WO2019181184A1 - 複合材料構造体及び複合材料構造体の製造方法 - Google Patents

複合材料構造体及び複合材料構造体の製造方法 Download PDF

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Publication number
WO2019181184A1
WO2019181184A1 PCT/JP2019/002114 JP2019002114W WO2019181184A1 WO 2019181184 A1 WO2019181184 A1 WO 2019181184A1 JP 2019002114 W JP2019002114 W JP 2019002114W WO 2019181184 A1 WO2019181184 A1 WO 2019181184A1
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Prior art keywords
composite material
reinforcing fiber
resin
low
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/002114
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English (en)
French (fr)
Japanese (ja)
Inventor
俊哉 荒木
智生 滝沢
弘晃 山口
村木　俊宣
駿佑 吉野
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to US16/981,565 priority Critical patent/US11763958B2/en
Priority to EP19770413.3A priority patent/EP3769962A4/en
Publication of WO2019181184A1 publication Critical patent/WO2019181184A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Definitions

  • the present invention relates to a composite material structure and a method for manufacturing the composite material structure.
  • a composite material in which a reinforcing fiber is impregnated with a resin is used for a structure constituting a structure such as an aircraft, an automobile, a vehicle, and a ship.
  • This structure has a structure in which composite materials are joined and integrated. Examples of the bonding between the composite materials include bonding with an adhesive or the like, and fastening with a bolt, a nut, or the like.
  • Patent Document 1 a structure in which a metal material is integrated through an insulating material has been proposed with a lightning protection measure by providing electrical conduction between the integrated metal materials.
  • the structure in which composite materials are joined and integrated that is, the composite material structure may be covered with a resin that does not have conductivity even when the reinforcing fiber has conductivity. Therefore, there was a problem that lightning protection measures could not be taken.
  • the present invention has been made in view of the above, and in a composite material structure in which a composite material in which a reinforcing fiber is impregnated with a resin is joined, a composite material structure and a composite material in which appropriate lightning protection measures are taken
  • An object of the present invention is to provide a method for manufacturing a structure.
  • the composite material structure includes a first composite material having a first reinforcing fiber having conductivity and a first resin impregnated in the first reinforcing fiber; A second composite material which is integrated with the first composite material and has a second reinforcing fiber having conductivity and a second resin impregnated in the second reinforcing fiber; and an electric resistance is the first resin and the second resin.
  • a low-conductivity material that has a lower conductivity than the first resin and the second reinforcement fiber, and that electrically connects the first reinforcement fiber and the second reinforcement fiber. It is characterized by including.
  • the electric resistance is lower than that of the first resin and the second resin, and the first reinforcing fiber and Since conduction is made with a low-conductivity material higher than the second reinforcing fiber, electricity from lightning can flow in an appropriate range that leaves no damage to the first composite material and the second composite material. Can be applied.
  • an insulating adhesive layer that has electrical insulation and is integrated by adhering the first composite material and the second composite material may further be included. According to this configuration, even when the cost is reduced and the entire structure is reduced in weight, appropriate lightning protection measures can be similarly taken.
  • the low-conductivity material is electrically connected to the first reinforcing fiber by being embedded in the first resin and having the other end embedded in the second resin. It is preferable that the second reinforcing fiber is electrically connected. According to this configuration, since the low conductive material can be electrically connected to the first reinforcing fiber and the second reinforcing fiber at the embedded one end and the other end, it is possible to appropriately set a path through which electricity by lightning flows. it can.
  • first resin and the second resin may both be thermoplastic resins. According to this configuration, by heating and cooling the first resin and the second resin, it is possible to appropriately adjust and change the path through which electricity by lightning flows.
  • the low conductivity material is electrically connected to a first exposed portion of one end of the first reinforcing fiber exposed on the surface of the first composite material. It is preferable that the end is electrically connected to the second exposed portion of the second reinforcing fiber exposed on the surface of the second composite material. According to this configuration, in the first exposed portion and the second exposed portion, the low conductive material can conduct with the first reinforcing fiber and the second reinforcing fiber. can do.
  • the low conductive material is disposed through the first composite material and the second composite material so that the first composite material and the second composite material are disposed. It is preferable to include a low conductive sleeve that covers the fastener that integrates the composite material. According to this configuration, even when it is necessary to integrate the first composite material and the second composite material with the fastener, it is possible to appropriately take appropriate lightning protection measures.
  • a method of manufacturing a composite material structure includes a first composite fiber having a first reinforcing fiber having conductivity and a first resin impregnated in the first reinforcing fiber.
  • the electrical resistance is lower than that of the first resin and the second resin, and has a lower conductivity than that of the first reinforcing fiber and the second reinforcing fiber, and the first reinforcing fiber and the second reinforcing fiber are electrically connected.
