層部１５は、結合部材１６によって結合されている。詳細には、スキン材１３の材料となるスキン用繊維織物同士が、結合部材１６の材料となる結合部材用繊維材料によって縫合されている。結合部材用繊維材料は、糸条繊維よりなり、この糸条繊維としては、炭素繊維、ガラス繊維、アラミド繊維、セラミック繊維等を束ねたもの、又は撚ったものが使用される。そして、結合部材用繊維材料は、両スキン用繊維織物を貫通した状態で両端を各スキン用繊維織物の表面で抜け止めすることで、スキン用繊維織物同士を縫合するとともに、積層部１５となる部位は、その全体に亘って結合部材用繊維材料により複数箇所が縫合されている。そして、スキン用繊維織物同士が結合部材用繊維材料によって縫合された状態で、スキン用繊維織物、及び結合部材用繊維材料に樹脂を含浸硬化させることにより、スキン材１３同士による積層部１５が形成されるとともに、その積層部１５が結合部材１６によって結合されている。   The laminated portion 15 of the composite material structure 11 is coupled by a coupling member 16. Specifically, the skin fiber fabrics that are the material of the skin material 13 are stitched together by the fiber material for the coupling member that is the material of the coupling member 16. The fiber material for the binding member is made of a yarn fiber, and as this yarn fiber, a bundle of carbon fiber, glass fiber, aramid fiber, ceramic fiber, or the like, or a twisted one is used. Then, the fiber material for the binding member stitches the fiber fabrics for skins together to form the laminated portion 15 by preventing both ends of the fiber fabrics for skins from coming off at the surface of each skin fiber fabric while penetrating both the fiber fabrics for skin. A plurality of parts are stitched together with the fiber material for the coupling member over the entire part. Then, in a state in which the fiber fabrics for skin are stitched together by the fiber material for the binding member, the skin fiber fabrics and the fiber material for the binding member are impregnated and cured to form a laminated portion 15 by the skin materials 13. In addition, the laminated portion 15 is coupled by the coupling member 16.

積層部１５においては、四角錐台状の被覆部１７の四辺の基端縁に沿った複数箇所が結合部材１６により結合され、被覆部１７の基端を取り囲むように積層部１５が結合されている。さらに、積層部１５は、結合部材１６により、複合材料構造体１１の長辺方向及び短辺方向に沿って等間隔おきに結合されており、結合部材１６による結合部を、複合材料構造体１１の長辺方向及び短辺方向に延びる仮想線Ｃで繋ぐと、仮想線Ｃが格子状をなす。なお、結合部材１６による結合部の間隔は、複合材料構造体１１の目的とする物性に応じて適宜設定されるが、間隔が狭いほど、スキン材１３同士の積層を強固に維持できる。   In the laminated portion 15, a plurality of locations along the base end edges of the four sides of the quadrangular frustum-shaped covering portion 17 are joined by the coupling member 16, and the laminated portion 15 is joined so as to surround the proximal end of the covering portion 17. Yes. Furthermore, the laminated portion 15 is joined at equal intervals along the long side direction and the short side direction of the composite material structure 11 by the joining member 16, and the joining portion by the joining member 16 is joined to the composite material structure 11. Are connected by virtual lines C extending in the long side direction and the short side direction, the virtual lines C form a lattice shape. In addition, although the space | interval of the coupling | bond part by the coupling member 16 is suitably set according to the target physical property of the composite material structure 11, the lamination | stacking of the skin materials 13 can be maintained firmly, so that an interval is narrow.

