EP0089953A4 - Befestigungsvorrichtung und verfahren für kompositstrukturen. - Google Patents

Befestigungsvorrichtung und verfahren für kompositstrukturen.

Info

Publication number
EP0089953A4
EP0089953A4 EP19820900055 EP82900055A EP0089953A4 EP 0089953 A4 EP0089953 A4 EP 0089953A4 EP 19820900055 EP19820900055 EP 19820900055 EP 82900055 A EP82900055 A EP 82900055A EP 0089953 A4 EP0089953 A4 EP 0089953A4
Authority
EP
European Patent Office
Prior art keywords
fastener
electrically conductive
composite structure
conically shaped
central axis
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.)
Granted
Application number
EP19820900055
Other languages
English (en)
French (fr)
Other versions
EP0089953A1 (de
EP0089953B1 (de
Inventor
Glenn Oliver Olson
Leland Edward Thomson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boeing Co
Original Assignee
Boeing Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Boeing Co filed Critical Boeing Co
Publication of EP0089953A1 publication Critical patent/EP0089953A1/de
Publication of EP0089953A4 publication Critical patent/EP0089953A4/de
Application granted granted Critical
Publication of EP0089953B1 publication Critical patent/EP0089953B1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/16—Fastening of connecting parts to base or case; Insulating connecting parts from base or case

Definitions

  • This invention relates to fastener arrangements for composite structures and more particularly to methods and associated fastener arrangements for establishing electrical continuity between fasteners and composite structures.
  • FIGURE 1 is illustrative of prior art fastener connection installed in a composite panel structure
  • FIGURE 2 is a sectional view illustrative of an apparatus and method in accordance with a preferred embodiment of the present invention for providing increased conductivity between fastener and composite structure;
  • FIGURE 3 is a view of the assembly of Figure 2 blown apart to show the manner of assembly of the fastener arrangement of Figure 2;
  • FIGURE 4 is an expanded and enlarged view of the crosssection of the present fastener assembly shown in Figure 2 deemed helpful in understanding the manner in which increased conductivity is achieved,
  • the stud assembly indicated generally by the numeral 10 includes a bolt having a head portion 14 and a shank portion 16 passing through the composite panel structure 12, The usual washers and locking nut 18 complete the assembly of grounding stud 10 to composite panel structure 12.
  • countersunk insert device 22 comprises a generally tubular shaped body of corrosion resistant stainless steel or titanium having two continuous integral coaxial portions 30 and 32 disposed about the central axis 40 of the fastener 10 shown in place in Figure 4.
  • Countersunk insert device 22, being of tubular shape about coaxial hole 31 comprises an upper frustro conical shaped portion 30 and a lower cylindrically shaped flange-like portion 32.
  • Graphite epoxy structures such as panel member 12 shown in Figure 4 have much better conductivity in a longitudinal direction (the current flow stays in the plies), than in the transverse direction, such as in the direction 40 along the central axis of a fastener inserted in the graphite epoxy structure.
  • the reason for this is that the currents must cross, the epoxy boundary between plies and run transverse to the graphite filaments which lie along the longitudinal direction 42 of current flow within the graphite epoxy structure 12.
  • This difference in conductivity can be as high as 200:1.
  • the countersunk insert devices 20 and 22 in accordance with a preferred embodiment of the present invention provide the increased conductivity between shank of a fastener, such as the grounding stud 20 shown in Figure 4, and the longitudinal fibers of the conductive structure running in the direction of current flow represented by the numerals 42 in Figure 4.
  • edge-to-edge resistivity is approximately 200;1 for a graphite epoxy type composite structure 12.
  • resistivity of graphite epoxy composite structures varies from 10 3 to 10 6 that of an equivalent aluminum sheet. Therefore, the optimum bonding and ground resistance for a fastener such as a ground stud 20 shown in Figure 4 in a composite panel structure 12 can be successfully realized by utilization of countersunk insert devices 20 and 22 which provide electrical contact between shaft portion 16 of a fastener and an increased number of the longitudinal fibers of the composite structure 12. This is due to the frustro conical shaped portion 30 of countersunk insert 22. Transverse conductivity is also improved between the faying surface of countersunk insert device 22 and the outer plies of composite structure 12.
  • Countersunk insert device 20 is shaped identical to countersunk insert device 22 hereinbefore described, and is located in a complementary-shaped countersunk hole on the other side of composite structure 12,
  • the hereinabove described embodiment of the present invention teaches a method and structures including the utilization of countersunk insert devices which, will achieve the maximum transfer of currents between the shanks of fastening deyices and transversely extending fibers in composite panel structures in which, fasteners are utilized.
  • the longitudinal conductivity property of these advanced composites such as graphite epoxy composites may be utilized in accordance with further embodiments of the invention by those skilled in the art, recognizing that the aforementioned countersunk insert devices may be utilized where, for example, fasteners such as self-locking nuts, shear collars, fixed nut plates or floating nut plates are utilized.
  • the present countersunk insert devices may be utilized on either side of a pair of composite panel members being secured together by standard types of fasteners having shank portions 16 which must be connected to longitudinally extending fibers in the composite panel members utilizing the increase conductivity teachings of the preferred embodiment of the present invention.

