Browsing by Keyword "Electrical properties"
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Item Electrical Connectors for Underwater Applications(wiley, 2020-01-01) Remouit, Flore; Engström, Jens; Ruiz-Minguela, Pablo; Ruiz‐Minguela, Pablo; RENOVABLES OFFSHORENowadays, numerous companies offer a large choice of underwater connectors and assemblies, and it can be complex to distinguish the different technologies employed for each of them. This chapter provides an overview of the types of connectors that exist for underwater and subsea electrical connections. It presents different types of commercial-off-the-shelf electrical connectors, and lists their performances and defaults, as well as typical failure modes and their known causes. Although each manufacturer has its own designs and technologies, underwater connectors can be grouped into five main categories: rubber-molded, rigid-shell or bulkhead assemblies, fluid-filled underwater mateable, inductive coupling, and assemblies (non-unmateable). The chapter contains the theory on sealing and on connectors’ thermal, electrical, and mechanical properties. It provides information on connection procedures and other details about connecting subsea cables with a focus on the connection of offshore renewable energy farms.Item Enhancement of electrical conductivity of composite structures by integration of carbon nanotubes via bulk resin and/or buckypaper films(2017-08-01) Gaztelumendi, Idoia; Chapartegui, Maialen; Seddon, Richard; Flórez, Sonia; Pons, François; Cinquin, Jacques; Tecnalia Research & Innovation; POLIMEROSThis study describes two approaches for the incorporation of carbon nanotubes (CNTs) in carbon fibre reinforced polymer (CFRP) composites, through the addition of the CNTs in the bulk resin and by the addition of CNT-based buckypaper (BP) in the CFRP structure. Several laminates were successfully manufactured integrating these two approaches, where a significant improvement of the electrical conductivity (EC) values was found. Additionally, in order to compare different surface preparations and testing methods, a cross check of EC test was carried out among different laboratories. This characterization was complemented with scanning electron microscopy (SEM) analyses, results of which were used to rule out a complete filtering effect of the CNTs. Furthermore, interlaminar shear strength (ILSS) tests were also performed, with the aim of assessing the mechanical behavior of the different configurations.