Shock Data Comparisons to EOS

Plots

Figure 1: P vs. V/V0 for Equations of State used. Notice that Vandersall's Parameters give a CJ pressure of 40 GPa while the new fit gives one closer to 36 GPa. The specific volume at which the CJ state is reached should be closer to 0.75. This is close, however, at higher pressures the product equation of state underestimates the pressure. The new reactant fit no longer fits low pressure data as closely, but it represents the CJ state much better, giving much closer detonation velocity and pressure. ViscoSCRAM throws in its own little bit of interesting nature as the next plot will show. Vandersall's Parameters from [1]. Data for v less than 0.75 come from LASL Explosive Property data [2]. All other data comes from Fritz et. al. [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. Fritz, J.N., Hixson, R.S., Shaw, M.S., Morris, C.E., McQueen, R.G. Overdriven-detonation and sound-speed measurements in PBX-9501 and the "thermodynamic" Chapman-Jouguet pressure. J. Appl. Phys. 1996, 80:11, pp. 6129-6141.

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