  • the electrical resistance between the first reinforcing fiber impregnated with the first resin and the second reinforcing fiber impregnated with the second resin is reduced between the first resin and the second resin by the low conductive material installation step. Because it is conductive with a lower conductive material lower than the first reinforcing fiber and the second reinforcing fiber, it is possible to flow electricity from lightning in an appropriate range that does not leave damage to the first composite material and the second composite material Thus, a composite material structure with appropriate lightning protection measures can be obtained.
  • FIG. 1 is a perspective view showing a composite material structure according to the first embodiment.
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG.
  • FIG. 3 is a flowchart showing the method for manufacturing the composite material structure according to the first embodiment.
  • FIG. 4 is a perspective view showing a composite material structure according to the second embodiment.
  • 5 is a cross-sectional view taken along the line BB of FIG.
  • FIG. 6 is a perspective view showing a composite material structure according to the third embodiment.
  • 7 is a cross-sectional view taken along the line CC of FIG.
  • FIG. 8 is a perspective view showing a composite material structure according to the fourth embodiment.
  • 9 is a cross-sectional view taken along the line DD of FIG.
  • FIG. 1 is a perspective view showing a composite material structure 10 according to the first embodiment.
  • FIG. 2 is a cross-sectional view taken along the line AA in FIG.
  • the composite material structure 10 includes a first composite material 11, a second composite material 12, and a low-conductivity material 13.
  • the composite material structure 10 is exemplified in an aircraft fuselage in the first embodiment, but is not limited to this in the present invention, and is used in other structures such as an automobile, a vehicle, and a ship. It may be.
  • the first composite material 11 has a first reinforcing fiber having conductivity and a first resin impregnated in the first reinforcing fiber.
  • the first resin may cover the first reinforcing fiber.
  • the first composite material 11 is exemplified by a T-shaped column used for a stringer, a frame, or a longillon in an aircraft fuselage.
  • the first composite material 11 includes a plate-like flange portion provided to face one plane of the second composite material 12, and a plate-like web portion extending along a direction orthogonal to the flange portion. And an integrated shape.
  • the first composite material 11 is provided with a through hole 11 a that penetrates the web portion along a direction orthogonal to the web portion.
  • the shape of the first composite material 11 is not limited to this, and any shape may be used as long as it has a surface connected to and integrated with the second composite material 12. .
  • the second composite material 12 includes a second reinforcing fiber having conductivity and a second resin impregnated in the second reinforcing fiber.
  • the second resin may cover the second reinforcing fiber.
  • the second composite material 12 is exemplified by a plate shape used for a skin in an aircraft fuselage.
  • the second composite material 12 has a low conductive material 13 (described later) in a predetermined region adjacent to the region where the first composite material 11 is provided on the surface of the first composite material 11 facing the flange portion. A buried portion 12a to be buried is provided.
  • the shape of the second composite material 12 is not limited to this, and any shape having a surface connected to and integrated with the first composite material 11 may be used.
  • first reinforcing fiber and the second reinforcing fiber examples include those obtained by bundling several hundred to several thousand basic fibers of 5 ⁇ m or more and 7 ⁇ m or less.
  • the basic fibers constituting the first reinforcing fiber and the second reinforcing fiber are exemplified by carbon fibers and metal fibers having conductivity.
  • the first composite material 11 and the second composite material 12 may be mixed with glass fibers, aramid fibers, and plastic fibers in addition to the conductive first and second reinforcing fibers.
  • thermosetting resin As for 1st resin and 2nd resin, the thing in which the main component is a thermosetting resin is illustrated, and an epoxy resin, a polyester resin, and a vinyl ester resin are illustrated.
  • the first resin and the second resin may be mixed with a thermoplastic resin in addition to the thermosetting resin.
  • examples of the thermoplastic resin to be mixed include polyamide resin, polypropylene resin, ABS (Acrylonitrile Butadiene Styrene) resin, polyether ether ketone (PEEK), polyether ketone ketone (PEKK), and polyphenylene sulfide (PPS). Is done.
  • the first resin and the second resin are not limited to this, and other resins may be used.
  • the thermosetting resin can be in a softened state, a cured state, and a semi-cured state.
  • the softened state is a state before thermosetting the thermosetting resin.
  • the softened state is a state that does not have self-supporting property, and is a state where the shape cannot be maintained when it is not supported by the support.
  • the softened state is a state in which the thermosetting resin can be thermoset by being heated.
  • the cured state is a state after thermosetting the thermosetting resin.
  • the cured state is a state having self-supporting property, and is a state in which the shape can be maintained even when not supported by the support.
  • the cured state is a state where the thermosetting resin cannot perform a thermosetting reaction even when heated.
  • the semi-cured state is a state between a softened state and a cured state.
  • the semi-cured state is a state in which thermosetting resin having a degree weaker than the cured state is made into a thermosetting resin.
  • the semi-cured state is a state having self-supporting property, and is a state in which the shape can be maintained even when not supported by the support.
  • the semi-cured state is a state in which the thermosetting resin can be thermoset by being heated.
