Measurement of Explosion Time as a Function of Impact Pressure for PBX 950 (Plastic Bonded Explosive)
We report measurements of the surface temperature from confined PBX 9501 subject to impact in the range 0.5-1 GPa. The temperatures were obtained by IR radiometry with 80 {micro}m and 1 {micro}s spatial and temporal resolution, respectively. Two distinct types of experiment are reported. In one the shock was coupled into the sample through a sharp edged, shearing impactor, resulting in high, localized temperatures in the sheared boundary of the explosive. In the second a planar shock was used, and SiC particulate was spread uniformly across the explosive to induce frictional heating. Very high, uniformly distributed surface temperatures were observed in this case. In both types of experiment the temperature profile as a function of time exhibits a sharp rise, followed by a constant induction period of localized ignition. The measured induction time and temperature compare favorably with that predicted by the thermal decomposition model of HMX proposed by McGuire and Tarver.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Office of Defense Programs (DP)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 759306
- Report Number(s):
- LA-UR-98-3807; TRN: US200609%%511
- Resource Relation:
- Conference: 11th Detonation Symposium, Snowmass, CO, 08/31/1998 - 09/04/1998
- Country of Publication:
- United States
- Language:
- English
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