Mechanical Response and Decomposition of Thermally Degraded Energetic Materials: Experiments and Model Simulations

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We report progress of a continuing effort to characterize and simulate the response of energetic materials (EMs), primarily HMX-based, under conditions leading to cookoff. Our experiments include mechanical-effects testing of HMX and FIMX with binder at temperatures nearing decomposition thresholds. Additional experiments have focused on decomposition of these EMs under confinement, measuring evolution of gas products and observing the effect of pressurization on the solid. Real-time measurements on HMX show abrupt changes that maybe due to sudden void collapse under increasing load. Postmortem examination shows significant internal damage to the pellets, including voids and cracks. These experiments have been used ... continued below

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7 p.

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KANESHIGE,MICHAEL J.; RENLUND,ANITA M.; SCHMITT,ROBERT G. & WELLMAN,GERALD W. October 14, 1999.

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

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Description

We report progress of a continuing effort to characterize and simulate the response of energetic materials (EMs), primarily HMX-based, under conditions leading to cookoff. Our experiments include mechanical-effects testing of HMX and FIMX with binder at temperatures nearing decomposition thresholds. Additional experiments have focused on decomposition of these EMs under confinement, measuring evolution of gas products and observing the effect of pressurization on the solid. Real-time measurements on HMX show abrupt changes that maybe due to sudden void collapse under increasing load. Postmortem examination shows significant internal damage to the pellets, including voids and cracks. These experiments have been used to help develop a constitutive model for pure HMX. Unconfined uniaxial compression tests were performed on HMX and LX-14 to examine the effect of binders on the deviatoric strength of EM pellets, and to assess the need of including deviatoric terms in the model. A scale-up experiment will be described that is being developed to validate the model and provide additional diagnostics.

Physical Description

7 p.

Notes

OSTI as DE00013971

Medium: P; Size: 7 pages

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  • 1999 JANNAF PSHS Subcommittee Meeting, Cocoa Beach, FL (US), 10/18/1999--10/21/1999

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  • Report No.: SAND99-2666C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 13971
  • Archival Resource Key: ark:/67531/metadc618524

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  • October 14, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 11, 2017, 3:34 p.m.

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KANESHIGE,MICHAEL J.; RENLUND,ANITA M.; SCHMITT,ROBERT G. & WELLMAN,GERALD W. Mechanical Response and Decomposition of Thermally Degraded Energetic Materials: Experiments and Model Simulations, article, October 14, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc618524/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.