  • an intermediate substrate of a composite material in which reinforcing fibers are impregnated with an uncured thermosetting resin is appropriately referred to as a prepreg.
  • the low conductive material 13 has an electrical resistance lower than that of the first resin and the second resin, and has a lower conductivity than the first reinforcing fiber and the second reinforcing fiber.
  • the low-conductivity material constituting the low-conductivity material 13 is formed by mixing conductive carbon powder with an insulating material containing resin and having electrical insulation, and has a predetermined shape. Examples of the molded material are as follows.
  • the low conductivity material constituting the low conductivity material 13 is not limited to this, and the low conductivity material 13 and the first reinforcing fiber are electrically connected to each other, and the low conductivity material. Any material may be used as long as the electrical resistance value between the conductive material 13 and the second reinforcing fiber is 10 3 ⁇ to 10 8 ⁇ . .
  • the low conductive material 13 includes a region 13a, a region 13b, and a region 13c.
  • the region 13a is a portion that is not in contact with either the first reinforcing fiber or the second reinforcing fiber.
  • the region 13a is a region between the region 13b and the region 13c, and a part of the region 13a extends in a direction in which the first composite material 11 and the second composite material 12 are opposed to each other. It is placed in contact with the side.
  • the region 13b is a region at one end of the low conductive material 13, and is a portion adjacent to one side of the region 13a.
  • the region 13b is a portion that is embedded in the first resin in the through-hole 11a and is in contact with the first reinforcing fiber and is electrically connected to the first reinforcing fiber.
  • the region 13c is a region on the other end of the low conductive material 13, and is a portion adjacent to the other side of the region 13a.
  • the region 13c is a portion that contacts the second reinforcing fiber and is electrically connected to the second reinforcing fiber by being embedded in the second resin in the embedded portion 12a.
  • the composite material structure 10 includes the low-conductive material 13 having such a structure, the low-conductive material 13 can conduct with the first reinforcing fiber and the second reinforcing fiber.
  • the route can be set appropriately.
  • the composite material structure 10 preferably has an electrical resistance value of 10 3 ⁇ or higher.
  • the low conductive material 13 can prevent an excessive current from flowing to generate an excessive Joule heat or a starting point for electricity to flow into the internal structure.
  • the electrical resistance value is preferably 10 8 ⁇ or less. The potential difference generated between the first composite material 11 and the second composite material 12 due to static electricity as well as electricity due to can be appropriately reduced.
  • the electrical resistance between the first reinforcing fiber impregnated with the first resin and the second reinforcing fiber impregnated with the second resin is between the first resin and the first resin. Since conduction is made with the low conductive material 13 lower than the first resin and lower than the first reinforcing fiber and the second reinforcing fiber, electricity caused by lightning is not left damaged in the first composite material 11 and the second composite material 12. Therefore, it can be assumed that appropriate lightning protection measures have been taken.
  • the low-conductive material 13 can conduct
  • the composite material structure 10 may further include an insulating adhesive layer 15 as shown in FIGS. 1 and 2.
  • the insulating adhesive layer 15 is a layer formed of an adhesive having electrical insulation, and includes a plane of the flange portion of the first composite material 11 and one plane of the second composite material 12 facing each other. By bonding, the first composite material 11 and the second composite material 12 are integrated. Even when the composite material structure 10 further includes the insulating adhesive layer 15, the composite material structure 10 has the low-conductive material 13 having the above-described structure, so that the dielectric breakdown is prevented from occurring in the insulating adhesive layer 15. It can suppress that a lot of heat generate
  • the composite material structure 10 is bonded to the first composite material 11 and the second composite material 12 by the insulating adhesive layer 15, thereby reducing the cost and reducing the weight of the entire structure. Even in such a case, an appropriate lightning protection measure can be taken.
  • the first composite material 11 and the second composite material 12 are integrated by the insulating adhesive layer 15 in the first embodiment, but the present invention is not limited to this.
  • the first composite material 11 and the second composite material 12 may be bonded and integrated by a reaction such as curing of the first resin contained in the first composite material 11 or the second resin contained in the second composite material 12. Good.
  • the low conductive material 13 can suppress the dielectric breakdown of the bonded portion between the first composite material 11 and the second composite material 12.
  • the composite material structure 10 may further include a bolt 16a and a nut 16b as shown in FIGS.
  • the bolt 16a and the nut 16b are included.
  • the present invention is not limited to this, and the bolt 16a and the nut 16b may not be included.
  • a fastener may be used instead of the bolt 16a, and a collar may be used instead of the nut 16b.
  • the bolt 16 a is provided through the through hole 11 a of the first composite material 11.
  • the bolt 16 a may have conductivity, and the surfaces in all directions facing the first composite material 11 are covered with the low conductive material 13. That is, the low conductive material 13 is provided so as to form a sleeve substantially covering the bolt 16a in the region 13b.
  • the composite material structure 10 is also provided with appropriate lightning protection measures even when it is necessary to provide the bolt 16a and the nut 16b due to the strength, the manufacturing method, and the like. Can do.
