Abstract
To investigate the detonation characteristics of an insensitive Plastic bonded explosive (PBX), the reaction rate was obtained and used in the numerical simulation of diverse case problems in the one-dimensional and two dimensional space. To calibrate the reaction rate, Detonation shock dynamics (DSD) theory was adopted, and two-dimensional steady-state experimental data were used to determine the shock front curvature function D n (κ). The reaction rate was calibrated by numerically integrating the master equation of the DSD theory. For the calibrated reaction rate, the simulation of the Large scale gap test (LSGT) and EIDS CAP test with regard to the shock sensitivity problem were carried out. Two numerical example were investigated using the reaction rate. First, an underwater explosion, which is basically a one-dimensional problem, was solved. Second, to also validate the reaction rate detonation wave progress, a corner turning problem was solved. Considering the results of the simulations and the experimental test, it was concluded that the calibrated reaction rate well describes the detonation characteristics of insensitive PBX with a reasonable degree of accuracy. The present study is the first case to obtain the reaction rate of an insensitive castable PBX using the DSD theory. Moreover the reaction rate obtained was verified using different detonation tests such as the gap sensitivity test, the underwater explosion test and the detonation wave propagation test.
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Recommended by Editor Yong Tae Kang
Jungsu Park received his Ph.D. in Mechanical Engineering at KAIST in 2011. He works for the High Explosives Team of the Agency for Defense Development, Daejeon, Korea as a Principal Researcher. His research interests are reaction rate models of High Explosives and numerical simulations of detonation behaviors.
Sung-Kie Youn is a Professor of Mechanical Engineering at KAIST, Korea. He received his Ph.D. in University of Texas at Austin. He joined KAIST in 1988. His research interests include computational mechanics and design optimization.
Jaimin Lee received his Ph.D. in Metallurgy at the New Mexico Institute of Mining and Technology, Socorro, New Mexico, in 1990. He works for the Explosion Effects Team of the Agency for Defense Development, Daejeon, Korea, as a Principal Research Scientist. Areas of his research interests are detonation physics and numerical modeling of detonation phenomena.
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Park, J., Youn, Sk. & Lee, J. Calibration and verification of the reaction rate for an insensitive PBX. J Mech Sci Technol 31, 6019–6032 (2017). https://doi.org/10.1007/s12206-017-1146-5
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DOI: https://doi.org/10.1007/s12206-017-1146-5