A theoretical basis for an experimental shock-induced deflagration study in HMX

• Main Authors: Perry, W. Lee, Reiz, Rachel, Wilkening, Jason, Duque, Amanda, Kilgore, Samuel Gary, Rakoski, Michael, Kroger, Nicholas, Ragan, Sarah Beth
• Format: Conference Proceeding
• Language: English
• Subjects: Deflagration; Diamond anvil cells; Growth models; HMX; Ignition; Microstructure; Nonuniformity; Pressure dependence; Shock waves; Size distribution
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/12.0034433

The general framework of heterogeneous high explosive hydrodynamic ignition and growth class of model accounts for the processes that occur within the microstructure for the localization of shock wave energy to ignite the hot spots, and the subsequent combustion – deflagration - waves that propagate from the hotspots to consume the explosive and produce the gas products. Typically, we calibrate these models in a convoluted way, as typical experiments do not isolate the ignition versus the growth elements. Here, we consider the pressure-dependent πSURF ignition and growth model as a framework that isolates the two components. Diamond anvil cell experiments have provided measurements of the deflagration speed at the appropriate pressures; however, the non-uniformity of the shock wave within the microstructure will likely cause a different characteristic deflagration speed for a bulk shock pressure equivalent to those studied in the DAC. Here, we report the theory-based design of a high-pressure plate-impact experiment using an HMX explosive target designed to isolate the deflagration term in the πSURF model by controlling the void size distribution.