  • FIG. 3 is a flowchart showing a method of manufacturing the composite material structure 10 according to the first embodiment.
  • the manufacturing method of the composite material structure 10 according to the first embodiment includes a first composite material preparation step S11, a second composite material preparation step S12, and a low conductive material installation step S13. ,including.
  • the first composite material preparation step S11 is a step of preparing the first composite material 11.
  • the first reinforcing fiber is impregnated with the first resin and molded, and further, the through hole 11a is formed to obtain the first composite material 11 in which the first resin is semi-cured.
  • the first reinforcing fiber is impregnated with the first resin, the sheets molded by impregnating the first resin are laminated, and the through hole 11a is formed, thereby forming the first resin.
  • a semi-cured first composite material 11 may be obtained.
  • the second composite material preparation step S12 is a step of preparing the second composite material 12.
  • the second reinforcing fiber is impregnated with the second resin and molded to obtain the second composite material 12 in which the second resin is semi-cured.
  • the second resin is impregnated with the second resin, and a sheet formed by impregnating the second resin is laminated, so that the second composite is in a semi-cured state. Material 12 may be obtained.
  • Low conductive material installation step S13 is a step of electrically connecting the first reinforcing fiber and the second reinforcing fiber by installing the low conductive material 13.
  • the low conductive material installation step S ⁇ b> 13 according to the first embodiment first, the low conductive material 13 is formed into a predetermined shape, and the region 13 b of the low conductive material 13 is penetrated through the first composite material 11. It is formed into a sleeve shape that is inserted into and fitted into the hole 11a and is fitted into the bolt 16a.
  • the region 13c of the low-conductive material 13 is embedded in the embedded portion 12a of the second composite material 12 and then co-cured (Co-Cure). In the region 13c, the low conductive material 13 and the second reinforcing fiber are electrically connected.
  • the first composite material 11 and the second composite material are combined. It is preferable to form the insulating adhesive layer 15 by applying and solidifying an adhesive having electrical insulation on the surfaces facing the material 12.
  • the low conductive material installation step S13 after that, by inserting the portion of the region 13b of the low conductive material 13 formed in a sleeve shape into the through hole 11a of the first composite material 11, By embedding the region 13b of the low conductive material 13 in the through hole 11a of the first composite material 11, the low conductive material 13 and the first reinforcing fiber are electrically connected in the region 13b. Then, the bolt 16a is inserted into the region 13b of the low conductive material 13 formed in the sleeve shape, and tightened with the nut 16b from the side opposite to the side where the bolt 16a is inserted, thereby forming the low conductive material formed in the sleeve shape.
  • the region 13b of the conductive material 13 is fastened with bolts 16a and nuts 16b to be fixed inside the through hole 11a.
  • the mechanical integration process between the first composite material 11 and the second composite material 12 and the electrical connection process between the first composite material 11 or the second composite material 12 and the low-conductive material 13 are: It is not always necessary to carry out in the above order, and the order of carrying out may be changed as appropriate.
  • the first reinforcing fiber impregnated with the first resin and the second reinforcing fiber impregnated with the second resin are formed by the low conductive material installation step S13. Between the first composite material 11 and the second resin because the electrical resistance is lower than that of the first resin and the second resin, and the first conductive fiber and the second conductive fiber are used to conduct electricity. (2) It is possible to flow the composite material 12 in an appropriate range that does not leave any damage, and it is possible to obtain the composite material structure 10 with appropriate lightning protection measures.
  • FIG. 4 is a perspective view showing a composite material structure 20 according to the second embodiment.
  • 5 is a cross-sectional view taken along the line BB of FIG.
  • the composite material structure 20 according to the second embodiment is obtained by changing the installation form of the low conductive material 13 in the composite material structure 10 according to the first embodiment. Since the other structure of the composite material structure 20 is the same as that of the composite material structure 10, detailed description thereof is omitted.
  • each component is different from the description of the composite material structure 10 according to the first embodiment in the specification and the drawings.
  • the code is used.
  • the configurations corresponding to the first composite material 11, the second composite material 12, the low conductive material 13, and the insulating adhesive layer 15 in the composite material structure 10 are respectively
  • the first composite material 21, the second composite material 22, the low conductive material 23, and the insulating adhesive layer 25 are provided.
  • the composite material structure 20 includes a first composite material 21, a second composite material 22, and a low conductive material 23.
  • the first composite material 21 is provided with a first exposed portion 21a in the first composite material 11 instead of the through hole 11a.
  • the first exposed portion 21 a is a portion where the first reinforcing fibers contained in the first composite material 21 are exposed on the surface of the first composite material 21, that is, the first reinforcing fibers from the surface side of the first composite material 21. It is the part from which the 1st resin which covered the is removed.
  • the first exposed portion 21 a is adjacent to a region where the second composite material 22 of the first composite material 21 is provided on the surface opposite to the side facing the second composite material 22.
