Relationship between pressure and reaction violence in thermal explosions
Reaction violence of a thermal explosion is determined by the energy release rate of the explosive and the coupling of that energy to the case and surroundings. For the HMX and TATB based secondary high explosives studied, we have observed that temperature controls the time to explosion and pressure controls the final energy release rate subsequent to ignition. Pressure measurements in the thermal explosion regime have been notoriously difficult to make due to the extreme rise in temperature which is also occurring during a thermal explosion. We have utilized several different pressure measurement techniques for several different secondary high explosives. These techniques include commercially available piezoelectric and piezoresistive sensors which we have utilized in the low pressure (sub 30 MPa) range of PBX 9502 thermal explosions, and fiber Bragg grating sensors for the higher pressure range (up to GPa) for PBX9501 experiments. In this talk, we will compare the measurement techniques and discuss the pressures measured for the different formulations studied. Simultaneous x-ray radiography measurements of burn velocity will also be shown and correlations between pressure, burn velocity, and reaction violence will be discussed.
- Research Organization:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- 89233218CNA000001
- OSTI ID:
- 1601381
- Report Number(s):
- LA-UR-15-25411; TRN: US2103631
- Journal Information:
- AIP Conference Proceedings, Vol. 1793; Conference: 19.Biennial Conference on Shock Compression of Condensed Matter (SCCM-2015), Tampa Bay, FL (United States), 14-19 Jun 2015; ISSN 0094-243X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Laser synchronization of a thermal explosion
|
journal | June 2007 |
Coherent pulse interrogation system for fiber Bragg grating sensing of strain and pressure in dynamic extremes of materials
|
journal | January 2015 |
X-ray transmission movies of spontaneous dynamic events
|
journal | November 2014 |
Thermal decomposition of energetic materials viewed via dynamic x-ray radiography
|
journal | January 2014 |
Similar Records
On the violence of thermal explosion in solid explosives
Thermal Explosion Violence of HMX-Based and RDX-Based Explosives - Effects of Composition, Confinement, and Solid Phase Using the Scaled Thermal Explosion Experiment