JP2015199316A - Fiber reinforced composite material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber reinforced composite material in which adhesive strength between a honeycomb core material and a skin plate can be improved while suppressing production cost.SOLUTION: Provided is a fiber reinforced composite material 10 including: a honeycomb core material 11 in which hollow prismatics 13 are formed so as to be arranged without gaps plurally; and a pair of fiber reinforcing resin plates 12, 12 adhered on both the sides of the honeycomb core material 11. At the space between the side faces 15 of the adjacent prismatics 13, a holding space 16 held between their side faces is formed, and an adhesive 17 is filled into the holding space 16.

Description

  The present invention relates to a fiber reinforced composite material.

  2. Description of the Related Art Conventionally, a so-called sandwich structure is known as a member constituting an automobile body or an airplane body (for example, Patent Document 1). The sandwich structure described in Patent Document 1 includes a honeycomb core material formed such that a plurality of hollow polygonal columns are arranged in parallel without gaps, and a pair of skin plates bonded to both surfaces of the honeycomb core material. .

US Pat. No. 6,692,681

  However, since the contact area between the both surfaces of the honeycomb core material and the skin plate is small, the bonding area between the honeycomb core material and the skin plate is reduced, and the bonding strength between the honeycomb core material and the skin plate may be reduced. In addition, the adhesive strength between the honeycomb core material and the skin plate can be increased by using a sheet-like adhesive as an adhesive that bonds the honeycomb core material and the skin plate. It is expensive and increases the manufacturing cost of the sandwich structure.

  Then, an object of this invention is to provide the fiber reinforced composite material which can improve the adhesive strength of a honeycomb core material and a skin plate, suppressing manufacturing cost.

  The fiber-reinforced composite material according to the present invention includes a honeycomb core material formed so that a plurality of hollow polygonal columns are arranged in parallel. A holding space sandwiched between these side surfaces is formed between the side surfaces of the adjacent polygonal columns, and this holding space is filled with an adhesive.

  In the present invention, since the side surfaces of the adjacent polygonal columns are adjacent to each other via a holding space (gap), the contact area with the skin plate per polygonal column is increased, and the honeycomb core material and the skin plate And the adhesive strength is improved. Moreover, since the adhesive is filled in the holding space, it is not necessary to use a sheet-like adhesive, and the manufacturing cost of the fiber-reinforced composite material can be suppressed.

It is a disassembled perspective view of the fiber reinforced composite material which concerns on embodiment of this invention. It is a principal part enlarged plan view of the honeycomb core material which concerns on embodiment of this invention. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification. It is a principal part enlarged plan view of the honeycomb core material which concerns on a modification.

    Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the fiber reinforced composite material 10 includes a honeycomb core material 11A and a pair of fiber reinforced resin plates (skin plates) 12 and 12 bonded to both surfaces of the honeycomb core material 11A. . This fiber reinforced composite material 10 is also called a sandwich panel.

  The fiber reinforced composite material 10 can be applied to, for example, a member constituting a car body of an automobile, and more specifically, can be applied to a hood (bonnet), a roof, a seat back panel, a suspension member, and the like. . In addition, the fiber reinforced composite material 10 is not limited to the member which comprises the vehicle body of a motor vehicle, It is possible to apply to various structural members, such as the member which comprises the fuselage of an airplane.

  The fiber reinforced resin plate 12 constitutes the surface layer (front surface and back surface) of the fiber reinforced composite material 10. The fiber reinforced resin plate 12 is formed in a plate shape from a fiber reinforced resin (fiber reinforced plastic). As the fiber reinforced resin, various fiber reinforced resins such as carbon fiber reinforced resin (CFRP), glass fiber reinforced resin (GFRP), and aramid fiber reinforced resin (AFRP) can be used. The plate thickness of the fiber reinforced resin plate 12 is, for example, about 1 mm, and the plate thickness of the entire fiber reinforced composite material 10 is, for example, about 10 mm.