  • the first exposed portion 21a is formed by subjecting this region of the first composite material 21 to blasting such as sanding.
  • the other components of the first composite material 21 are the same as those of the first composite material 11.
  • the second composite material 22 is provided with a second exposed portion 22a in the second composite material 12 instead of the embedded portion 12a.
  • the second exposed portion 22a is a portion where the second reinforcing fiber contained in the second composite material 22 is exposed on the surface of the second composite material 22, that is, the second reinforcing fiber from the surface side of the second composite material 22. This is a portion where the second resin covering the surface is removed. As shown in FIG. 5, the second exposed portion 22 a is adjacent to a region where the first composite material 21 of the second composite material 22 is provided on the surface facing the flange portion of the first composite material 21.
  • a predetermined region that is, a region adjacent to the first exposed portion 21a when viewed from the first composite material 21 side in the direction in which the first composite material 21 and the second composite material 22 face each other. Similar to the first exposed portion 21a, the second exposed portion 22a is formed by subjecting this region of the second composite material 22 to blasting such as sanding.
  • the other components of the second composite material 22 are the same as those of the second composite material 12.
  • the low conductive material 23 has the same physical properties as the low conductive material 13, and the same material is used, but is installed in a different structure from the low conductive material 13. As shown in FIGS. 4 and 5, the low conductive material 23 includes a region 23 a, a region 23 b, and a region 23 c, similarly to the low conductive material 13.
  • the region 23a is a portion that is not in contact with either the first reinforcing fiber or the second reinforcing fiber.
  • the region 23a is a region between the region 23b and the region 23c, and extends in a direction in which the first composite material 21 and the second composite material 22 face each other and contacts the side surface of the first composite material 21. Has been placed.
  • the region 23b is a region at one end of the low conductive material 23 and is a portion adjacent to one side of the region 23a.
  • the region 23b is a portion that is provided in contact with the first exposed portion 21a and is in contact with the first reinforcing fiber and is electrically connected to the first reinforcing fiber.
  • the region 23c is a region on the other end of the low conductive material 23 and is a portion adjacent to the other side of the region 23a.
  • the region 23c is a portion that is provided in contact with the second exposed portion 22a and is in contact with the second reinforcing fiber and is electrically connected to the second reinforcing fiber.
  • the composite material structure 20 has a configuration in which the bolt 16a and the nut 16b are not provided in accordance with a change in the installation mode of the low conductive material 13 in the composite material structure 10 according to the first embodiment. Yes.
  • the composite material structure 20 includes the low-conductive material 23 having such a structure, the same effect as the composite material structure 10 including the low-conductive material 13 described above can be obtained.
  • the manufacturing method of the composite material structure 20 according to the second embodiment includes the first composite material preparation step S11, the second composite material preparation step S12, and the manufacturing method of the composite material structure 10 according to the first embodiment.
  • the low conductive material installation step S13 is changed.
  • the first exposed portion 21a is formed instead of forming the through hole 11a in the first composite material preparation step S11 according to the first embodiment. It is.
  • the first reinforcing fiber is impregnated with the first resin and molded, and then a predetermined region is subjected to a blasting process such as sanding. The first composite material 21 is obtained.
  • the second composite material preparation step S12 according to the second embodiment forms the second exposed portion 22a instead of forming the embedded portion 12a in the second composite material preparation step S12 according to the first embodiment. It is.
  • the second reinforcing fiber is impregnated with the second resin and molded, and then a predetermined region is subjected to blasting such as sanding.
  • the second composite material 22 is obtained.
  • an adhesive having electrical insulation is applied to the surfaces of the first composite material 11 and the second composite material 12 facing each other before the low conductive material installation step S13. It is preferable to form the insulating adhesive layer 25 by solidifying.
  • the low conductive material 23 is installed instead of the low conductive material 13 in the low conductive material installation step S13 according to the first embodiment. Is.
  • the low conductive material installation step S13 according to the second embodiment first, similarly to the low conductive material installation step S13 according to the first embodiment, the low conductive material 23 is formed into a predetermined shape.
  • the region 23b of the low conductive material 23 is then placed in contact with the first exposed portion 21a formed in the first composite material 21, and the first (2)
  • the region 23c of the low-conductive material 23 is disposed in contact with the second exposed portion 22a formed in the composite material 22.
  • the low conductive material 23 that electrically connects the first reinforcing fiber and the second reinforcing fiber is installed.
  • FIG. 6 is a perspective view showing a composite material structure 30 according to the third embodiment.
  • 7 is a cross-sectional view taken along the line CC of FIG.
  • the composite material structure 30 according to the third embodiment is similar to the composite material structure 20 according to the second embodiment, in the composite material structure 10 according to the first embodiment.
  • the installation form has been changed.
  • the other structure of the composite material structure 30 is the same as that of the composite material structure 10, and a detailed description thereof will be omitted.
  • each component is different from the description of the composite material structure 10 according to the first embodiment in the specification and the drawings.
