Aluminum Flyer Plate Test
About
Popolato's (Pop) plot of input pressure (velocity) versus distance to steady state detonation is a widely used metric for determining accuracy of shock to detonation models. DDT1 as a deflagration-to-detonation model
is capable of doing SDT as well as slower cookoff type experiments. The Aluminum Flyer Plate test was performed by researchers at LLNL and LASL [1,3]. It is designed to give pressure histories for studying the
evolution of the SDT. Ignition and Growth SDT model is capable of giving good pressure profiles. Being that JWL++ is a brother of I and G, they have similar behavior. One test of convective burning behavior inDDT1 is
to make sure SDT happens at the right distance. Data from [1-3] were for the POP plot shown below.
Below are the pressure histories for several guage positions from out Aluminum flyer plate simulation. Input file example is located here. In the Aluminum flyer plate simulation
pressures are messured at 5 or 10 mm intervals from impact point using piezoelectric manganin guages. One failure of the simulation is representation of the thin teflon sheets in between plates of explosive.
Our simulation does not represent them, though it does give decent behavior.
Another component of the Pop-plot is the run time to detonation. Below is comparison of this metric to data from [1-3].
Conclusion
References
1. Vandersall, K.S., Tarver, C.M., Garcia, F., Chidester, S.K. On the low pressure shock initiation of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine based plastic bonded explosives. J. Appl. Phys. 2010, 107.
2. Gibbs, T.R., Poplato, A. Eds. LASL explosive property data. Berkeley, University of California Press: 1980.
3. Chidester, S.K., Thompson, D.G., Vandersall, K.S., Idar, D.J., Tarver, C.M., Garcia, F., Urtiew, P.A. Shock Initiation Experiments on PBX 9501 Explosive at Pressures Below 3 GPa with Associated Ignition and Growth Modeling. Shock Compression of Condensed Matter 2007, 903-906.
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