Cookoff of energetic materials

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An overview of cookoff modeling at Sandia National Laboratories is presented aimed at assessing the violence of reaction following cookoff of confined energetic materials. During cookoff, the response of energetic materials is known to involve coupled thermal/chemical/mechanical processes which induce thermal damage to the energetic material prior to the onset of ignition. These damaged states enhance shock sensitivity and lead to conditions favoring self-supported accelerated combustion. Thus, the level of violence depends on the competition between pressure buildup and stress release due to the loss of confinement. To model these complex processes, finite element-based analysis capabilities are being developed which ... continued below

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8 p.

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Baer, M.R.; Hobbs, M.L.; Gross, R.J. & Schmitt, R.G. September 1, 1998.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

An overview of cookoff modeling at Sandia National Laboratories is presented aimed at assessing the violence of reaction following cookoff of confined energetic materials. During cookoff, the response of energetic materials is known to involve coupled thermal/chemical/mechanical processes which induce thermal damage to the energetic material prior to the onset of ignition. These damaged states enhance shock sensitivity and lead to conditions favoring self-supported accelerated combustion. Thus, the level of violence depends on the competition between pressure buildup and stress release due to the loss of confinement. To model these complex processes, finite element-based analysis capabilities are being developed which can resolve coupled heat transfer with chemistry, quasi-static structural mechanics and dynamic response. Numerical simulations that assess the level of violence demonstrate the importance of determining material damage in pre- and post-ignition cookoff events.

Physical Description

8 p.

Notes

OSTI as DE98006264

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  • 11. detonation symposium, Snowmass, CO (United States), 31 Aug - 4 Sep 1998

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  • Other: DE98006264
  • Report No.: SAND--98-1946C
  • Report No.: CONF-980803--
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 639810
  • Archival Resource Key: ark:/67531/metadc690250

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Office of Scientific & Technical Information Technical Reports

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  • September 1, 1998

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  • Aug. 14, 2015, 8:43 a.m.

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  • April 13, 2016, 1:16 p.m.

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Baer, M.R.; Hobbs, M.L.; Gross, R.J. & Schmitt, R.G. Cookoff of energetic materials, article, September 1, 1998; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc690250/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.