Fiber-reinforced resin member and method for producing fiber-reinforced resin member

Patent metadata

Field	Value
Publication number	US-10288097-B2
Application number	US-201515501542-A
Country	US
Kind code	B2
Filing date	May 12, 2015
Priority date	Aug 6, 2014
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

A fiber-reinforced resin member is provided in which a non-conductive sleeve and first and second non-conductive sheets are disposed between a metal fastening member and CFRP laminate, electrical continuity between the metal fastening member and the CFRP laminate is cut off, and corrosion of the metal fastening member due to galvanic corrosion is prevented. A first annular space is formed between a first flange portion of a first member and the first non-conductive sheet, a second annular space is formed between a second flange portion of a second member and the second non-conductive sheet. Therefore, even if frayed carbon fiber sticks out from a gap between the non-conductive sleeve and the first and second non-conductive sheets, due to the first and second annular spaces being formed therein, it is possible to prevent the sticking-out carbon fiber from contacting the first and second members and providing electrical continuity.

First claim

The invention claimed is:

1. A fiber-reinforced resin member in which a through hole is machined in a carbon fiber-reinforced plastic (CFRP) laminate comprising a carbon fiber embedded in a resin, and a conductive metal fastening member is mounted in the through hole in an electrically insulated state,
wherein the metal fastening member comprises a first member and a second member, the first member comprising a first flange portion extending along one surface of the CFRP laminate and a first bolt hole extending through the first flange portion, and the second member comprising a second flange portion extending along another surface of the CFRP laminate and a second bolt hole extending through the second flange portion, at least one of the first and second members comprising a collar portion that is inserted into the through hole and abuts against the other one of the first and second members and a third bolt hole that extends through the collar portion and is connected to the first and second bolt holes,
an annular first non-conductive sheet encircling the through hole is held between said one surface of the CFRP laminate and the first flange portion, an annular second non-conductive sheet encircling the through hole is held between the another surface of the CFRP laminate and the second flange portion, and a non-conductive sleeve is disposed between an outer periphery of the collar portion and an inner periphery of the through hole, and
a first annular space encircling an outer periphery of the non-conductive sleeve is formed between the first flange portion and the first non-conductive sheet, and a second annular space encircling the outer periphery of the non-conductive sleeve is formed between the second flange portion and the second non-conductive sheet.

2. The fiber-reinforced resin member according to claim 1 , wherein the collar portion comprises a first collar portion of the first member and a second collar portion of the second member that interlock with each other.

3. The fiber-reinforced resin member according to claim 2 , wherein a component is fixed to the metal fastening member by a bolt that extends through the first to third bolt holes and is screwed into a nut.

4. The fiber-reinforced resin member according to claim 2 , wherein a component is fixed to the metal fastening member by a bolt screwed into a female thread formed in at least part of the first to third bolt holes.

5. The fiber-reinforced resin member according to claim 2 , wherein the first non-conductive sheet, the second non-conductive sheet, and the non-conductive sleeve have a film resistance of greater than 10 6 Ω·cm 2 .

6. The fiber-reinforced resin member according to claim 1 , wherein a component is fixed to the metal fastening member by a bolt that extends through the first to third bolt holes and is screwed into a nut.

7. The fiber-reinforced resin member according to claim 1 , wherein a component is fixed to the metal fastening member by a bolt screwed into a female thread formed in at least part of the first to third bolt holes.

8. The fiber-reinforced resin member according to claim 1 , wherein the first non-conductive sheet, the second non-conductive sheet, and the non-conductive sleeve have a film resistance of greater than 10 6 Ω·cm 2 .

9. A method for producing the fiber-reinforced resin member according to claim 1 , the method comprising
a step of molding the CFRP laminate in a state in which the first and second non-conductive sheets are laminated on opposite faces of a prepreg comprising the carbon fiber,
a step of machining the through hole extending through the CFRP laminate and the first and second non-conductive sheets, and
a step of adhering the non-conductive sleeve and the first and second members so as to cover the through hole.

10. A method for producing the fiber-reinforced resin member according to claim 2 , the method comprising
a step of molding the CFRP laminate in a state in which the first and second non-conductive sheets are laminated on opposite faces of a prepreg comprising the carbon fiber,
a step of machining the through hole extending through the CFRP laminate and the first and second non-conductive sheets, and
a step of adhering the non-conductive sleeve and the first and second members so as to cover the through hole.

Assignees

• Honda Motor Co Ltd

Inventors

• Ayuzawa Shotaro
• Ohta Yoshikatsu

Classifications

• F16B43/001

  for sealing or insulation · CPC title

• B29K2105/0872

  Prepregs · CPC title

• B29C70/06

  Fibrous reinforcements only · CPC title

• B29C70/34

  and shaping or impregnating by compression {, i.e. combined with compressing after the lay-up operation} · CPC title

• F16B5/02 Primary

  by means of fastening members using screw-thread ({F16B5/0004 takes precedence}; construction of screw-threaded connections F16B25/00 - F16B39/00) · CPC title