上記のように構成された複合材料構造体１１は、スキン材１３に樹脂を含浸させてＦＲＰ（繊維強化樹脂）とし、積層部１５で重ね合わされたスキン材１３同士も硬化した樹脂によって一体化されるとともに、コア材１２がＦＲＰ板製のスキン材１３で挟持されたサンドイッチ構造の複合材料構造体１１となる。また、上述のように結合部材用繊維材料にも樹脂が含浸されて繊維強化樹脂の結合部材１６となり、一対のスキン材１３と結合部材１６とが一体に硬化する。なお、樹脂としては、例えばエポキシ樹脂、不飽和ポリエステル樹脂、フェノール樹脂、ビニルエステル樹脂等の熱硬化性樹脂の他、ナイロンやＡＢＳ樹脂等の熱可塑性樹脂が使用される。また、熱硬化性樹脂と熱可塑性樹脂の混合樹脂も使用可能である。   The composite material structure 11 configured as described above is obtained by impregnating the skin material 13 with resin to form FRP (fiber reinforced resin), and the skin materials 13 overlapped in the laminated portion 15 are also integrated by the cured resin. At the same time, the composite material structure 11 having a sandwich structure in which the core material 12 is sandwiched by the skin material 13 made of the FRP plate is formed. Further, as described above, the fiber material for the coupling member is also impregnated with the resin to form the coupling member 16 of the fiber reinforced resin, and the pair of skin material 13 and the coupling member 16 are integrally cured. As the resin, for example, a thermosetting resin such as an epoxy resin, an unsaturated polyester resin, a phenol resin, or a vinyl ester resin, or a thermoplastic resin such as nylon or ABS resin is used. A mixed resin of a thermosetting resin and a thermoplastic resin can also be used.

次に、複合材料構造体１１の製造方法について説明する。
まず、下側のスキン材１３を形成するスキン用繊維織物と、上側のスキン材１３を形成するスキン用繊維織物とでコア材１２を挟む。そして、コア材１２の周りに位置する上下のスキン用繊維織物を重ね合わせ、スキン用繊維織物同士を結合部材用繊維材料によって縫合し、一体化する。そして、スキン用繊維織物とコア材１２とからなる中間体を、レジントランスファーモールディング（ＲＴＭ）法で用いられる成形金型内に載置する。この成形金型内に熱硬化性の樹脂を注入してスキン用繊維織物、結合部材用繊維材料に含浸させた後、加熱硬化させることで、複合材料構造体１１が得られる。 Next, a method for manufacturing the composite material structure 11 will be described.
First, the core material 12 is sandwiched between the skin fiber fabric forming the lower skin material 13 and the skin fiber fabric forming the upper skin material 13. Then, the upper and lower skin fiber fabrics positioned around the core material 12 are overlapped, and the skin fiber fabrics are stitched together with the fiber material for the coupling member to be integrated. And the intermediate body which consists of the textile fabric for skin and the core material 12 is mounted in the shaping die used by the resin transfer molding (RTM) method. A composite material structure 11 is obtained by injecting a thermosetting resin into the mold and impregnating the fiber fabric for skin and the fiber material for the binding member, followed by heat curing.

次に、複合材料構造体１１の作用について説明する。
複合材料構造体１１の積層部１５において、コア材１２周りに、コア材１２と、スキン材１３との熱膨張係数の違いによる熱応力や、曲げ、衝撃等の外部荷重による応力集中が発生したとする。このとき、熱応力や外部荷重による応力集中によって、上下のスキン材１３の間（層間）の樹脂には、スキン材１３同士を剥離させるように亀裂が生じてしまう場合がある。しかし、スキン材１３同士は、結合部材１６によって結合されているため、亀裂に対して最も近い結合部材１６の群列により、スキン材１３同士の剥離が抑制され、それら結合部材１６の群列よりもコア材１２から離れる方向に向けて亀裂が進展することが抑制される。 Next, the operation of the composite material structure 11 will be described.
In the laminated portion 15 of the composite material structure 11, thermal stress due to the difference in thermal expansion coefficient between the core material 12 and the skin material 13 and stress concentration due to external loads such as bending and impact occurred around the core material 12. And At this time, cracks may occur in the resin between the upper and lower skin materials 13 (interlayer) due to thermal stress or stress concentration due to external load so as to separate the skin materials 13 from each other. However, since the skin members 13 are connected to each other by the connecting member 16, peeling of the skin members 13 is suppressed by the group row of the connecting members 16 that is closest to the crack. The cracks are also prevented from progressing in the direction away from the core material 12.

