Patent · US11763958B2 · B2 · US

Composite material structure and method for manufacturing composite material structure

(11) Publication number

US11763958B2

(21) Application number

16/981,565

(22) Filing date

2019-01-23

(30) Priority date

2018-03-20

(43) Publication date

2023-09-19

(45) Date of grant

2023-09-19

(51) IPC

B32B 27/08; B32B 7/025; B32B 7/08; B32B 7/12; B64C 1/00; B64D 45/02; F16B 11/00; H01B 1/20; H01B 1/24; H01B 5/00

(52) CPC

H01B Cables; conductors; insulators; selection of materials for their conductive, insulating or dielectric properties: 1/20, 1/24, 5/002
B32B Layered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form: 2250/02, 2250/20, 2250/44, 2260/021, 2260/046, 2262/02, 2262/0269, 2262/101, 2262/103, 2262/106, 2262/14, 2307/202, 2307/206, 2307/302, 2307/304, 2605/08, 2605/12, 2605/18, 27/08, 27/12, 27/18, 3/08, 3/266, 5/06, 5/26, 5/28, 7/025, 7/04, 7/08, 7/12
B64C Aeroplanes; helicopters: 1/00, 2001/0072
B64D Equipment for fitting in or to aircraft; flight suits; parachutes; arrangement or mounting of power plants or propulsion transmissions in aircraft: 45/02
F16B Devices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges; joints or jointing: 11/006

(73) Assignee

Mitsubishi Heavy Industries Ltd

(72) Inventors

Toshiya ARAKI; Tomoo TAKIZAWA; Hiroaki Yamaguchi; Toshinobu MURAKI; Shunsuke YOSHINO

(54) Title

Composite material structure and method for manufacturing composite material structure

(57) Abstract

Provided are a composite material structure obtained by joining composite materials with resin-impregnated reinforcing fibers, for which appropriate lightning proofing measures are taken, and a method for manufacturing the composite material structure. The composite material structure includes a first composite material, a second composite material, and a low-conductivity material. The first composite material includes a conductive first reinforcing fiber and a first resin impregnated into the first reinforcing fiber. The second composite material is integrated with the first composite material, and has a conductive second reinforcing fiber and a second resin impregnated into the second reinforcing fiber. The low-conductivity material has an electrical resistance that is lower than that of the first resin and the second resin and a low conductivity that is greater than or equal to the first reinforcing fiber and the second reinforcing fiber, and electrically connects the first reinforcing fiber to the second reinforcing fiber.

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Claims (6)

A composite material structure comprising: a first composite material having a conductive first reinforcing fiber and a first resin impregnated into the first reinforcing fiber; a second composite material integrated with the first composite material, the second composite material having a conductive second reinforcing fiber and a second resin impregnated into the second reinforcing fiber; and a low-conductivity material having an electrical resistance less than an electrical resistance of the first resin and less than an electrical resistance of the second resin and no less than an electrical resistance of the first reinforcing fiber and no less than an electrical resistance of the second reinforcing fiber, the low-conductivity material electrically connecting the first reinforcing fiber to the second reinforcing fiber; and an electrically-insulating adhesive layer that has electrically-insulating properties and that is configured to integrate the first composite material with the second composite material by adhering a surface of the first composite material and a surface of the second composite material, the surfaces facing each other.
The composite material structure according to claim 1, wherein one end of the low-conductivity material is embedded in the first resin to be electrically connected to the first reinforcing fiber, and the other end is embedded in the second resin to be electrically connected to the second reinforcing fiber.
The composite material structure according to claim 2, wherein both the first resin and the second resin are thermoplastic resins.
The composite material structure according to claim 1, wherein one end of the low-conductivity material is electrically connected to a first exposed portion of the first reinforcing fiber which is exposed on a surface of the first composite material, and the other end is electrically connected to a second exposed portion of the second reinforcing fiber which is exposed on a surface of the second composite material.
The composite material structure according to claim 1, wherein the low-conductivity material includes a low-conductivity sleeve disposed through the first composite material and the second composite material to cover a fastener configured to integrate the first composite material with the second composite material.
A method for manufacturing a composite material structure, the method comprising: a first composite material preparing step of preparing a first composite material having a conductive first reinforcing fiber and a first resin impregnated into the first reinforcing fiber; a second composite material preparing step of preparing a second composite material having a conductive second reinforcing fiber and a second resin impregnated into the second reinforcing fiber; and a low-conductivity material setting step of setting a low-conductivity material having a lower electrical resistance less than an electrical resistance of the first resin and less than an electrical resistance of the second resin and no less than an electrical resistance of the first reinforcing fiber and no less than an electrical resistance of the second reinforcing fiber, the low-conductivity material electrically connecting the first reinforcing fiber to the second reinforcing fiber, and an electrically-insulating adhesive layer setting step of setting an electrically-insulating adhesive layer having electrically-insulating properties to integrate the first composite material with the second composite material by adhering a surface of the first composite material and a surface of the second composite material, the surfaces facing each other.

