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Title: Relationship between pressure and reaction violence in thermal explosions

Abstract

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.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1601381
Report Number(s):
LA-UR-15-25411
Journal ID: ISSN 0094-243X
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1793; Conference: Shock Compression of Condensed Matter - 2015, Tampa Bay, FL (United States), 14-19 Jun 2015; Journal ID: ISSN 0094-243X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; thermal explosion; Fiber optic devices; Piezoresistance; Piezoelectricity; Radiography; Explosives

Citation Formats

Smilowitz, Laura Beth, Henson, Bryan Fayne, Rodriguez, George, Remelius, Dennis Keith, Baca, Eva V., Oschwald, David M., and Suvorova, Natalya Alexandra. Relationship between pressure and reaction violence in thermal explosions. United States: N. p., 2017. Web. doi:10.1063/1.4971533.
Smilowitz, Laura Beth, Henson, Bryan Fayne, Rodriguez, George, Remelius, Dennis Keith, Baca, Eva V., Oschwald, David M., & Suvorova, Natalya Alexandra. Relationship between pressure and reaction violence in thermal explosions. United States. doi:10.1063/1.4971533.
Smilowitz, Laura Beth, Henson, Bryan Fayne, Rodriguez, George, Remelius, Dennis Keith, Baca, Eva V., Oschwald, David M., and Suvorova, Natalya Alexandra. Fri . "Relationship between pressure and reaction violence in thermal explosions". United States. doi:10.1063/1.4971533. https://www.osti.gov/servlets/purl/1601381.
@article{osti_1601381,
title = {Relationship between pressure and reaction violence in thermal explosions},
author = {Smilowitz, Laura Beth and Henson, Bryan Fayne and Rodriguez, George and Remelius, Dennis Keith and Baca, Eva V. and Oschwald, David M. and Suvorova, Natalya Alexandra},
abstractNote = {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.},
doi = {10.1063/1.4971533},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = ,
volume = 1793,
place = {United States},
year = {2017},
month = {1}
}

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Works referenced in this record:

Laser synchronization of a thermal explosion
journal, June 2007

  • Smilowitz, L.; Henson, B. F.; Sandstrom, M. M.
  • Applied Physics Letters, Vol. 90, Issue 24
  • DOI: 10.1063/1.2747661

Coherent pulse interrogation system for fiber Bragg grating sensing of strain and pressure in dynamic extremes of materials
journal, January 2015

  • Rodriguez, George; Jaime, Marcelo; Balakirev, Fedor
  • Optics Express, Vol. 23, Issue 11, p. 14219-14233
  • DOI: 10.1364/OE.23.014219

X-ray transmission movies of spontaneous dynamic events
journal, November 2014

  • Smilowitz, L.; Henson, B. F.; Holmes, M.
  • Review of Scientific Instruments, Vol. 85, Issue 11, Article No. 113904
  • DOI: 10.1063/1.4901093

Thermal decomposition of energetic materials viewed via dynamic x-ray radiography
journal, January 2014

  • Smilowitz, L.; Henson, B. F.; Romero, J. J.
  • Applied Physics Letters, Vol. 104, Issue 2, Article No. 024107
  • DOI: 10.1063/1.4858965