Data Analysis, Pre-Ignition Assessment, and Post-Ignition Modeling of the Large-Scale Annular Cookoff Tests

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In order to understand the implications that cookoff of plastic-bonded explosive-9501 could have on safety assessments, we analyzed the available data from the large-scale annular cookoff (LSAC) assembly series of experiments. In addition, we examined recent data regarding hypotheses about pre-ignition that may be relevant to post-ignition behavior. Based on the post-ignition data from Shot 6, which had the most complete set of data, we developed an approximate equation of state (EOS) for the gaseous products of deflagration. Implementation of this EOS into the multimaterial hydrodynamics computer program PAGOSA yielded good agreement with the inner-liner collapse sequence for Shot 6 ... continued below

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Terrones, G.; Souto, F.J.; Shea, R.F.; M.W.Burkett & Idar, E.S. September 30, 2005.

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In order to understand the implications that cookoff of plastic-bonded explosive-9501 could have on safety assessments, we analyzed the available data from the large-scale annular cookoff (LSAC) assembly series of experiments. In addition, we examined recent data regarding hypotheses about pre-ignition that may be relevant to post-ignition behavior. Based on the post-ignition data from Shot 6, which had the most complete set of data, we developed an approximate equation of state (EOS) for the gaseous products of deflagration. Implementation of this EOS into the multimaterial hydrodynamics computer program PAGOSA yielded good agreement with the inner-liner collapse sequence for Shot 6 and with other data, such as velocity interferometer system for any reflector and resistance wires. A metric to establish the degree of symmetry based on the concept of time of arrival to pin locations was used to compare numerical simulations with experimental data. Several simulations were performed to elucidate the mode of ignition in the LSAC and to determine the possible compression levels that the metal assembly could have been subjected to during post-ignition.

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  • Report No.: LA-14190
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/861364 | External Link
  • Office of Scientific & Technical Information Report Number: 861364
  • Archival Resource Key: ark:/67531/metadc794634

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  • September 30, 2005

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

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  • June 17, 2016, 3:07 p.m.

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Terrones, G.; Souto, F.J.; Shea, R.F.; M.W.Burkett & Idar, E.S. Data Analysis, Pre-Ignition Assessment, and Post-Ignition Modeling of the Large-Scale Annular Cookoff Tests, report, September 30, 2005; Oak Ridge, Tennessee. (digital.library.unt.edu/ark:/67531/metadc794634/: accessed September 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.