Accession Number:

AD0743906

Title:

SCS Glass: A Review of Pressure Fatigue Tests on Jointed Spherical Hulls,

Descriptive Note:

Corporate Author:

NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s):

Report Date:

1972-04-24

Pagination or Media Count:

25.0

Abstract:

A review was made of the behavior of about 150 buoyant, spherical hulls and models for deep ocean use comprising glass or glass-ceramic hemispheres with metal joint rings, as designed and tested in four laboratories under cyclic-pressure fatigue conditions. A great variety of surface-compression strengthened SCS glass, unstrengthened glass and unstrengthened glass-ceramic was used. A variety of designs, alloys and interface materials, e.g., oils, greases, plastics, reinforced plastics or rubbers were used. In all models which survived 2500 cycles of external pressure the bending strength of the SCS glass exceeded the maximum compression stress in the butt joints. Prematures failures occurred when the bending strength was significantly lower than the joint stress. SCS glass structures can have adequate fatigue resistance for deep ocean use. Non-SCS materials were not shown to be suitable for naval hull structures. Author

Subject Categories:

  • Ceramics, Refractories and Glass
  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE