HYDROSTATIC, CREEP, AND CYCLIC TESTS OF RADIALLY ORIENTED GLASS-FIBER REINFORCED PLASTIC SPHERES.

Abstract

A technique was developed in which glass-reinforced plastic spheres can be fabricated with the fibers oriented in the radial direction. The David Taylor Model Basin tested two 3-in.-diameter spheres of such construction and obtained very encouraging results. The two spheres tested had a weight to displacement ratio of 0.50 and a collapse pressure of at least 25,000 psi. A maximum stress of 165,000 was developed in the spheres prior to failure. Failure most likely occurred by elastic buckling. A 5-hr creep test conducted at a pressure comparable to a depth of 20,000 ft which generated a stress level of 57,500 psi indicated that creep was not severe. A cyclic test of 5000 times to a depth of 20,000 ft resulted in no apparent reduction in structural integrity. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1965
Accession Number
AD0622071

Entities

People

  • William P. Couch

Tags

DTIC Thesaurus Topics

  • Buckling
  • Collapse
  • Construction
  • Creep
  • Creep Tests
  • Cyclic Tests
  • Diameters
  • Displacement
  • Fibers
  • Glass Fibers
  • Model Basins
  • Physical Properties
  • Ship Model Basins
  • Structural Integrity

Readers

  • Reinforced Composite Materials
  • Structural Dynamics.