Hugoniot and Mie–Grüneisen equation of state of unreacted 2,4-dinitroanisole (DNAN)

•The unreacted Hugoniot of DNAN was found using the pressure comparing method within the pressure range (3.6–14.4 GPa).•The effect of encapsulation on the manganin stress gauge signals was successfully simulated using a 1D Lagrangian hydrocode.•The pressure-comparing method can minimize the effect o...

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Bibliographic Details
Published in:International journal of impact engineering 2019-12, Vol.134, p.103369, Article 103369
Main Authors: Miao, Feichao, Zhang, Xiangrong, Zhou, Lin, Wu, Xinxin, Jiang, Tao, Xing, Ruoting
Format: Article
Language:English
Subjects:
Data points
Equations of state
Explosives
Hugoniot
Hugoniot curves
Impedance-matching
Manganin
Melting points
Mie–Grüneisen equation of state
Shock waves
Stress gauges
Thermodynamic properties
Trinitrotoluene
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Summary:•The unreacted Hugoniot of DNAN was found using the pressure comparing method within the pressure range (3.6–14.4 GPa).•The effect of encapsulation on the manganin stress gauge signals was successfully simulated using a 1D Lagrangian hydrocode.•The pressure-comparing method can minimize the effect on the experimental data of the explosive reacting.•Combining the unreacted Hugoniot and some thermodynamic parameters gives the Mie–Grüneisen EOS of DNAN. 2,4-dinitroanisole (DNAN) is an insensitive explosive with a low melting point. It is a good replacement for 2,4,6-trinitrotoluene (TNT) in melt-cast explosives. With the increasing use of DNAN-based explosives, the thermodynamic properties of DNAN are needed to model its responses. In this study, the Rankine–Hugoniot curve (or simply the Hugoniot) of DNAN was obtained using the pressure-comparing method. In the experiments, two manganin stress gauges were placed on the top surfaces of an explosive sample and a standard sample whose Hugoniot is known, which can minimize the effect on the experimental data of the explosive reacting. When a planar shock wave propagates simultaneously through both the explosive sample and the standard sample, the gauges record the pressures on the two surfaces. Combining paired data points from the two gauge data sets and the known Hugoniot of the standard sample gives the Hugoniot of DNAN. In addition, the Mie–Grüneisen equation of state was obtained by utilizing the Hugoniot as the reference curve.
ISSN:0734-743X
1879-3509
DOI:10.1016/j.ijimpeng.2019.103369