MESOSCALE MODELING OF DEFLAGRATION-INDUCED DECONSOLIDATION IN POLYMER-BONDED EXPLOSIVES

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Initially undamaged polymer-bonded explosives can transition from conductive burning to more violent convective burning via rapid deconsolidation at higher pressures. The pressure-dependent infiltration of cracks and pores, i.e., damage, by product gases at the burn-front is a key step in the transition to convective burning. However, the relative influence of pre-existing damage and the evolution of deflagration-induced damage during the transition to convective burning is not well understood. The objective of this study is to investigate the role of microstructure and initial pressurization on deconsolidation. We performed simulations using the multi-physics hydrocode, ALE3D. HMX-Viton A served as our model explosive. ... continued below

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Springer, H K; Glascoe, E A; Reaugh, J E; Kercher, J R & Maienschein, J L August 1, 2011.

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Initially undamaged polymer-bonded explosives can transition from conductive burning to more violent convective burning via rapid deconsolidation at higher pressures. The pressure-dependent infiltration of cracks and pores, i.e., damage, by product gases at the burn-front is a key step in the transition to convective burning. However, the relative influence of pre-existing damage and the evolution of deflagration-induced damage during the transition to convective burning is not well understood. The objective of this study is to investigate the role of microstructure and initial pressurization on deconsolidation. We performed simulations using the multi-physics hydrocode, ALE3D. HMX-Viton A served as our model explosive. A Prout-Tompkins chemical kinetic model, Vielle's Law pressure-dependent burning, Gruneisen equation-of-state, and simplified strength model were used for the HMX. The propensity for deconsolidation increased with increasing defect size and decreasing initial pressurization, as measured by the increase in burning surface area. These studies are important because they enable the development of continuum-scale damage models and the design of inherently safer explosives.

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PDF-file: 6 pages; size: 1 Mbytes

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  • Presented at: 17th APS SCCM Conference, Chicago, IL, United States, Jun 26 - Jul 01, 2011

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  • Report No.: LLNL-CONF-491845
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1022908
  • Archival Resource Key: ark:/67531/metadc832816

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  • August 1, 2011

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  • May 19, 2016, 3:16 p.m.

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  • Nov. 29, 2016, 8:01 p.m.

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Springer, H K; Glascoe, E A; Reaugh, J E; Kercher, J R & Maienschein, J L. MESOSCALE MODELING OF DEFLAGRATION-INDUCED DECONSOLIDATION IN POLYMER-BONDED EXPLOSIVES, article, August 1, 2011; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc832816/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.