Mesoscale Modeling of LX-17 Under Isentropic Compression

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Mesoscale simulations of LX-17 incorporating different equilibrium mixture models were used to investigate the unreacted equation-of-state (UEOS) of TATB. Candidate TATB UEOS were calculated using the equilibrium mixture models and benchmarked with mesoscale simulations of isentropic compression experiments (ICE). X-ray computed tomography (XRCT) data provided the basis for initializing the simulations with realistic microstructural details. Three equilibrium mixture models were used in this study. The single constituent with conservation equations (SCCE) model was based on a mass-fraction weighted specific volume and the conservation of mass, momentum, and energy. The single constituent equation-of-state (SCEOS) model was based on a mass-fraction weighted ... continued below

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Springer, H K; Willey, T M; Friedman, G; Fried, L E; Vandersall, K S & Baer, M R March 6, 2010.

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Mesoscale simulations of LX-17 incorporating different equilibrium mixture models were used to investigate the unreacted equation-of-state (UEOS) of TATB. Candidate TATB UEOS were calculated using the equilibrium mixture models and benchmarked with mesoscale simulations of isentropic compression experiments (ICE). X-ray computed tomography (XRCT) data provided the basis for initializing the simulations with realistic microstructural details. Three equilibrium mixture models were used in this study. The single constituent with conservation equations (SCCE) model was based on a mass-fraction weighted specific volume and the conservation of mass, momentum, and energy. The single constituent equation-of-state (SCEOS) model was based on a mass-fraction weighted specific volume and the equation-of-state of the constituents. The kinetic energy averaging (KEA) model was based on a mass-fraction weighted particle velocity mixture rule and the conservation equations. The SCEOS model yielded the stiffest TATB EOS (0.121{micro} + 0.4958{micro}{sup 2} + 2.0473{micro}{sup 3}) and, when incorporated in mesoscale simulations of the ICE, demonstrated the best agreement with VISAR velocity data for both specimen thicknesses. The SCCE model yielded a relatively more compliant EOS (0.1999{micro}-0.6967{micro}{sup 2} + 4.9546{micro}{sup 3}) and the KEA model yielded the most compliant EOS (0.1999{micro}-0.6967{micro}{sup 2}+4.9546{micro}{sup 3}) of all the equilibrium mixture models. Mesoscale simulations with the lower density TATB adiabatic EOS data demonstrated the least agreement with VISAR velocity data.

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  • Presented at: 14th International Detonation Symposium, Coeur d'Alene, ID, United States, Apr 11 - Apr 16, 2010

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  • Report No.: LLNL-CONF-425427
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 978411
  • Archival Resource Key: ark:/67531/metadc929265

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  • March 6, 2010

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  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 29, 2016, 8:01 p.m.

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Springer, H K; Willey, T M; Friedman, G; Fried, L E; Vandersall, K S & Baer, M R. Mesoscale Modeling of LX-17 Under Isentropic Compression, article, March 6, 2010; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc929265/: accessed June 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.