Time Resolved Measurement and Analysis of the Response of Confined Explosives to Heat, Impact and Penetration

摘要

We have developed test fixtures and diagnostics for studying bullet/fragment attack on explosives. The principal new feature is the use of high elongation strain gauges and digital recording to obtain high resolution mechanical response. The first test series was successful. Gauge and camera records show clear differentiation of mechanical and explosive response with microsecond resolution. We have also developed a new test fixture for evaluating the violence of the thermal response of confined explosives. The fixture is designed to provide simple heat flow and relatively simple mechanical response. Comparisons between hydrodynamic calculations and experiment show quantitatively the deflagrative nature of the response. Five-nanosecond response infrared radiometers have been used in planar impact experiments to measure the radiance histories from shocked explosives. The shock heating of granular pressed explosives is resolved into two parts which we believe correspond to hot spot formulation and subsequent growth. Using this technique we have shown a strong particle size effect in the insensitive explosive TATB. 25 figures. (ERA citation 09:005361)