  A honeycomb core material 11A according to the present embodiment will be described with reference to FIG.

  The honeycomb core material 11 </ b> A constitutes a core layer of the fiber reinforced composite material 10. The honeycomb core material 11A is formed from the foil material 14A so that a plurality of hollow polygonal columns 13A (honeycomb) are juxtaposed in a row (continuously). As this honeycomb, various honeycombs such as an aluminum honeycomb, an aramid honeycomb, and a paper honeycomb can be used. In the honeycomb core material 11A according to the present embodiment, the polygonal column 13A is formed in a substantially hexagonal cross section. The foil material 14A is made of aluminum foil (aluminum honeycomb), aramid paper (aramid honeycomb), kraft paper (paper honeycomb), or the like. In the present embodiment, the plurality of foil materials 14A in the honeycomb core material 11A are bonded to each other by an adhesive 17A described later so that the bonding locations are staggered in the thickness direction of the foil material 14A. The cross-sectional shape of the polygonal column 13A is not limited to a substantially hexagonal shape, and may be another polygonal shape such as a substantially rectangular shape. That is, in the present invention, the “polygonal column” in the honeycomb is not limited to the hexagonal column, but includes other polygonal columns such as a quadrangular column.

  A holding space (gap) 16A sandwiched between the side surfaces 15A is formed between the side surfaces 15A of adjacent polygonal columns 13A, and the holding space 16A is filled with an adhesive 17A. In the honeycomb core material 11A of the present embodiment, a recess 18A is provided on the side surface 15A of the adjacent polygonal column 13A to form a holding space 16A (closed cross section) between the side surfaces 15A of the adjacent polygonal column 13A. Yes. The recess 18A can be formed in the foil material 14A by, for example, embossing or folding. In the present embodiment, the recess 18A has a triangular cross section, and is formed so that the entire side surface 15A protrudes in a direction away from the adjacent side surface 15A. Further, the recess 18A is provided over the entire length from one end surface to the other end surface of the honeycomb core material 11A. For this reason, the columnar adhesive lump by the adhesive 17A filled in the holding space 16A is also provided over the entire length from one end surface to the other end surface of the honeycomb core material 11A. The width W (see FIG. 2) of the holding space 16A is, for example, about 1 mm.

  As the adhesive 17A filling the holding space 16A, an epoxy resin adhesive, a urethane resin adhesive, or the like can be used. Further, the adhesive 17A filled in the holding space 16A may be a thermosetting adhesive or a thermoplastic adhesive.

  The fiber reinforced resin plates 12 are superposed on both surfaces of the honeycomb core material 11A, and these laminates (the honeycomb core material 11A and the pair of fiber reinforced resin plates 12 and 12) are sandwiched from above and below and pressed and heated. By doing so, the adhesive 17A filled in the holding space 16A is melted and cured, and the honeycomb core material 11A and the fiber reinforced resin plate 12 are bonded by the adhesive 17A. Note that an adhesive may be preliminarily applied to both surfaces of the honeycomb core material 11A before pressing and heating the laminate.

  Next, modifications of the honeycomb core material 11 will be described with reference to FIGS. 3 to 16.

  The honeycomb core materials 11B to 11F shown in FIG. 3 to FIG. 7 are formed from the foil materials 14B to 14F so that the hollow polygonal columns 13B to 13F are arranged in parallel without gaps. In the honeycomb core materials 11B to 11F, the recessed spaces 18B to 18F are provided on the side surfaces 15B to 15F of the adjacent polygonal columns 13B to 13F, respectively, so that the holding space 16B is provided between the side surfaces 15B to 15F of the adjacent polygonal columns 13B to 13F. ~ 16F (closed section) is formed.

