MESOSCALE MODELLING OF SHOCK INITIATION IN HMX-BASED EXPLOSIVES

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Description

Hydrocode calculations we used to simulate initiation in single- and double-shock experiments on several HMX-based explosives. Variations in the reactive behavior of theee materials reflects the differences between binders in the material, providing information regarding the sensitivity of the explosive to the mechanical properties of the constituents. Materials considered are EDC-37, with a soft binder, PBX-9601, with a relatively malleable binder, and PIBX-9404, with a stiff binder. Bulk reactive behavior of these materials is dominated by the HMX component and should be comparable, while the mechanical response varies. The reactive flow model is temperature-dependent, based on a modified Arrhenius rate. ... continued below

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21 p.

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Mulford, R. N. R. (Robert N. R.) & Swift, D. C. (Damian C.) January 1, 2001.

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Description

Hydrocode calculations we used to simulate initiation in single- and double-shock experiments on several HMX-based explosives. Variations in the reactive behavior of theee materials reflects the differences between binders in the material, providing information regarding the sensitivity of the explosive to the mechanical properties of the constituents. Materials considered are EDC-37, with a soft binder, PBX-9601, with a relatively malleable binder, and PIBX-9404, with a stiff binder. Bulk reactive behavior of these materials is dominated by the HMX component and should be comparable, while the mechanical response varies. The reactive flow model is temperature-dependent, based on a modified Arrhenius rate. Some unreacted material is allowed to react at a rate given by the state of the hotspot rather than the bulk state of the unreacted explosive, according to a length scale reflecting the hotspot size, and a time scale for thermal equilibration. The Arrhenius rate for HMX is wsumed to be the same for all compositions. The initiation data for different HMX-bwd explosives axe modelled by choosing plausible parameters to describe the reactive and dissipative properties of the binder, and hence the behavior of the hotspots in each formulation.

Physical Description

21 p.

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  • "Submitted to: Proc American Physical Society Topical Conference on Shock Compression of Condensed MAtter, to be held Atlanta GA, 25 to 29 June 2001."

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  • Report No.: LA-UR-01-3406
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975578
  • Archival Resource Key: ark:/67531/metadc931452

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 2001

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 6:04 p.m.

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Mulford, R. N. R. (Robert N. R.) & Swift, D. C. (Damian C.). MESOSCALE MODELLING OF SHOCK INITIATION IN HMX-BASED EXPLOSIVES, article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc931452/: accessed January 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.