Experimental Validation of Detonation Shock Dynamics in Condensed Explosives
AIR FORCE RESEARCH LAB EGLIN AFB FL MUNITIONS DIRECTORATE
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Experiments in the HMX-based condensed explosive PBX-9501 were carried out to validate a reduced, asymptotically derived description of detonation shock dynamics DSD where it is assumed that the normal detonation shock speed is determined by the total shock curvature. The Passover experiment has a lead disk embedded in a right circular cylindrical charge of PBX-9501 and is initiated from the bottom. The subsequent detonation shock experiences a range of dynamic states with both diverging convex and converging concave configurations as the detonation shock passes over the disk. The time of arrival of the detonation shock at the top surface of the charge is recorded and compared against DSD simulation and direct multi-material simulation. A new wide-ranging equation of state EOS and rate law that is constrained by basic explosive characterization experiments is introduced as a constitutive description of the explosive.