  In the honeycomb core material 11B shown in FIG. 3, the recess 18B has a trapezoidal cross section and is formed so that the entire side surface 15B protrudes in a direction away from the adjacent side surface 15B. In the honeycomb core material 11C shown in FIG. 4, the recess 18C has a trapezoidal cross section, and is formed so that only the central portion of the side surface 15C protrudes in a direction away from the adjacent side surface 15C. In the honeycomb core material 11D shown in FIG. 5, the recess 18D has a semicircular shape, and only the central part of the side surface 15D is formed so as to protrude in the direction away from the adjacent side surface 15D. Further, as in the honeycomb core material 11E shown in FIG. 6, the recesses 18E may be provided only on a part of the side surfaces 15E instead of providing the recesses 18E on all the side surfaces 15E. Furthermore, like the honeycomb core material 11F shown in FIG. 7, the foil material 14F provided with the recesses 18F and the foil material 14F without the recesses 18F may be combined.

  The honeycomb core materials 11G to 11L shown in FIG. 8 to FIG. 13 are formed from the foil materials 14G to 14L so that the hollow polygonal columns 13G to 11L are arranged in parallel without gaps. In the honeycomb core materials 11G to 11L, by providing the convex portions 19G to 19L on the side surfaces 15G to 15L of the adjacent polygonal columns 13G to 13L, the holding spaces are provided between the side surfaces 15G to 15L of the adjacent polygonal columns 13G to 13L. 16G-16L (open cross section) is formed.

  In the honeycomb core material 11G shown in FIG. 8, the convex portion 19G has a triangular cross section, and is formed so that the entire side surface 15G is convex in a direction approaching the adjacent side surface 15G. In the honeycomb core material 11H shown in FIG. 9, the convex portion 19H has a trapezoidal cross section and is formed so that the entire side surface 15H is convex in a direction approaching the adjacent side surface 15H. In the honeycomb core material 11I shown in FIG. 10, the convex portion 19I has a trapezoidal cross section, and is formed so that only the central portion of the side surface 15I is convex in the direction approaching the adjacent side surface 15I. In the honeycomb core material 11J shown in FIG. 11, the convex portion 19J has a semicircular shape, and is formed so that only the central portion of the side surface 15J is convex in the direction approaching the adjacent side surface 15J. Further, as in the honeycomb core material 11K shown in FIG. 12, the convex portions 19K may be provided only on a part of the side surfaces 15K, instead of providing the convex portions 19K on all the side surfaces 15K. Furthermore, like the honeycomb core material 11L shown in FIG. 13, the foil material 14L provided with the convex portions 19L and the foil material 14L without the convex portions 19L may be combined.

  The honeycomb core materials 11M and 11N shown in FIGS. 14 and 15 are respectively formed from the foil materials 14M and 14N so that the hollow polygonal columns 13M and 11N are arranged in parallel without a plurality of gaps. In the honeycomb core materials 11M and 11N, the side surfaces 15M and 15N of the adjacent polygonal columns 13M and 13N are formed in an uneven shape, respectively. In the honeycomb core material 11M shown in FIG. 14, a stepped step portion 20 is formed on the side surface 15M of the polygonal column 13M. In the honeycomb core material 11N shown in FIG. 15, the corrugated portion 21 is formed on the side surface 15N of the polygonal column 13N.

  A honeycomb core material 11O shown in FIG. 16 is formed from a foil material 14O so that a plurality of hollow polygonal columns 13O are arranged in parallel without gaps. In the honeycomb core material 11O, the solid space 22 is mixed into the adhesive 17O applied to the side surface 15O of the polygonal column 13O, thereby forming a holding space 16O (open cross section) between the side surfaces 15O of the adjacent polygonal column 13O. . As the solid 22 mixed in the adhesive 17O, one having a softening temperature higher than the melting temperature of the adhesive 17O (for example, glass beads) can be used. The outer diameter of the solid 22 (glass beads) is, for example, about 1 mm.

    Below, the effect by this embodiment is demonstrated.

