MEASUREMENT OF MATERIAL PROPERTIES OF DAMAGED ENERGETIC MATERIALS

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We recently conducted damaged experiments on three explosives (mechanical damage on LX-04 and thermal experiments on HPP and PBXN-9) and characterized the effect of damage on some material properties. The MTS equipment was used to apply compressive cycling to LX-04 pressed parts and the results showed that older LX-04 parts became mechanically weaker than newer parts. After repeated compressive cycling for over 20,000 times, older LX-04 parts failed but newer LX-04 parts survived. Thermal insults were applied to PBXN-9 and HPP at 180 C and 200 C, respectively in unconfined conditions for several hours. The thermally-damaged HPP sample suffered 12.0% ... continued below

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Hsu, P C; Hust, G; Dehaven, M; Chidester, S; Glascoe, L; Hoffman, M et al. March 10, 2010.

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We recently conducted damaged experiments on three explosives (mechanical damage on LX-04 and thermal experiments on HPP and PBXN-9) and characterized the effect of damage on some material properties. The MTS equipment was used to apply compressive cycling to LX-04 pressed parts and the results showed that older LX-04 parts became mechanically weaker than newer parts. After repeated compressive cycling for over 20,000 times, older LX-04 parts failed but newer LX-04 parts survived. Thermal insults were applied to PBXN-9 and HPP at 180 C and 200 C, respectively in unconfined conditions for several hours. The thermally-damaged HPP sample suffered 12.0% weight losses and a volume expansion of 20% was observed. Porosity of the damaged HPP increased to 25% after thermal exposure, which led to higher gas permeability. Burn rates of damaged PBXN-9 were 2 orders of magnitude higher than those of pristine samples but burn rates of damaged HPP were only slightly higher than those of pristine HPP. Small-scale safety tests (impact, friction, and spark) showed no significant sensitization when the damaged samples were tested at room temperature. Gas permeation measurements showed that gas permeability in damaged materials was several orders of magnitude higher than that in pristine materials. In-situ measurements of gas permeability at high temperatures were made on HPP samples and the results showed that the gas permeability increased by 3 to 4 orders of magnitude.

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PDF-file: 9 pages; size: 1.5 Mbytes

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  • Presented at: 14th International Detonation Symposium, Coeur D'Alene, ID, United States, Apr 11 - Apr 16, 2010

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  • Report No.: LLNL-CONF-425367
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 978900
  • Archival Resource Key: ark:/67531/metadc935492

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  • March 10, 2010

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  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 29, 2016, 7:37 p.m.

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Hsu, P C; Hust, G; Dehaven, M; Chidester, S; Glascoe, L; Hoffman, M et al. MEASUREMENT OF MATERIAL PROPERTIES OF DAMAGED ENERGETIC MATERIALS, article, March 10, 2010; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc935492/: accessed May 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.