Design considerations for stretch conductors in oceanographic moorings
1995
Paul, Walter
A copper conductor formed into a helical configuration like a telephone cord can stretch by extending itsgeometry without elongating the conductor itself. This report establishes the proper configuration of copperconductors arranged in a helical pattern around a fiber core which can be used as center of a nylon rope withat least 20 percent working stretch. The calculation procedure allows the determination of the conductor'shelix angle or pitch as function of the required assembly elongation, the cable assembly's geometry, and thefiber core's Poisson ratio. Limits of the geometry are established to assure defined flexibilty of the cableassembly to allow bending of a surrounding fiber rope without conductor layer blockage. A sample stretch conductorassembly was procured and initial testing is described, proving the calculation method's ability todetermine the correct geometry of the conductor assembly. Such conductor assemblies can be used asconductive core of nylon ropes suitable for coastal and deepsea buoy moorings or as lift or trigger lines forinstrumentation. They are also considered the most suitable configuration which can endure the high stretchrequirements of embedded conductors in a stretch hose wall at its transition into a coupling section.
Afficher plus [+] Moins [-]Funding was provided by the Office of Naval Researchthrough Grant No. N00014-94-130346.
Afficher plus [+] Moins [-]Informations bibliographiques
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