  (1) The fiber reinforced composite material 10 according to the present embodiment includes a honeycomb core material 11A formed such that a plurality of hollow polygonal columns 13A are arranged in parallel without gaps, and a pair of fiber reinforced materials bonded to both surfaces of the honeycomb core material 11A. Resin plates 12 and 12. A holding space 16A sandwiched between the side surfaces 15A is formed between the side surfaces 15A of the adjacent polygonal pillars 13A, and the holding space 16A is filled with an adhesive.

  In the fiber reinforced composite material 10 according to the present embodiment, in the honeycomb core material 11A, the side surfaces 15A of the adjacent polygonal columns 13A are adjacent to each other via the holding space 16A, and the holding space 16A is filled with the adhesive 17A. Has been. According to the present embodiment, since the holding space 16A is formed between the side surfaces 15A of the adjacent polygonal columns 13A, the contact area with the fiber reinforced resin plate 12 per one polygonal column 13A increases, and the honeycomb The adhesive strength between the core material 11A and the fiber reinforced resin plate 12 is improved. Further, the bonding strength is further improved by bonding the honeycomb core material 11A and the fiber reinforced resin plate 12 with an adhesive filled in the holding space 16A.

  By the way, a sheet-like adhesive is used as an adhesive for adhering the honeycomb core material 11A and the fiber-reinforced resin plate 12, but this sheet-like adhesive is relatively expensive and the manufacturing cost of the fiber-reinforced composite material 10 is low. Increase. On the other hand, according to this embodiment, it is not necessary to use a sheet-like adhesive, and a general adhesive can be used. Therefore, the manufacturing cost of the fiber reinforced composite material 10 can be suppressed.

  (2) The holding space 16A may be formed by forming a concave portion 18A or a convex portion on at least one of the side surfaces 15A of the adjacent polygonal columns 13A (see FIGS. 2 to 15).

  By doing in this way, it is possible to easily form the holding space 16A between the side surfaces 15A of the adjacent polygonal columns 13A. By forming the holding space 16A between the side surfaces 15A of the adjacent polygonal columns 13A, the contact area with the fiber reinforced resin plate 12 per one polygonal column 13A is increased, and the honeycomb core material 11A and the fiber reinforced resin are increased. The adhesive strength with the plate 12 is improved.

  (3) As shown in FIG. 16, by mixing solid 22 having a softening temperature higher than the melting temperature of adhesive 17O into adhesive 17O applied to side surface 15O of polygonal column 13O, holding space 16O is formed. You may make it form.

  Also in this way, the holding space 16O can be easily formed between the side surfaces 15O of the adjacent polygonal columns 13O. By forming the holding space 16O between the side surfaces 15O of the adjacent polygonal columns 13O, the contact area with the fiber reinforced resin plate 12 per one polygonal column 13O is increased, and the honeycomb core material 11O and the fiber reinforced resin are increased. The adhesive strength with the plate 12 is improved.

  By the way, although the fiber reinforced composite material of the present invention has been described by taking the above embodiment as an example, the present invention is not limited to this embodiment, and various other embodiments can be adopted without departing from the gist of the present invention. .

DESCRIPTION OF SYMBOLS 10 Fiber reinforced composite material 11 Honeycomb core material 12 Fiber reinforced resin board 13 Polygonal column 15 Side surface 16 Holding space 17 Adhesive agent 18 Concave part 19 Convex part 22 Solid

Claims (3)

A honeycomb core material formed such that a plurality of hollow polygonal columns are arranged in parallel;
A pair of fiber reinforced resin plates bonded to both surfaces of the honeycomb core material,
A fiber-reinforced composite material, wherein a holding space sandwiched between these side surfaces is formed between the side surfaces of the adjacent polygonal columns, and the holding space is filled with an adhesive.   The fiber-reinforced composite material according to claim 1, wherein the holding space is formed by forming a concave portion or a convex portion on at least one of the side surfaces of the adjacent polygonal columns.   The holding space is formed by mixing a solid having a softening temperature higher than a melting temperature of the adhesive into the adhesive applied to the side surface of the polygonal column. Fiber reinforced composite material.

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