Landscapes

  • Connection Of Plates (AREA)
  • Laminated Bodies (AREA)
  • Moulding By Coating Moulds (AREA)
EP82900055A 1981-09-30 1981-09-30 Befestigungsvorrichtung und verfahren für kompositstrukturen Expired EP0089953B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1981/001318 WO1983001345A1 (en) 1981-09-30 1981-09-30 Fastening device and method for composite structures

Publications (3)

Publication Number Publication Date
EP0089953A1 EP0089953A1 (de) 1983-10-05
EP0089953A4 true EP0089953A4 (de) 1985-11-07
EP0089953B1 EP0089953B1 (de) 1988-06-22

Family

ID=22161454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82900055A Expired EP0089953B1 (de) 1981-09-30 1981-09-30 Befestigungsvorrichtung und verfahren für kompositstrukturen

Country Status (3)

Country Link
EP (1) EP0089953B1 (de)
DE (1) DE3176798D1 (de)
WO (1) WO1983001345A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006069997A1 (en) * 2004-12-30 2006-07-06 Airbus España, S.L. Device for electrical bonding of electrical cables shielding on composite structures
DE102016117835A1 (de) * 2016-09-21 2018-04-05 Lisa Dräxlmaier GmbH Elektrische Verbindungsanordnung und Verfahren zum Herstellen einer elektrischen Verbindungsanordnung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1083447A (fr) * 1953-02-27 1955-01-10 Boulon indesserrable
DE1020782B (de) * 1954-12-24 1957-12-12 Brueninghaus Gmbh Stahlwerke Geschraubter Stabanschluss in Fachwerken
US2990533A (en) * 1958-04-09 1961-06-27 Stokes D Hughes Terminal post for circuit board
DE2134605A1 (de) * 1970-07-17 1972-01-27 Nuclear Power Group Ltd Klemmverbindung für unterschiedlicher thermischer Ausdehnung ausgesetzte Körper
FR2265194A1 (de) * 1974-03-21 1975-10-17 Boeing Co
DE2651262A1 (de) * 1976-11-10 1978-05-11 Audi Nsu Auto Union Ag Schraubenverbindung von maschinenteilen
US4110904A (en) * 1977-05-19 1978-09-05 Allen-Bradley Company Substrate with terminal connections and method of making the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB160218A (en) * 1919-11-14 1921-03-14 British Electric Transformer C Improvements in or relating to electric connections
DE2347217A1 (de) * 1973-09-19 1975-03-27 Siemens Ag Verfahren zum durchkontaktieren eines beidseitig metallkaschierten basismaterials fuer gedruckte schaltungen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1083447A (fr) * 1953-02-27 1955-01-10 Boulon indesserrable
DE1020782B (de) * 1954-12-24 1957-12-12 Brueninghaus Gmbh Stahlwerke Geschraubter Stabanschluss in Fachwerken
US2990533A (en) * 1958-04-09 1961-06-27 Stokes D Hughes Terminal post for circuit board
DE2134605A1 (de) * 1970-07-17 1972-01-27 Nuclear Power Group Ltd Klemmverbindung für unterschiedlicher thermischer Ausdehnung ausgesetzte Körper
FR2265194A1 (de) * 1974-03-21 1975-10-17 Boeing Co
DE2651262A1 (de) * 1976-11-10 1978-05-11 Audi Nsu Auto Union Ag Schraubenverbindung von maschinenteilen
US4110904A (en) * 1977-05-19 1978-09-05 Allen-Bradley Company Substrate with terminal connections and method of making the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8301345A1 *

Also Published As

Publication number Publication date
WO1983001345A1 (en) 1983-04-14
DE3176798D1 (en) 1988-07-28
EP0089953A1 (de) 1983-10-05
EP0089953B1 (de) 1988-06-22

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