Abstract
A Sympathetic detonation (SD) is a detonation of an explosive charge by a nearby explosion. Most of times it is unintended while the impact of blast fragments or strong shock waves from the initiating donor explosive is the cause of SD. We investigate the SD of a cylindrical explosive charge (64 % RDX, 20 % Al, 16 % HTPB) contained in a steel casing. The constitutive relations for high explosive are obtained from a thermo-chemical code that provides the size effect data without the rate stick data typically used for building the rate law and equation of state. A full size SD test of eight pallet-packaged artillery shells is performed that provides the pressure data while the hydrodynamic model with proper constitutive relations for reactive materials and the fragmentation model for steel casing is conducted to replicate the experimental findings. The work presents a novel effort to accurately model and reproduce the sympathetic detonation event with a reduced experimental effort.
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Recommended by Associate Editor Won Gyu Shin
Jai-ick (Jack) Yoh is a Professor at Seoul National University. He received his Ph.D. in Theoretical & Applied Mechanics (Combustion) from UIUC and has worked for LLNL as a Staff Scientist prior to joining SNU. His research interests include combustion, energetics, and innovative laser applications.
Bohoon Kim is currently a Ph.D. candidate in Department of Mechanical and Aerospace Engineering at Seoul National University. His research interests include Reactive flow model for energetic materials and Shock to detonation transition analysis.
Minsung Kim is currently a M.S. candidate in Department of Mechanical and Aerospace Engineering at Seoul National University. His research interests are reactive flow model for energetic materials including deflagration analysis.
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Kim, B., Kim, M., Sun, T. et al. Simulating sympathetic detonation using the hydrodynamic models and constitutive equations. J Mech Sci Technol 30, 5491–5502 (2016). https://doi.org/10.1007/s12206-016-1117-2
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DOI: https://doi.org/10.1007/s12206-016-1117-2