Accession Number:

ADA282876

Title:

Exploratory Evaluation of Alumina-Ceramic Housings for Deep Submergence Service. Volume 1. Third Generation Housings. Revised

Descriptive Note:

Final rept.

Corporate Author:

NAVAL COMMAND CONTROL AND OCEAN SURVEILLANCE CENTER RDT AND E DIV SAN DIEGO CA

Personal Author(s):

Report Date:

1993-06-01

Pagination or Media Count:

67.0

Abstract:

A test program has been conducted to develop design concepts for assembling large external pressure housings from ceramic cylinders and hemispheres by joining them with removable titanium joint rings and split wedge bands. The proposed design concepts have been validated with 6- and 12-inch- diameter housings assembled from many interchangeable housings components. The test results show that there appears to be no reduction in structural performance under external pressure associated with 1 linear scaling up of ceramic housing components, and 2 the presence of inclusions 0.05 inch in diameter. Weight-to-displacement of 0.6 has been achieved by housings assembled from 94-percent alumina monocoque cylinders and hemispheres designed not to exceed - 150,000 psi compressive stress. The cyclic fatigue life of the ceramic components is determined by the rate of crack growth on the ceramic bearing surfaces under axial bearing loading. The rate of crack growth is minimized by encapsulating the ends of ceramic components in titanium end rings filled with epoxy adhesive.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Machinery and Tools
  • Submarine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE