IMPACT STRENGTH AND RESPONSE OF PROTECTED BRITTLE MODELS OF DEEP SUBMERGENCE STRUCTURES.

Abstract

Hemispherical shell models of deep-submergence structures and full-thickness plate (brittle) specimens protected by viscoelastic strain-attenuating material (Adiprene) were subjected to impact by spherical faced projectiles weighing from less than 0.1 to 1100 lb at velocities up to 30 ft/sec. Maximum tensile strain amplitudes in shells were reduced by a factor of 10 or better and contact failures were eliminated by the use of Adiprene. Maximum tensile strains at failure were from 1000 to 2300 micro-in/in for annealed glass plates, and from 3400 to 5800 micro-in/in for chemically strengthened (Herculite) glass plates; glass-reinforced plastic plates could not be damaged (except for crazing cracks between parallel adjacent fibers on the tension surface). Scaling relationships and empirical strain functions for predicting maximum tensile strains in large prototype shells were developed. Data and empirical functions were checked against impact and shell theories of Hertz and Reissner with fairly good agreement resulting. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1967
Accession Number
AD0654165

Entities

People

  • H. Hashmall
  • S. Zilliacus

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Agreements
  • Amplitude
  • Hemispherical Shells
  • Impact Strength
  • Materials
  • Models
  • Physical Properties
  • Projectiles
  • Prototypes
  • Tensile Strain
  • Thickness

Readers

  • Marine Hydrodynamics
  • Polymer Science and Engineering.
  • Structural Dynamics.