AWSD Reactive Burn Models for HMX-based High Explosives

Models of shock-induced chemical reactions and high explosive (HE) detonations play an important role in predicting the performance of HEs and energetic materials. For example, reactive burn models of HEs are used to understand and predict performance under various shock conditions. In this talk, I will show the results of Arrhenius–Wescott–Stewart–Davis (AWSD) reactive burn models for high explosives PBX 9404, LX-14, and LX-04. The models are developed by fitting equations of state for reactants and detonation products to the results of thermochemical calculations and to experimental data from multiple sources. The calibrated equations of state are then coupled with an Arrhenius rate law based on shock temperature that describes the reaction progress during detonation. The parameter values in the model are calibrated to experimental gas-gun data, diameter effect results, and data from other experimental sources. The results of the calibrated AWSD model for all of the HEs are in strong agreement with available experimental data.