Fastener means and joint for laminates

Details Fastener means and joint for laminates Fastener means and joint for laminates

1979-07-23

1981-01-13

Kee Chi, James

Joints and connections

Rod end to transverse side of member

Radially interposed, side-engaging shim or bushing

403279, 403388, F16B 900

Patent

active

042446619

ABSTRACT:
A galvanically compatible flanged sleeve is inserted within a close fitting hole in a structural joint wherein at least one of the structural members is a composite laminate. The sleeve is then expanded outwardly into a high interference fit by the insertion of a fastener therethrough. The sleeve may be of the split type and when such is used, a washer can be provided underneath the flange to prevent damage to the underlying laminate surface. Teflon coated shims may be placed between the mating surfaces of the adjacent structural members heldtogether by the joint when the stress excursions are to be applied to high levels and/or with frequency. Joints so formed of graphite/epoxy laminate have fatigue strengths approaching the ultimate static strength of the joint.

REFERENCES:
patent: 2500909 (1950-03-01), Winby
patent: 3222449 (1967-05-01), Becker
patent: 3271058 (1966-09-01), Anderson
patent: 3298725 (1967-01-01), Boteler
patent: 3949535 (1976-04-01), King
patent: 3962843 (1976-06-01), King
patent: 4076430 (1978-02-01), Crook

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