Dynamic Behavior of Brittle Materials.

Abstract

The objective of this work aimed at understanding the dynamic response of brittle materials under high rates of loading which are typical of high speed impact and shock generation. Three areas of investigation are covered, namely. (1) the dynamic strength of ceramics in uniaxial compression but under lateral confinement, (2) the propagation of stress waves through fractured but contiguous materials, and (3) shock-induced gas-producing reactions. The results of these studies indicate: The compression strength of ceramics under high speed impact is systematically and materially increased with progressive lateral constraint or lateral stressing. Wave propagation through fractured solids can be assessed through optical interferometry with high-speed photography. It is suggested that under shock conditions the Rayleigh-Taylor instability of interfacial mixing plays a dominant role in potential chemical processes that are shock induced.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 1996
Accession Number
ADA313730

Entities

People

  • G. Ravichandran
  • T. J. Ahrens
  • W. G. Knauss

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Cameras
  • Ceramic Matrix Composites
  • Composite Materials
  • Failure Mode And Effect Analysis
  • Materials
  • Materials Science
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Payload
  • Photographs
  • Physical Properties
  • Rayleigh Taylor Instability
  • Stress Strain Relations
  • Stress Waves
  • Stresses
  • Wave Propagation

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Combustion Dynamics and Shock Wave Physics.
  • Materials Science (Mechanical Engineering).