上記実施形態によれば、以下のような効果を得ることができる。
（１）サンドイッチ構造を有する複合材料構造体１１において、スキン材１３同士の積層部１５を結合部材１６で結合し、機械的に結合した。このため、複合材料構造体１１の積層部１５において、コア材１２周りに熱応力や外部荷重による応力集中が発生し、万一、スキン材１３同士の間に両者を剥離させる亀裂が生じても、結合部材１６による縫合によってスキン材１３同士の結合が維持される。したがって、結合部材１６によるスキン材１３同士の結合により、亀裂がコア材１２から離れる方向に向けて進展することが抑制され、信頼性の高い複合材料構造体１１とすることができる。 According to the above embodiment, the following effects can be obtained.
(1) In the composite material structure 11 having a sandwich structure, the laminated portions 15 of the skin materials 13 are coupled by the coupling member 16 and mechanically coupled. For this reason, in the laminated portion 15 of the composite material structure 11, stress concentration due to thermal stress or external load occurs around the core material 12, and even if a crack that causes the two to peel between the skin materials 13 occurs. The skin material 13 is kept connected by stitching with the connecting member 16. Therefore, the bonding between the skin members 13 by the bonding member 16 suppresses the crack from progressing in the direction away from the core material 12, and a highly reliable composite material structure 11 can be obtained.

（２）スキン材１３同士の積層部１５を結合部材１６で結合し、スキン材１３同士の間に発生した亀裂の進展を抑制することができる。したがって、亀裂の進展の抑制のために、高靭性樹脂を使用したり、被覆部１７（コア材１２）の立ち上がり角度を小さく抑えたりする必要が無くなる。その結果として、亀裂の進展を抑制するために高靭性樹脂を使用する場合と比べると、樹脂の選択幅が広がり、複合材料構造体１１の製造コストを低減することができ、被覆部１７（コア材１２）の立ち上がり角度を考慮する場合と比べると、複合材料構造体１１の設計自由度を高めることができる。   (2) The laminated portion 15 between the skin materials 13 can be coupled by the coupling member 16, and the progress of cracks generated between the skin materials 13 can be suppressed. Therefore, it is not necessary to use a high toughness resin or to suppress the rising angle of the covering portion 17 (core material 12) to suppress the progress of cracks. As a result, compared with the case where a high-toughness resin is used to suppress the progress of cracks, the selection range of the resin is widened, the manufacturing cost of the composite material structure 11 can be reduced, and the covering portion 17 (core Compared with the case where the rising angle of the material 12) is considered, the degree of freedom in designing the composite material structure 11 can be increased.

（３）複合材料構造体１１の製造時、スキン用繊維織物同士の間にコア材１２を挟み、そのコア材１２を取り囲むように結合部材用繊維材料でスキン用繊維織物同士を縫合して中間体を形成した。このため、中間体を成形金型内に載置するとき、結合部材用繊維材料による縫合により、コア材１２がスキン用繊維織物内で位置ずれすることが防止され、コア材１２をスキン用繊維織物の所定位置に位置決めした状態で樹脂を含浸することができる。   (3) At the time of manufacturing the composite material structure 11, the core material 12 is sandwiched between the skin fiber fabrics, and the skin fiber fabrics are stitched together with the binding member fiber material so as to surround the core material 12. Formed body. For this reason, when the intermediate body is placed in the molding die, the core material 12 is prevented from being displaced in the skin fiber fabric by stitching with the fiber material for the coupling member. The resin can be impregnated while being positioned at a predetermined position of the fabric.

（４）積層部１５では、被覆部１７（コア材１２）の基端全体を取り囲むように結合部材１６で結合されている。このため、コア材１２を取り囲む位置のどの位置に熱応力や外部荷重による応力集中が発生し、亀裂が生じてもその亀裂の進展を抑制することができる。   (4) In the lamination | stacking part 15, it couple | bonds with the coupling member 16 so that the whole base end of the coating | coated part 17 (core material 12) may be surrounded. For this reason, even if the stress concentration by a thermal stress or an external load generate | occur | produces in any position of the position surrounding the core material 12, even if a crack arises, the progress of the crack can be suppressed.

（５）積層部１５はその全体に亘って結合部材１６によって結合されている。このため、積層部１５のどの位置で亀裂が生じても、結合部材１６によるスキン材１３の結合により亀裂が進展しにくくなる。   (5) The laminated portion 15 is coupled by the coupling member 16 over the whole. For this reason, even if a crack occurs in any position of the laminated portion 15, it is difficult for the crack to progress due to the coupling of the skin material 13 by the coupling member 16.

