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Title: Gas Gun Experiments and Numerical Simulations on the HMX Based Explosive PBX 9501 in the Overdriven Regime

Authors:
 [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Los Alamos National Laboratory
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1378915
Report Number(s):
LA-UR-17-27894
DOE Contract Number:
AC52-06NA25396
Resource Type:
Conference
Resource Relation:
Conference: 20th Biennial APS Conference on Shock Compression of Condensed Matter ; 2017-07-09 - 2017-07-14 ; St. Louis, Missouri, United States
Country of Publication:
United States
Language:
English
Subject:
WSD Burn Model Overdriven PBX 9501 Gas Gun

Citation Formats

Pittman, Emily Rose, Hagelberg, Carl Richard, Gustavsen, Richard L., and Aslam, Tariq Dennis. Gas Gun Experiments and Numerical Simulations on the HMX Based Explosive PBX 9501 in the Overdriven Regime. United States: N. p., 2017. Web.
Pittman, Emily Rose, Hagelberg, Carl Richard, Gustavsen, Richard L., & Aslam, Tariq Dennis. Gas Gun Experiments and Numerical Simulations on the HMX Based Explosive PBX 9501 in the Overdriven Regime. United States.
Pittman, Emily Rose, Hagelberg, Carl Richard, Gustavsen, Richard L., and Aslam, Tariq Dennis. 2017. "Gas Gun Experiments and Numerical Simulations on the HMX Based Explosive PBX 9501 in the Overdriven Regime". United States. doi:. https://www.osti.gov/servlets/purl/1378915.
@article{osti_1378915,
title = {Gas Gun Experiments and Numerical Simulations on the HMX Based Explosive PBX 9501 in the Overdriven Regime},
author = {Pittman, Emily Rose and Hagelberg, Carl Richard and Gustavsen, Richard L. and Aslam, Tariq Dennis},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 8
}

Conference:
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  • High Explosives (HE) performs work by the expansion of its detonation products. Along with the propagation of the detonation wave, the equation of state (EOS) of the products determines the HE performance in an engineering system. The authors show the failure of the standard Jones-Wilkins-Lee (JWL) equation of state (EOS) in modeling the overdriven release experiments of PBX 9501. The deficiency can be tracked back to inability of the same EOS in matching the shock pressure and the sound speed on the Hugoniot in the hydrodynamic regime above the Chapman-Jouguet pressure. After adding correction terms to the principal isentrope ofmore » the standard JWL EOS, the authors are able to remedy this shortcoming and the simulation was successful.« less
  • Structures capable of either containing or surviving nearby detonating explosive are useful research tools for investigating properties of materials. Our particular interest is in spherical steel vessels that are only stressed elastically. Although there is a large amount of data describing blast waves in air, it is mostly for the farfield region R > 1 where R is the reduced radius - that is, the distance from the charge center divided by the cube root of the charge mass - expressed here in m/kg//sup 1///sup 3/. Our region of investigation was the range 0.3 < R < 0.7. For thesemore » distances the blast effect is mainly impulsive, and normally less than 1% of the explosive energy is coupled into kinetic energy of the vessel. The response of vessels to spherical charges of the HMX-based explosive PBX 9501 has been investigated both for vessels filled with ambient air and evacuated. A simple scaling model is used to correlate the data for various size vessels and to describe the impulse on structures. This model is then applied to one test of the TATB-based explosive PBX 9502. Finally, the immediate residual pressure in the vessels was measured to show the degree of short-term overpressure in evacuated structures. 1 ref., 2 figs., 3 tabs.« less
  • Shock initiation experiments on the explosive PBX 9501 (95% HMX, 2.5% estane, and 2.5% nitroplasticizer by weight) were performed at pressures below 3 GPa to obtain in-situ pressure gauge data, run-distance-to-detonation thresholds, and Ignition and Growth modeling parameters. Propellant driven gas guns (101 mm and 155 mm) were utilized to initiate the PBX 9501 explosive with manganin piezoresistive pressure gauge packages placed between sample slices. The run-distance-to-detonation points on the Pop-plot for these experiments showed agreement with previously published data and Ignition and Growth modeling parameters were obtained with a good fit to the experimental data. This parameter set willmore » allow accurate code predictions to be calculated for safety scenarios in the low-pressure regime (below 3 GPa) involving PBX 9501 explosive.« less
  • A better understanding of thermal cook-off is important for safe handling and storing explosive devices. A number of safety issues exist about what occurs when a cased explosive thermally cooks off. For example, violence of the events as a function of confinement are important for predictions of collateral damage. This paper demonstrates how adjacent materials can be gauged to measure the resulting pressure wave and how this wave propagates in this adjacent material. The output pulse from the thermal cook-off explosive containing fixture is of obvious interest for assessing many scenarios.