DYMAT 2009
Volume 1, 2009
DYMAT 2009 - 9th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
Page(s) 367 - 372
Section Experimental Techniques
Published online 15 September 2009
DYMAT 2009 (2009) 367-372
DOI: 10.1051/dymat/2009052

Development of an experimental device for low velocity impacts on energetic material

P. Mateille1, 2, S. Coussy2, L. Daridon1, O. Arnould1, A. Fanget2 and E. Lapebie2

1  LMGC – UMR 5508/University of Montpellier 2, CC 048 Place Eugène Bataillon, 34095 Montpellier, France
2  Centre d'Études de Gramat, 46500 Gramat, France

Published online: 15 September 2009

Energetic materials are sensitive to “low” mechanical, chemical and thermal stresses, whose origin is probably linked to their microstructural damaging. The present study focuses on a composite propellant composed of ammonium perchlorate grains in a polyurethane binder (HTPB). To describe the thermo-mechanical behavior of this material, at the mesoscopic scale under low impact, drop weight tests are carried out under various experimental configurations, adding a high speed camera recorder and ante- and post-mortem X-ray microtomographies. Several modifications of the usual device are developed in order to explore as many experimental configurations as possible. Results obtained during validation tests of the modified device enable us to consider that it can give the required data for the identification and characterization of the damage mechanisms that could be part of the hot spots initiation process and reaction ignition under low impact.

© EDP Sciences 2009