Accession Number : ADA189118

Title :   Exploratory Evaluation of Alumina Ceramic Cylindrical Housings for Deep Submergence Service: The Second Generation NOSC Ceramic Housings.

Descriptive Note : Final rept. Jun 86-Jan 87,

Corporate Author : NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA

Personal Author(s) : Stachiw, J D ; Held, J L

PDF Url : ADA189118

Report Date : Sep 1987

Pagination or Media Count : 97

Abstract : Scale model ceramic pressure housing assemblies have been designed, fabricated, and pressure-cycled 2,000 times to the 9,000-psi external design pressure without failure. The Model 1 cylinder, fabricated from 99.5-percent alumina ceramic, is 9 inches long and has an inside diameter of 5.624 inches and an outside diameter of 6.00 inches. The Model 2 cylinder, fabricated from 94-percent alumina ceramic, is the same as Model 1 in length and inside diameter, but its outside diameter is 6.037 inches. Each housing assembly was either a single cylinder or two cylinders of the same model joined together. The single cylinder housing assembly consisted of a cylinder and two titanium spherical end closures with a 5.624-inch inside diameter and a 0.136-inch thickness, that provided radial support for the ends of the cylinder. The two-cylinder assemblies were radially supported and joined together by a titanium T-ring in the center, and by titanium spherical end closures at either end od the lengthened cylinder. Fretting of the bearing surfaces on the ends of ceramic cylinders was eliminated by fitting the ends of the cylinders with U-shaped titanium rings held in place by epoxy adhesive. The weight-to-displacement ratio of the pressure housing assembly was 0.57.

Descriptors :   *CERAMIC MATERIALS, *HOUSINGS, ADHESIVES, ALUMINUM OXIDES, ASSEMBLY, CYLINDRICAL BODIES, DEEP SUBMERGENCE, DISPLACEMENT, EPOXY COMPOUNDS, PRESSURE VESSELS, RATIOS, RINGS, TEST AND EVALUATION, TITANIUM, WEIGHT, DEEP SUBMERGENCE VEHICLES, HULLS(MARINE), REMOTELY PILOTED VEHICLES, FATIGUE LIFE, RING STIFFENED CYLINDERS, BUOYANCY, SUBMERSIBLES

Subject Categories : Machinery and Tools
      Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE