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Experimental characterization of reaction thresholds for polymer bonded high explosives under moderate mechanical loading

: Aurich, Hagen; Heider, Norbert; Denefeld, Vincent; Koch, Michael

Volltext urn:nbn:de:0011-n-5724425 (1.3 MByte PDF)
MD5 Fingerprint: 9ee1eb60da7af5a80e1fedc5a7ac8378
Erstellt am: 21.1.2020

Fraunhofer-Institut für Chemische Technologie -ICT-, Pfinztal:
Energetic materials. Past, present and future : 50th International Annual Conference of the Fraunhofer ICT, June 25-28, 2019, Convention Center, Karlsruhe, Germany
Pfinztal: Fraunhofer ICT, 2019
12 S.
Fraunhofer-Institut für Chemische Technologie (International Annual Conference) <50, 2019, Karlsruhe>
Konferenzbeitrag, Elektronische Publikation
Fraunhofer EMI ()

In modern munitions often polymer bonded high explosives (PBX) are used. During launching or impact of these munitions the PBX payload experiences high dynamical loading. These mechanical loads can lead to reaction processes and possible final explosion of the confined high explosive (HE). It is a dissipation mechanism controlled through a combination of pressure and shear stress loading of the reactive grains in the HE. The aim of the present work is to characterize threshold values for onset of this reaction process. For this purpose we developed an experimental set up, the so called safety threshold testing (STT) device and determined in an extensive test series the loading conditions that lead to the onset of reaction phenomena. Different reaction criteria are defined and evaluated experimentally and the method is applied to the PBX material HX 497. The results are the basis for the assessment of munitions safety during military operations.