Numerical Modeling of Impact Initiation of High Explosives

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We performed continuum mechanics simulations to examine the behavior of energetic materials in Ballistic Chamber Impact (BIC) experiments, using an Arbitrary Lagrangian-Eulerian code (ALE3D). Our simulations revealed that interface friction plays an important role in inducing the formation of shear bands, which result in 'hot spots' for ignition. The temperature localization during BIC impact was found to be significant in materials with high yield strength. In those materials, there are multiple locations inside shear bands can achieve temperatures exceeding the threshold temperature for reaction. In addition, we investigated the relevant parameters influencing the pressure profile of a BIC test by ... continued below

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Wu, C J; Piggott, T; Yoh, J & Reaugh, J May 31, 2006.

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We performed continuum mechanics simulations to examine the behavior of energetic materials in Ballistic Chamber Impact (BIC) experiments, using an Arbitrary Lagrangian-Eulerian code (ALE3D). Our simulations revealed that interface friction plays an important role in inducing the formation of shear bands, which result in 'hot spots' for ignition. The temperature localization during BIC impact was found to be significant in materials with high yield strength. In those materials, there are multiple locations inside shear bands can achieve temperatures exceeding the threshold temperature for reaction. In addition, we investigated the relevant parameters influencing the pressure profile of a BIC test by numerical analysis from a simple phenomenological model. To our surprise, we found that the peaks of BIC pressure profiles not only can be a result of multi-center chemical reactions, but can also arise from factors associated apparatus configuration.

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PDF-file: 16 pages; size: 0.3 Mbytes

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  • Report No.: UCRL-TR-221760
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/973646 | External Link
  • Office of Scientific & Technical Information Report Number: 973646
  • Archival Resource Key: ark:/67531/metadc931781

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  • May 31, 2006

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 7, 2016, 6:24 p.m.

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Wu, C J; Piggott, T; Yoh, J & Reaugh, J. Numerical Modeling of Impact Initiation of High Explosives, report, May 31, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc931781/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.