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International Journal of Energetic Materials and Chemical Propulsion
ESCI SJR: 0.149 SNIP: 0.16 CiteScore™: 0.29

ISSN Druckformat: 2150-766X
ISSN Online: 2150-7678

International Journal of Energetic Materials and Chemical Propulsion

DOI: 10.1615/IntJEnergeticMaterialsChemProp.v6.i3.10
pages 269-287

FRENCH AND GERMAN TEST METHODS TO CHARACTERIZE LOW SENSITIVE GUN PROPELLANTS

Barbara Baschung
ISL, French-German Research Institute of Saint-Louis, BP 34 F-68301 SAINT-LOUIS, France
D. Grune
ISL, French-German Research Institute of Saint-Louis, BP 34 F-68301 SAINT-LOUIS, France
Gert Pauly
German Armed Forces Technical Center, WTD 91, Postfach 1764, D 49707, Meppen
C. Reynaud
SME, Centre de Recherches du Bouchet, 91710 Vert Le Petit
S. Schaefer
German Armed Forces Technical Center, WTD 91, Postfach 1764, D 49707, Meppen

ABSTRAKT

An insensitive munition (IM) is one that will not detonate under any conditions other than its intended mission to destroy a target. This is the common definition of insensitive ammunition. One part of such ammunition is the energetic propellant charge. Since it is possible to initiate the detonation of each energetic mass, the test methods for the characterization of "low" sensitive gun propellants are presented in this paper.
The following points have to be taken into account for the safety tests:
1.) high temperature, fire, blast (shock wave), fragments, and storage life during the storage of the propellant and the ammunition;
2.) sufficient mechanical properties against pressure, acceleration, the so-called grain pressure, and propellant temperature during the mission of the gun propellant in the weapon.
Therefore, two different types of safety tests are taken into consideration: one for the capability to detonate or deflagrate based on the chemical composition, and the other based on the mechanical behavior of the granular propellant charge.
Besides the common tests (shaped charge jet, fast cook-off, slow cook-off, sympathetic detonation tests, etc.), the different loads related to the propellant charges and grains are pointed out and discussed with respect to burning behavior and safety. The results of different tests conducted with several propellants are presented and conclusively discussed.
Although the test methods between France and Germany are partly distinct, the determined reaction types are comparable. A highly sensitive behavior with the reaction I type (i.e. detonation) is observed for the nitrocellulose propellant D6040 according to the French as well as the German test methods. In the case of double- and triple-base propellants (F5600, L5460, N6540), behaviors corresponding to reactions of the III to IV types are determined.


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