（６）複合材料構造体１１の製造時、スキン用繊維織物は結合部材用繊維材料によって縫合され、その結合部材用繊維材料は樹脂が含浸されると繊維強化樹脂製の結合部材１６となり一対のスキン材１３と一体硬化する。このため、結合部材１６はスキン材１３から抜けにくく、結合部材１６によるスキン材１３同士の結合をより強固に維持することができる。   (6) When the composite material structure 11 is manufactured, the fiber fabric for skin is stitched with the fiber material for the binding member, and when the fiber material for the binding member is impregnated with the resin, it becomes a binding member 16 made of fiber reinforced resin. It is cured integrally with the skin material 13. For this reason, the coupling member 16 is hard to come off from the skin material 13, and the coupling between the skin materials 13 by the coupling member 16 can be maintained more firmly.

（７）スキン材１３がスキン用繊維織物で構成されているため、それらスキン用繊維織物同士を、糸条繊維製の結合部材用繊維材料で縫合するのが容易になる。
なお、上記実施形態は以下のように変更してもよい。 (7) Since the skin material 13 is composed of the fiber fabric for skin, it is easy to sew the fiber fabrics for skin with the fiber material for the coupling member made of yarn fibers.
In addition, you may change the said embodiment as follows.

○ 図２に示すように、各スキン材１３は、複数枚のスキン用繊維織物（スキン用繊維材料）を、それらを貫通するＺ糸２０によって予め結合したものであってもよい。このＺ糸２０は、一方のスキン材１３の外面で折り返すように他方のスキン材１３の外面側からループ状に挿入される。   As shown in FIG. 2, each skin material 13 may be formed by previously joining a plurality of skin fiber fabrics (skin fiber materials) with Z yarns 20 penetrating them. The Z yarn 20 is inserted in a loop from the outer surface side of the other skin material 13 so as to be folded back on the outer surface of the one skin material 13.

○ 図３に示すように、コア材１２とスキン用繊維織物１３ａの中間体であり、スキン用繊維織物１３ａにおけるコア材１２が設けられてない部分（後の積層部１５）が、結合部材用繊維材料１６ａによって縫合されて縫合部１３ｃを有する中間体を形成する。そして、この中間体を上下に配置し、それら中間体の両縫合部１３ｃ同士の間にコ字状の連結部材２１を配置する。連結部材２１の両端側には、縫合部１３ｃと連結される連結片２１ａが板状に形成されている。そして、各連結部材２１の連結片２１ａと、各縫合部１３ｃとを、上記とは別の共用結合部材用繊維材料１６ｂによって縫合し、縫合部１３ｃと連結部材２１とを一体化する。そして、一対の中間体と、一対の連結部材２１とが一体化された中間基材を、ＲＴＭ法で用いられる成形金型内に載置する。この成形金型内に熱硬化性のマトリック樹脂を注入して複合材料構造体を製造する。   As shown in FIG. 3, the portion of the skin fiber fabric 13a where the core material 12 is not provided (later laminated portion 15) is an intermediate body between the core material 12 and the skin fiber fabric 13a. The intermediate body which has the stitching | suture part 13c by sewing with the fiber material 16a is formed. And this intermediate body is arrange | positioned up and down, and the U-shaped connection member 21 is arrange | positioned between both the stitching | suture parts 13c of these intermediate bodies. On both end sides of the connecting member 21, connecting pieces 21a connected to the stitching portion 13c are formed in a plate shape. Then, the connecting piece 21a of each connecting member 21 and each stitched portion 13c are stitched together with a fiber material 16b for a shared joint member different from the above, and the stitched portion 13c and the connecting member 21 are integrated. And the intermediate base material with which a pair of intermediate body and a pair of connection member 21 were integrated is mounted in the shaping | molding die used by RTM method. A thermosetting matrix resin is injected into the molding die to produce a composite material structure.

この複合材料構造体においては、一対の中間体と連結部材２１とを共用結合部材用繊維材料１６ｂで縫合している。このため、共用結合部材用繊維材料１６ｂに樹脂が含浸硬化された結合部材１６により、複合材料構造体を形成しつつ、積層部１５での亀裂の抑制機能も付与することができる。   In this composite material structure, the pair of intermediate bodies and the connecting member 21 are stitched together with the fiber material 16b for the common coupling member. For this reason, the bonding member 16 in which the resin material is impregnated and hardened into the common binding member fiber material 16b can also provide a function of suppressing cracks in the laminated portion 15 while forming a composite material structure.