Description

The present invention relates to a composite material structure and a method for manufacturing the composite material structure.

A composite material with resin-impregnated reinforcing fibers is used for a structure that constitutes an aircraft, an automobile, a vehicle, a marine vessel, or the like. The structure may be formed by joining and integrate composite materials. The composite materials are joined by, for example, adhesion using an adhesive material or the like, fastening using bolts, nuts, and the like.

For a structure in which metal materials are integrated with each other via an insulating material, lightning proofing measures are taken by providing electrical continuity between the integrated metal materials (see Patent Document 1).

Patent Document 1: U.S. Pat. No. 8,854,787

The structure integrated by joining composite materials together, namely the composite material structure, in which even conductive reinforcing fibers may be covered with a non-conductive resin, disadvantageously, cannot thus be subject to the lightning proofing measures described in Patent Document 1.

In light of the foregoing, an object of the present invention is to provide a composite material structure obtained by joining composite materials with resin-impregnated reinforcing fibers, for which appropriate lightning proofing measures are taken, and a method for manufacturing the composite material structure.

Citations (13)

US4891732A
WO2003049157A1
JP2005512319A
JP2007301838A
US20110031350A1
JP2012006528A
US8854787B2
EP3225555A1
US20170284449A1
JP2017185995A
KR20170116470A
US20170314606A1
JP2018021660A

