Application of the shock reverberation technique to determine Gr\"{u}neisen gamma for float glass

Determination of high strain-rate material properties following loading from a non-principle Hugoniot ground state requires detailed knowledge of the shape of a materials equation-of-state. The material-specific variable Gr\"{u}neisen gamma, $\gamma $(v), defines the shape of ``off-Hugoniot'' points in energy-volume-pressure space. Comparison between experimental and simulated results of ``ring-up'' experiments, where shock reflection allows a material to be loaded successively into a series of off-Hugoniot states, has the potential to allow ready access to values of gamma. However, previous attempts to determine $\gamma_{1}$ via comparison to ANSYS Autodyn$^{\textregistered}$ simulations for the temperature-resistant polymer polyether ether ketone (PEEK) only produced a partial success, due to the highly non-linear nature and poorly defined residual deviatoric (strength) effects inherent in the material response. Consequently, in this study an attempt is made using a similar approach to calculate $\gamma_{1}$ for the well-defined material float glass (whose high elastic limit should also minimise deviatoric effects).