Étude De La Fragmentation De Matériaux Energétiques Compacts

Quidot, M.; Bertrand, A.; Bonthoux, Françoise

doi:10.1051/jphyscol:1985553

Cited by 1 publication

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“…This early work was largely concerned with ensuring that solid rocket fuel could withstand the conditions of blast-off and subsequent firings at high altitude. Recently interest has shifted to developing insensitive munitions that are not vulnerable to accidental initiation by, for example, projectile impact (Mellor et al 1988;Connor 1990;Kent & Pinchot 1991), and thus a number of groups have been studying the high strain rate mechanical properties of propellant materials over a range of temperatures (Murri et al 1982;Fong 1983Fong , 1985Bonthoux & Girodon 1985;Quidot et al 1985;Ho & Fong 1987 a, 6;Ho 1989). The aim of the work reported here was to investigate the conditions under which rapid deformation of double-base propellants (and their constituent parts) can lead to ignition, and to provide mechanical data for hydrocode modelling of impact initiation.…”

Section: Introductionmentioning

confidence: 99%

Impact sensitivity of propellants

Walley

Field

Palmer

1992

Proc. R. Soc. Lond. A

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This paper reports an experimental study of the rapid deformation and ignition behaviour of a number of cast double-base propellants both at room temperature and at temperatures below the glass transition of those compositions that were elastomer modified. A range of techniques were used to obtain stress/strain data on the materials. A drop-weight machine with transparent anvils was used in conjunction with a high-speed camera to observe the deformation behaviour during impact. The aim was to gain understanding of the key parameters leading to the impact initiation of propellants. The only propellants that ignited violently in solid disc form at room temperature were the conventional compositions, the most sensitive being a composite modified propellant containing aluminium and ammonium perchlorate. All compositions were sensitized if they contained gas spaces. In addition, all the elastomer modified compositions were sensitized by cooling them below their glass transition ( ca .210K). The mechanisms leading to ‘hot spot’ formation and ignition of the propellants are discussed.

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