Fracture of Composition B and TNT

Abstract

The compressive fracture strength of Composition B and TNT has been investigated in uniaxial compression as a function of temperature and strain rate. Young's modulus and other aspects of stress strain behavior were also studied. The compressive fracture strengths and the moduli decrease with increasing temperature and decreasing strain rate. Limited tensile measurements were also made. Failure is by brittle fracture for all conditions investigated and can be explained in terms of the Griffith criteria for fracture. The temperature and strain rate dependence of the compressive strength can be attributed to the dependence of the modulus on these parameters and thermally activated slow subcritical crack growth before fracture.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1991
Accession Number
ADA233927

Entities

People

  • D. A. Wiegand
  • James O. Pinto

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Compressive Strength
  • Crack Propagation
  • Creep
  • Crystal Structure
  • Explosives
  • Grain Boundaries
  • Grain Size
  • Low Temperature
  • Materials
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Strain Gages
  • Stress Corrosion
  • Stress Intensity Factors
  • Tensile Strength
  • Tensile Stress

Readers

  • Mechanical Engineering/Mechanics of Materials.