High-Pressure Shock Response and Phase Transition of Soda-Lime Glass

The phase transition of crystalline and amorphous silica materials to a stishovite-like high-pressure phase has received considerable interest. While most work has focused on pure SiO2 glass (fused silica), studies identifying a similar high- pressure phase transformation in soda-lime glass have not been performed. Marked differences in the network structure and compressibility of soda-lime glass as compared to fused silica raise questions as to how a stishovite transition might manifest in these glasses. In this work, new plate impact experiments on soda-lime glass have been performed to similar to 110 GPa to measure the Hugoniot response in the high-pressure regime. Results of these tests were unable to find evidence of a transition to a high-pressure polymorph under shock loading. A glass constitutive model is proposed to capture this newly measured high-pressure response. Good agreement between time resolved measurements and simulation results from the CTH hydrocode with this model implemented are shown, along with additional insights into the apparent glass behavior.