○ 図４（ａ）に示すように、積層部１５において、被覆部１７（コア材１２）の基端のうちの短辺に沿った位置のみを結合部材１６で縫合してもよい。なお、図示しないが、積層部１５において、被覆部１７（コア材１２）の基端のうちの長辺に沿った位置のみを結合部材１６で結合してもよい。   As shown in FIG. 4A, in the laminated portion 15, only the position along the short side of the base end of the covering portion 17 (core material 12) may be sewn with the connecting member 16. Although not shown, only the position along the long side of the base end of the covering portion 17 (core material 12) in the laminated portion 15 may be coupled by the coupling member 16.

○ 図４（ｂ）に示すように、積層部１５において、被覆部１７（コア材１２）の基端のうち角部を囲む位置のみを結合部材１６で結合してもよい。
○ 実施形態では、積層部１５の全体を結合部材１６で結合したが、被覆部１７（１２）を取り囲む結合部材１６の群列が一列だけ形成されるように、結合部材１６で積層部１５を結合してもよい。 As shown in FIG. 4B, in the laminated portion 15, only the position surrounding the corner portion of the base end of the covering portion 17 (core material 12) may be coupled by the coupling member 16.
In the embodiment, the entire laminated portion 15 is joined by the coupling member 16, but the laminated portion 15 is joined by the coupling member 16 so that only one row of the group of coupling members 16 surrounding the covering portion 17 (12) is formed. May be combined.

○ 実施形態では、結合部材１６による結合部を、複合材料構造体１１の長辺方向及び短辺方向に延びる仮想線Ｃで繋ぐと、仮想線Ｃが格子状をなすような位置で積層部１５を結合したが、結合部が千鳥状をなすような位置で積層部１５を結合してもよい。さらには、積層部１５は、その全体に亘ってランダムな位置で結合部材１６によって結合されていてもよい。   In the embodiment, when the coupling portion by the coupling member 16 is connected by the imaginary line C extending in the long side direction and the short side direction of the composite material structure 11, the laminated portion 15 is located at a position where the imaginary line C forms a lattice shape. However, the laminated portions 15 may be joined at positions where the joining portions form a staggered pattern. Furthermore, the lamination | stacking part 15 may be couple | bonded by the coupling member 16 in the random position over the whole.

○ 実施形態では、結合部材用繊維材料は、両スキン用繊維材料を貫通した状態で両端を各スキン用繊維材料の表面で抜け止めすることでスキン用繊維材料同士を縫合したが、これに限らず、結合部材用繊維材料は両スキン用繊維材料の表面で交互に折り返す蛇行状態でスキン用繊維材料同士を縫合してもよい。   ○ In the embodiment, the fiber material for the binding member stitches the fiber materials for skin together by securing both ends with the surface of each skin fiber material in a state of penetrating both skin fiber materials. Instead, the fiber material for a binding member may be stitched together in a meandering state in which the fiber material for a binding member is alternately folded on the surfaces of both skin fiber materials.

○ スキン用繊維材料及び結合部材用繊維材料にマトリックス樹脂を含浸させる方法としてＲＴＭ法以外に、ＲＦＩ（レジンフィルムインフュージョン）法を採用してもよい。
○ 複合材料構造体１１のスキン材１３として、予め樹脂が含浸された繊維強化樹脂（プリプレグ）を用いて形成したものとしてもよい。 O In addition to the RTM method, an RFI (resin film infusion) method may be employed as a method of impregnating the fiber material for skin and the fiber material for the binding member with the matrix resin.
O The skin material 13 of the composite material structure 11 may be formed using a fiber reinforced resin (prepreg) impregnated with a resin in advance.

○ 実施形態では、コア材１２としてハニカム構造体を採用したが、発泡体を採用してもよい。
○ 結合部材用繊維材料によるスキン用繊維材料同士の縫い方は、どんな縫い方でもよく、例えば、ミシン縫いや手縫いであってもよい。 In the embodiment, a honeycomb structure is adopted as the core material 12, but a foam may be adopted.
O The method of sewing the fiber material for skin with the fiber material for the binding member may be any sewing method, for example, sewing or hand sewing.

○ 実施形態では、スキン用繊維材料として、スキン用繊維織物に具体化したが、織物ではなく直線状に配列された繊維により繊維層を形成するとともに、その繊維層が積層されたものに具体化してもよい。   ○ In the embodiment, the skin fiber material is embodied as a skin fiber fabric, but the fiber layer is formed by fibers arranged in a straight line instead of the fabric, and the fiber layer is laminated. May be.

