A Finite Srain, Non-Reactive EOS for PBX9502

ORAL

Abstract

Like some liquids, the shock velocity - particle velocity relation for PBX9502 is initially curved, but tends to a linear relation for stronger shocks. Because of this, the method developed by Jeanloz of finding a Taylor expansion form for the principal isentrope cannot be used to develop an equation of state (EOS). Instead, the principal isentrope has been found from the Hugoniot by integration, using an analytic form for the variation of Gruneisen Gamma with specific volume. The isentrope has been extended by plausible extrapolations, both beyond the maximum Hugoniot compression and into the expansion regime. Finally an analytic fit has been made to the resulting principal isentrope to develop a Mie-Gruneisen form of EOS.

Authors

  • Brian Lambourn

    AWE plc

  • Nicholas Whitworth

    AWE plc

  • Caroline Handley

    AWE plc, AWE

  • Hugh James

    AWE, AWE, Aldermaston, AWE plc