Joints and connections – Diverse material coupling member
Patent
1994-10-17
1996-11-12
Melius, Terry Lee
Joints and connections
Diverse material coupling member
403268, 403225, 403404, F16L 1310
Patent
active
055733441
ABSTRACT:
A design for a high damping composite joint which dissipates vibrations through the use of air gaps and viscoelastic material minimizing the transfer of vibrations to the metallic coupling. Viscoelastic material is used with adhesive to provide for increased energy dissipation by the joint. As the load increases on the joint, the load transfers from adhesive to the viscoelastic. The viscoelastic begins to take the load of the joint at the point where the adhesive becomes plastic. Acoustic vibrations are then dissipated in the viscoelastic and are prevented from being transferred to the metallic coupling by air gaps provided in the joint. The amount of viscoelastic and adhesive used depends on the anticipated load. Finite element analysis is used to calculate optimal amounts of viscoelastic and adhesive.
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Andersen et al "Design of an Energy Absorbing Composite Cylinder Joint for ressure-Hull Applications" Proceedings of the American Society for Composites Eighth Technical Conference Oct. 18-21; 1993 pp. 624-639.
Andersen Stephen M.
Coppens Daniel D.
Crane Roger M.
Gillespie, Jr. John W.
Loup Douglas C.
Kaiser Howard
Melius Terry Lee
Novosad Christopher J.
The United States of America as represented by the Secretary of
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