Yield and Plastic Flow in Composition B and TNT
Abstract
The yield strengths and elastic properties of trinitrotoluene (TNT) and a composite (Composition B) of TNT and cyclotrimethylene trinitramine (RDX) have been studied by confined triaxial compression (uniaxial strain) as a function of temperature and strain rate. The yield strength of Composition B decreases with increasing temperature and decreasing strain rate, while more limited results for TNT indicate that the yield strength of the TNT used in this investigation decreases slightly with increasing temperature and is insensitive to strain rate. The results for Composition B can be explained in terms of thermally activated dislocation motion over short range barriers while the results for TNT indicate that dislocation motion is controlled by (athermal) long range internal stress fields. The results further indicate that the yield strengths and so the magnitudes of the long range internal stress fields are about the same for TNT and Composition B close to the TNT melting temperature... . Composition B, TNT, Triaxial stress, Yield strength, Young's modulus, Poisson's ratio, Friction, Dislocations, Thermal activation, Short range barriers, Internal stress fields.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1993
- Accession Number
- ADA260608
Entities
People
- D. A. Wiegand
- James O. Pinto
Organizations
- United States Army Armament Research, Development and Engineering Center