○ 実施形態では、結合部材として糸条繊維製の結合部材用繊維材料に具体化し、スキン用繊維材料を結合部材用繊維材料で縫合したが、結合部材として繊維にマトリックス樹脂を含浸させた棒状のピンに具体化してもよい。   ○ In the embodiment, the fiber material for the coupling member made of yarn fiber is embodied as the coupling member, and the skin fiber material is stitched with the fiber material for the coupling member, but the rod-like material in which the fiber is impregnated with the matrix resin as the coupling member It may be embodied in a pin.

次に、上記実施形態及び別例から把握できる技術的思想について以下に追記する。
（イ）前記結合部材は、前記スキン材同士を複数箇所で等間隔おきに結合している請求項１〜請求項３のうちいずれか一項に記載の複合材料構造体。 Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) The joint member is a composite material structure according to any one of claims 1 to 3, wherein the skin members are joined to each other at equal intervals at a plurality of locations.

（ロ）前記結合部材は、繊維強化樹脂のＺピンである請求項１〜請求項３、及び技術的思想（イ）のうちいずれか一項に記載の複合材料構造体。   (B) The coupling member is a Z pin of a fiber reinforced resin. The composite material structure according to any one of claims 1 to 3 and a technical idea (a).

１１…複合材料構造体、１２…コア材、１３…スキン材、１３ａ…スキン用繊維材料としてのスキン用繊維織物、１６…結合部材、１６ａ…結合部材用繊維材料。   DESCRIPTION OF SYMBOLS 11 ... Composite material structure, 12 ... Core material, 13 ... Skin material, 13a ... Textile fabric for skin as a fiber material for skins, 16 ... Binding member, 16a ... Fiber material for binding members

Claims (4)

繊維強化樹脂のスキン材同士の間にコア材を挟んだサンドイッチ構造を有する複合材料構造体において、
前記コア材は両スキン材の一部に設けられ、
前記コア材周りの少なくとも一部において、前記スキン材同士を繊維強化樹脂の結合部材で結合したことを特徴とする複合材料構造体。 In a composite material structure having a sandwich structure in which a core material is sandwiched between skin materials of fiber reinforced resin,
The core material is provided in a part of both skin materials,
A composite material structure characterized in that the skin materials are bonded to each other by a fiber-reinforced resin bonding member in at least a part around the core material. 前記スキン材同士の前記コア材が設けられていない部分の全体を前記結合部材で結合した請求項１に記載の複合材料構造体。   The composite material structure according to claim 1, wherein the entire portion of the skin material where the core material is not provided is coupled by the coupling member. 前記結合部材は、前記スキン材同士を縫合する糸条繊維に樹脂を含浸させてなる請求項１又は請求項２に記載の複合材料構造体。   The composite material structure according to claim 1 or 2, wherein the coupling member is made by impregnating a resin into a yarn fiber that stitches the skin materials together. 繊維強化樹脂のスキン材同士の間にコア材を挟んだサンドイッチ構造を有する複合材料構造体の製造方法であって、
前記スキン材の材料であるスキン用繊維材料で前記コア材を挟み、
前記スキン用繊維材料同士を前記コア材周りの少なくとも一部において結合部材用繊維材料により結合し、
前記スキン用繊維材料及び結合部材用繊維材料に樹脂を含浸硬化させて該スキン用繊維材料及び結合部材用繊維材料を繊維強化樹脂とすることを特徴とする複合材料構造体の製造方法。 A method for producing a composite material structure having a sandwich structure in which a core material is sandwiched between skin materials of fiber reinforced resin,
Sandwiching the core material with a skin fiber material that is a material of the skin material,
The fiber materials for skin are bonded to each other by a fiber material for a binding member in at least a part around the core material,
A method for producing a composite material structure, comprising impregnating and curing a resin in the fiber material for skin and the fiber material for bonding member, and using the fiber material for skin and the fiber material for bonding member as a fiber reinforced resin.
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JP4067855B2 (en) * 2002-04-04 2008-03-26 福井ファイバーテック株式会社 Fiber-reinforced resin plate with improved bending strength in the longitudinal direction

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