  • the code is used.
  • the configurations corresponding to the first composite material 11, the second composite material 12, the low conductive material 13, and the insulating adhesive layer 15 in the composite material structure 10 are respectively
  • the first composite material 31, the second composite material 32, the low conductive material 33, and the insulating adhesive layer 35 are provided.
  • the first composite material 31 and the second composite material 32 are made up of a fastener 36a and a collar 36b, which will be described later, for convenience due to strength, a manufacturing method, and the like. Even when it is necessary to integrate them, it is a form that makes it possible to take appropriate lightning protection measures similar to those of the composite material structure 10 according to the first embodiment.
  • the composite material structure 30 includes a first composite material 31, a second composite material 32, and a low conductive material 33. As shown in FIGS. 6 and 7, the composite material structure 30 may further include a fastener 36 a and a collar 36 b that integrate the first composite material 31 and the second composite material 32. In the third embodiment, the fastener 36a and the collar 36b are included. However, the present invention is not limited to this, and the fastener 36a and the collar 36b may not be included. Moreover, a bolt may be used instead of the fastener 36a, and a nut may be used instead of the collar 36b.
  • the first composite material 31 is provided with a through hole 31a instead of the through hole 11a in the first composite material 11. Unlike the through-hole 11a, the through-hole 31a is provided not in the web part but in a plate-like flange part provided to face one plane of the second composite material 32. The other components of the first composite material 31 are the same as those of the first composite material 11.
  • the second composite material 32 is provided with a through hole 32a in the second composite material 12 instead of the embedded portion 12a.
  • the through hole 32a is provided at a position communicating with the above-described through hole 31a when the first composite material 31 is disposed at a position where the first composite material 31 is joined to the second composite material 32.
  • the other components of the second composite material 32 are the same as those of the second composite material 12.
  • the low-conductive material 33 has the same physical properties as the low-conductive material 13 and the same material is used. However, the low-conductive material 33 is installed in a different structure from the low-conductive material 13. As shown in FIGS. 6 and 7, the low conductive material 33 includes a region 33 a, a region 33 b, and a region 33 c.
  • the region 33a is a portion that is not in contact with either the first reinforcing fiber or the second reinforcing fiber.
  • the region 33a is a region between the region 33b and the region 33c, and is disposed so as to extend in a direction in which the first composite material 31 and the second composite material 32 face each other. Note that the region 33a may be omitted.
  • the region 33b is a region at one end of the low conductive material 33 and is a portion adjacent to one side of the region 33a.
  • the region 33b is a portion that contacts the first reinforcing fiber and is electrically connected to the first reinforcing fiber by being embedded in the first resin in the through hole 31a.
  • the region 33c is a region at the other end of the low conductive material 33 and is a portion adjacent to the other side of the region 33a.
  • the region 33c is a portion that contacts the second reinforcing fiber and is electrically connected to the second reinforcing fiber by being embedded in the second resin in the through hole 32a.
  • Fasteners 36 a are provided through the through holes 31 a of the first composite material 31 and the through holes 32 a of the second composite material 32.
  • the fastener 36 a may have conductivity, and the surface in all directions facing the first composite material 31 and the surface in all directions facing the second composite material 32 are low-conductive materials 33. Covered by. That is, the low conductive material 33 is provided so as to form a sleeve substantially covering the fastener 36a.
  • the low-conductivity material 33 formed in a sleeve shape is fastened by a fastener 36a and a collar 36b and is fixed inside the through hole 31a and the through hole 32a.
  • the composite material structure 30 can Since the structure has the low conductive material 33, excessive current flows through the fastener 36a and the collar 36b to generate excessive Joule heat, or the fastener 36a and the collar 36b flow into the internal structure.
  • appropriate lightning protection measures are taken as in the places where the bolts 16a and nuts 16b are provided. Can be.
  • the composite material structure 30 includes the low conductive material 33 having such a structure, the same effect as the composite material structure 10 including the low conductive material 13 described above can be obtained.
  • the composite material structure 30 may further include an insulating adhesive layer 35 similar to the insulating adhesive layer 15 as shown in FIGS. 6 and 7.
  • the layer 35 may not be included. Even when the composite material structure 30 is reduced in cost and the weight of the entire structure is reduced by bonding the first composite material 31 and the second composite material 32 with the insulating adhesive layer 35, Even if it is necessary to integrate the first composite material 31 and the second composite material 32 only by the fastener 36a and the collar 36b without providing the insulating adhesive layer 35 for the convenience of design, the composite material structure 10 The same operational effects as those described above can be obtained.
  • the manufacturing method of the composite material structure 30 according to the third embodiment includes the first composite material preparation step S11, the second composite material preparation step S12, and the manufacturing method of the composite material structure 10 according to the first embodiment.
  • the low conductive material installation step S13 is changed.
  • the through hole 31a is formed.
  • the through hole 32a is formed in the second composite material preparation step S12 according to the third embodiment.
