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Effect of microstructure on the detonation initiation in energetic materials

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Abstract

In this work we examine the role of the microstructure on detonation initiation of energetic materials. We solve the reactive Euler equations, with the energy equation augmented by a power deposition term. The deposition term is based on simulations of void collapse at the microscale, modeled at the mesoscale as hot-spots, while the reaction rate at the mesoscale is modeled using density-based kinetics. We carry out two-dimensional simulations of random packs of HMX crystals in a binder. We show that mean particle size, size distribution, and particle shape have a major effect on the transition between detonation and no-detonation, thus highlighting the importance of the microstructure for shock-induced initiation.

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Acknowledgements

This work was supported in part by the Defense Threat Reduction Agency, Basic Research Award under Award No. HDTRA1-14-1-0031. This work was also supported in part by the U.S. Department of Energy, National Nuclear Security Administration, Advanced Simulation and Computing Program, as a Cooperative Agreement under the Predictive Science Academic Alliance Program, under Contract No. DE-NA0002378.

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Authors and Affiliations

  1. Department of Mechanical and Aerospace Engineering, F.W. Olin Engineering, 251, Florida Institute of Technology, 150 West University Blvd., Melbourne, FL, 32901, USA

    J. Zhang

  2. Department of Mechanical and Aerospace Engineering, Particle Science and Technology, University of Florida, Building 0746 Room 205B, 1180 Center Drive, Gainesville, FL, 32611, USA

    T. L. Jackson

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Correspondence to J. Zhang.

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Communicated by A. Higgins.

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Zhang, J., Jackson, T.L. Effect of microstructure on the detonation initiation in energetic materials. Shock Waves 29, 327–338 (2019). https://doi.org/10.1007/s00193-017-0796-7

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