An equation of state for polyurea aerogel based on multi-shock response

18th APS-SCCM; 24th AIRAPT

Aslam, T.D.^1 ; Gustavsen, R.L.^1 ; Bartram, B.D.^1

WX-9, Shock and Detonation Physics, Los Alamos National Laboratory, Los Alamos

NM

87545, United States^1

关键词: Approximate Riemann solver;    Equation of state;    Initial density;    Model-based OPC;    Numerical scheme;    Shock compressions;    Shock response;    Total variation diminishing;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/3/032001/pdf
DOI  :  10.1088/1742-6596/500/3/032001

来源: IOP

【 摘 要 】

The equation of state (EOS) of polyurea aerogel (PUA) is examined through both single shock Hugoniot data as well as more recent multi-shock compression experiments performed on the LANL 2-stage gas gun. A simple conservative Lagrangian numerical scheme, utilizing total variation diminishing (TVD) interpolation and an approximate Riemann solver, will be presented as well as the methodology of calibration. It will been demonstrated that a p-a model based on a Mie-Gruneisen fitting form for the solid material can reasonably replicate multi-shock compression response at a variety of initial densities; such a methodology will be presented for a commercially available polyurea aerogel.