  • the second composite material preparation step S12 according to the third embodiment specifically, by forming the second reinforcing fiber impregnated with the second resin and then forming the through hole 32a in a predetermined region, A second composite material 32 is obtained.
  • the low conductive material 33 is installed instead of the low conductive material 13 in the low conductive material installation step S13 according to the first embodiment. Is.
  • the low conductive material installation step S13 according to the third embodiment first, similarly to the low conductive material installation step S13 according to the first embodiment, the low conductive material 33 is covered with the sleeve that covers the side surface of the fastener 36a. To form.
  • the low-conductive material installation step S13 according to the third embodiment the low-conductive material 33 formed in a sleeve shape is then replaced with the through-hole 31a of the first composite material 31 and the through-hole of the second composite material 32.
  • the first reinforcing fiber and the second reinforcing fiber are electrically connected by being provided so as to penetrate through 32a. Then, the fastener 36a is inserted into the low-conductivity material 33 formed in the sleeve shape, and the collar 36b is tightened from the opposite side to the side where the fastener 36a is inserted, so that the low-conductivity material 33 formed in the sleeve shape is fastened.
  • the first composite material 31 and the second composite material 32 are integrated together while being fastened by 36a and a collar 36b and fixed inside the through hole 31a and the through hole 32a.
  • the low conductive material 33 that electrically connects the first reinforcing fiber and the second reinforcing fiber is installed.
  • the low-conductivity material 33 formed in the sleeve shape is passed through the through hole 31a of the first composite material 31 and the through hole 32a of the second composite material 32 before passing through the first
  • the insulating adhesive layer 35 may be formed by applying and solidifying an adhesive having electrical insulation on the surfaces where the composite material 31 and the second composite material 32 face each other.
  • FIG. 8 is a perspective view showing a composite material structure 40 according to the fourth embodiment.
  • 9 is a cross-sectional view taken along the line DD of FIG.
  • the composite material structure 40 according to the fourth embodiment is related to the first embodiment, similarly to the composite material structure 20 according to the second embodiment and the composite material structure 30 according to the third embodiment.
  • the installation form of the low conductive material 13 is changed.
  • the other structure of the composite material structure 40 is the same as that of the composite material structure 10, and a detailed description thereof will be omitted.
  • each component is different from the description of the composite material structure 10 according to the first embodiment in the specification and the drawings.
  • the code is used. Specifically, in the composite material structure 40, the configurations corresponding to the first composite material 11, the second composite material 12, the low conductive material 13, and the insulating adhesive layer 15, respectively, in the composite material structure 10.
  • the first composite material 41, the second composite material 42, the low conductive material 43, and the insulating adhesive layer 45 are provided.
  • the composite material structure 40 includes a first composite material 41, a second composite material 42, and a low conductive material 43.
  • the first composite material 41 is provided with an embedded portion 41a in which a low-conductive material 43, which will be described later, is embedded in the first composite material 11 in place of the through-hole 11a.
  • the main component is changed to a thermoplastic resin.
  • the thermoplastic resin that is the main component of the first resin contained in the first composite material 41 is listed as an example of a thermoplastic resin that may be mixed with the first resin contained in the first composite material 11. Those are preferably used. Further, the first resin contained in the first composite material 41 may be mixed with a thermosetting resin and other resins in addition to the thermoplastic resin.
  • the embedded portion 41 a is adjacent to a region where the second composite material 42 of the first composite material 41 is provided on a surface opposite to the side facing the second composite material 42. This region is provided in a region adjacent to a buried portion 42a, which will be described later, when viewed from the first composite material 41 side in the direction in which the first composite material 41 and the second composite material 42 face each other.
  • the embedded portion 41a is a portion in which the low-conductive material 43 is embedded using the softness of the first resin whose main component is a thermoplastic resin.
  • the other components of the first composite material 41 are the same as those of the first composite material 11.
  • the second composite material 42 is provided with a buried portion 42a in which a low-conductive material 43 (described later) is buried in place of the buried portion 12a in the second composite material 12, and the second resin contained therein is a thermosetting main component. Instead of the resin, the main component is changed to a thermoplastic resin.
  • the second resin contained in the second composite material 42 those listed as examples of the first resin contained in the first composite material 41 are preferably used.
  • the embedded portion 42 a is a predetermined adjacent to the region where the first composite material 41 of the second composite material 42 is provided on the surface facing the flange portion of the first composite material 41. It is provided in a region, that is, a region adjacent to the embedded portion 41a when viewed from the first composite material 41 side in the direction in which the first composite material 41 and the second composite material 42 face each other.
  • the embedded portion 42a is a portion in which the low-conductive material 43 is embedded using the softness of the second resin whose main component is a thermoplastic resin.
  • the other components of the second composite material 42 are the same as those of the second composite material 12.
  • the low conductive material 43 has the same physical properties as the low conductive material 13, and the same material is used, but is installed in a different structure from the low conductive material 13. As shown in FIGS. 8 and 9, the low conductive material 43 includes a region 43 a, a region 43 b, and a region 43 c, similar to the low conductive material 13.
  • the region 43a is a portion that is not in contact with either the first reinforcing fiber or the second reinforcing fiber.
  • the region 43a is a region between the region 43b and the region 43c, and extends in a direction in which the first composite material 41 and the second composite material 42 face each other and contacts the side surface of the first composite material 41. Has been placed.
  • the region 43b is a region at one end of the low conductive material 43 and is a portion adjacent to one side of the region 43a.
  • the region 43b is a portion that contacts the first reinforcing fiber and is electrically connected to the first reinforcing fiber by being embedded in the first resin in the embedded portion 41a.
  • the region 43c is a region on the other end of the low conductive material 43, and is a portion adjacent to the other side of the region 43a.
  • the region 43c is a portion that contacts the second reinforcing fiber and is electrically connected to the second reinforcing fiber by being embedded in the second resin in the embedded portion 42a.
  • the composite material structure 40 includes bolts 16 a and nuts 16 b, as the installation mode of the low conductive material 13 is changed in the composite material structure 10 according to the first embodiment. No form is provided.
  • the composite material structure 40 includes the low-conductive material 43 having such a structure, the same effect as the composite material structure 10 including the low-conductive material 13 described above is achieved.
  • the manufacturing method of the composite material structure 40 according to the fourth embodiment includes a first composite material preparation step S11, a second composite material preparation step S12, and a manufacturing method of the composite material structure 10 according to the first embodiment.
  • the low conductive material installation step S13 is changed.
  • the embedded portion 41a is formed.
  • the first composite material is formed by impregnating the first reinforcing fiber with the first resin whose main component is a thermoplastic resin. 41 is obtained.
  • the second composite material preparation step S12 according to the fourth embodiment is to form the embedded portion 42a instead of forming the embedded portion 12a in the second composite material preparation step S12 according to the first embodiment. .
  • the second composite material is formed by impregnating the second reinforcing fiber with the second resin whose main component is a thermoplastic resin. 42 is obtained.
  • the first composite material 41 and the second composite material 42 are solidified by applying an electrical insulating adhesive to the surfaces facing each other.
  • the insulating adhesive layer 45 is formed.
  • the low conductive material 43 is installed instead of the low conductive material 13 in the low conductive material installation step S13 according to the first embodiment. Is.
  • the low conductive material installation step S13 according to the fourth embodiment first, similarly to the low conductive material installation step S13 according to the first embodiment, the low conductive material 43 is formed into a predetermined shape.
  • the region 43b of the low conductive material 43 is embedded in the embedded portion 41a of the first composite material 41.
  • the region 43c of the low conductive material 43 is buried in the buried portion 42a of the second composite material 42 and arranged. In this manner, in the low conductive material installation step S13 according to the fourth embodiment, the low conductive material 43 that electrically connects the first reinforcing fiber and the second reinforcing fiber is installed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Laminated Bodies (AREA)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)
PCT/JP2019/002114 2018-03-20 2019-01-23 複合材料構造体及び複合材料構造体の製造方法 Ceased WO2019181184A1 (ja)

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US16/981,565 US11763958B2 (en) 2018-03-20 2019-01-23 Composite material structure and method for manufacturing composite material structure
EP19770413.3A EP3769962A4 (en) 2018-03-20 2019-01-23 COMPOSITE STRUCTURE AND METHOD FOR MANUFACTURING A COMPOSITE STRUCTURE

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JP7511354B2 (ja) * 2020-02-12 2024-07-05 三菱重工業株式会社 複合材料構造体
JP7612498B2 (ja) 2021-04-19 2025-01-14 三菱重工業株式会社 複合材料構造体

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US4891732A (en) * 1986-11-28 1990-01-02 British Aerospace Plc Anti-lightning strike fasteners for composite material aircraft structures
JP2005512319A (ja) * 2001-12-03 2005-04-28 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー 電気導電率を有する搬送部材およびその製造方法
JP2007301838A (ja) * 2006-05-11 2007-11-22 Fuji Heavy Ind Ltd ３次元繊維強化樹脂複合材
US20110031350A1 (en) * 2009-06-09 2011-02-10 Airbus Operations Gmbh Componet, in particular a shell component, which can be joined thermally and/or mechanically, for building a fuselage section of an aircraft
JP2012006528A (ja) * 2010-06-28 2012-01-12 Fuji Heavy Ind Ltd 航空機の機体構造用積層複合材料及び航空機の機体構造
US8854787B2 (en) 2010-08-20 2014-10-07 Airbus Operations Limited Bond lead
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EP3769962A4 (en) 2021-10-13
JP2019162823A (ja) 2019-09-26
EP3769962A1 (en) 2021-01-27
JP7093655B2 (ja) 2022-06-30
US11763958B2 (en) 2023-09-19

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