| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Understanding and Predicting Dynamic Behavior of Materials
|
| Presentation Title |
Determination of Equation of State in Polyurea Elastomers via Reverberation and Hydrodynamic Instability Experiments |
| Author(s) |
Tyler Eastmond, Elizabeth Fortin, Zak Wilde, Kirk Bohlen, Jay Oswald, Pedro Peralta |
| On-Site Speaker (Planned) |
Tyler Eastmond |
| Abstract Scope |
Polyurea has shown potential as a protective coating in body and vehicle armor, serving to reduce damage and fragmentation when a coated armor is exposed to blasts and ballistic impacts. Hence, the behavior of polyurea at pressures above 20 GPa and strain rates of 105-106 s-1 needs to be better understood and quantified to design polyurea coatings. Experiments to quantify the equation of state of polyurea at high pressures were performed using a shock reverberation in a single stage gas gun, where a thin polyurea film was sandwiched between tungsten plates and impacted with a tungsten flyer, while the free surface velocity history on the back tungsten plate was recorded using laser velocimetry. In addition, laser-driven experiments to monitor the evolution of perturbed shock fronts were used to reach pressures ≈ 60 GPa. Results were used to validate molecular dynamic simulations of the high-pressure behavior of polyurea. |
| Proceedings Inclusion? |
Undecided |