Record as JSON

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  "publication_number": "US11763958B2",
  "country": "US",
  "kind": "B2",
  "title": "Composite material structure and method for manufacturing composite material structure",
  "abstract": "Provided are a composite material structure obtained by joining composite materials with resin-impregnated reinforcing fibers, for which appropriate lightning proofing measures are taken, and a method for manufacturing the composite material structure. The composite material structure includes a first composite material, a second composite material, and a low-conductivity material. The first composite material includes a conductive first reinforcing fiber and a first resin impregnated into the first reinforcing fiber. The second composite material is integrated with the first composite material, and has a conductive second reinforcing fiber and a second resin impregnated into the second reinforcing fiber. The low-conductivity material has an electrical resistance that is lower than that of the first resin and the second resin and a low conductivity that is greater than or equal to the first reinforcing fiber and the second reinforcing fiber, and electrically connects the first reinforcing fiber to the second reinforcing fiber.",
  "claims": [
    "1. A composite material structure comprising: a first composite material having a conductive first reinforcing fiber and a first resin impregnated into the first reinforcing fiber; a second composite material integrated with the first composite material, the second composite material having a conductive second reinforcing fiber and a second resin impregnated into the second reinforcing fiber; and a low-conductivity material having an electrical resistance less than an electrical resistance of the first resin and less than an electrical resistance of the second resin and no less than an electrical resistance of the first reinforcing fiber and no less than an electrical resistance of the second reinforcing fiber, the low-conductivity material electrically connecting the first reinforcing fiber to the second reinforcing fiber; and an electrically-insulating adhesive layer that has electrically-insulating properties and that is configured to integrate the first composite material with the second composite material by adhering a surface of the first composite material and a surface of the second composite material, the surfaces facing each other.",
    "2. The composite material structure according to claim 1, wherein one end of the low-conductivity material is embedded in the first resin to be electrically connected to the first reinforcing fiber, and the other end is embedded in the second resin to be electrically connected to the second reinforcing fiber.",
    "3. The composite material structure according to claim 2, wherein both the first resin and the second resin are thermoplastic resins.",
    "4. The composite material structure according to claim 1, wherein one end of the low-conductivity material is electrically connected to a first exposed portion of the first reinforcing fiber which is exposed on a surface of the first composite material, and the other end is electrically connected to a second exposed portion of the second reinforcing fiber which is exposed on a surface of the second composite material.",
    "5. The composite material structure according to claim 1, wherein the low-conductivity material includes a low-conductivity sleeve disposed through the first composite material and the second composite material to cover a fastener configured to integrate the first composite material with the second composite material.",
    "6. A method for manufacturing a composite material structure, the method comprising: a first composite material preparing step of preparing a first composite material having a conductive first reinforcing fiber and a first resin impregnated into the first reinforcing fiber; a second composite material preparing step of preparing a second composite material having a conductive second reinforcing fiber and a second resin impregnated into the second reinforcing fiber; and a low-conductivity material setting step of setting a low-conductivity material having a lower electrical resistance less than an electrical resistance of the first resin and less than an electrical resistance of the second resin and no less than an electrical resistance of the first reinforcing fiber and no less than an electrical resistance of the second reinforcing fiber, the low-conductivity material electrically connecting the first reinforcing fiber to the second reinforcing fiber, and an electrically-insulating adhesive layer setting step of setting an electrically-insulating adhesive layer having electrically-insulating properties to integrate the first composite material with the second composite material by adhering a surface of the first composite material and a surface of the second composite material, the surfaces facing each other."
  ],
  "description_excerpt": "The present invention relates to a composite material structure and a method for manufacturing the composite material structure.\n\nA composite material with resin-impregnated reinforcing fibers is used for a structure that constitutes an aircraft, an automobile, a vehicle, a marine vessel, or the like. The structure may be formed by joining and integrate composite materials. The composite materials are joined by, for example, adhesion using an adhesive material or the like, fastening using bolts, nuts, and the like.\n\nFor a structure in which metal materials are integrated with each other via an insulating material, lightning proofing measures are taken by providing electrical continuity between the integrated metal materials (see Patent Document 1).\n\nPatent Document 1: U.S. Pat. No. 8,854,787\n\nThe structure integrated by joining composite materials together, namely the composite material structure, in which even conductive reinforcing fibers may be covered with a non-conductive resin, disadvantageously, cannot thus be subject to the lightning proofing measures described in Patent Document 1.\n\nIn light of the foregoing, an object of the present invention is to provide a composite material structure obtained by joining composite materials with resin-impregnated reinforcing fibers, for which appropriate lightning proofing measures are taken, and a method for manufacturing the composite material structure.",
  "cpc": [
    "H01B 1/20",
    "B32B 2250/02",
    "B32B 2250/20",
    "B32B 2250/44",
    "B32B 2260/021",
    "B32B 2260/046",
    "B32B 2262/02",
    "B32B 2262/0269",
    "B32B 2262/101",
    "B32B 2262/103",
    "B32B 2262/106",
    "B32B 2262/14",
    "B32B 2307/202",
    "B32B 2307/206",
    "B32B 2307/302",
    "B32B 2307/304",
    "B32B 2605/08",
    "B32B 2605/12",
    "B32B 2605/18",
    "B32B 27/08",
    "B32B 27/12",
    "B32B 27/18",
    "B32B 3/08",
    "B32B 3/266",
    "B32B 5/06",
    "B32B 5/26",
    "B32B 5/28",
    "B32B 7/025",
    "B32B 7/04",
    "B32B 7/08",
    "B32B 7/12",
    "B64C 1/00",
    "B64C 2001/0072",
    "B64D 45/02",
    "F16B 11/006",
    "H01B 1/24",
    "H01B 5/002"
  ],
  "ipc": [
    "B32B 27/08",
    "B32B 7/025",
    "B32B 7/08",
    "B32B 7/12",
    "B64C 1/00",
    "B64D 45/02",
    "F16B 11/00",
    "H01B 1/20",
    "H01B 1/24",
    "H01B 5/00"
  ],
  "assignees": [
    "Mitsubishi Heavy Industries Ltd"
  ],
  "inventors": [
    "Toshiya ARAKI",
    "Tomoo TAKIZAWA",
    "Hiroaki Yamaguchi",
    "Toshinobu MURAKI",
    "Shunsuke YOSHINO"
  ],
  "filing_date": "2019-01-23",
  "publication_date": "2023-09-19",
  "grant_date": "2023-09-19",
  "priority_date": "2018-03-20",
  "application_number": "US-201916981565-A",
  "family_id": "67986428",
  "cited_by_count": 0,
  "citations": [
    "US4891732A",
    "WO2003049157A1",
    "JP2005512319A",
    "JP2007301838A",
    "US20110031350A1",
    "JP2012006528A",
    "US8854787B2",
    "EP3225555A1",
    "US20170284449A1",
    "JP2017185995A",
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    "US20170314606A1",
    "JP2018021660A"
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}

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