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<p>The U.S. Navy has been incorporating increasing amounts of composite materials  during construction, especially in the areas of submarine sails and surface ship  superstructures. The benefit of using composite material with metal wire layers  imbedded is that these metal wire layers may be welded to the steel superstructure of a  Naval Vessel resulting in maximum joint strength. Joining a composite structure to a  metallic structure required the metal-wire layers to be co-cured with composite layers  using the Vacuum Assisted Resin Transfer Molding (VARTM). The interface fracture  strength was measured for Mode I fracture for various lay-up and interface conditions.  The study includes metal-wire to composite, composite to composite, and metal-wire to  metal-wire interfaces. Metal-wire lay-up orientations studied were 0 and 90 degrees with  varying combinations. The study also examined the crack propagation from a composite  to a metal/composite interface. Failure mode was studied by creating a finite element  model in ANSYS 12.0. The results suggested that a metal-wire/composite laminate  would be effective to connect a composite structure to a metallic structure.
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<br>Subjects: Shipbuilding; Naval architecture; Composite materials</div>
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Klopfer, Joseph E.</div>
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