Analysis of Shell Material Influence on Detonation Process in High Explosive Charge

Abstract:

The influence of the shell material (copper and silicon carbide) on the detonation process in cylindrical high explosive charge is experimentally and numerically investigated. We observed the significant differences of wave pictures in the detonation products and in the shells, which were due to differences in the sound velocities in the shells and rapid destruction of the ceramic shell under explosion loading. The specific features of a wave picture at the interface HE/ceramics due to desensitization of explosive under loading by an advanced wave in the shell were detected. Those features lead to decreasing of detonation pressure, blurring of the detonation front, and to increasing of mass velocity behind detonation front that is typical for under-compressed detonation. On the symmetry axis of HE charge in the ceramic shell behind the detonation front the long zone with practically constant pressure was observed. We have identified the mechanism of transmission of disturbances from the periphery to the symmetry axis of the HE charge. The source of the emergence of this zone is identified as transverse waves propagating directly behind the detonation front from the periphery to the symmetry axis of the HE charge.

• Periodical: Key Engineering Materials (Volume 715)
• Pages: 27-32
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.715.27
• Online since: September 2016
• Authors: Igor A. Balagansky*, Alexey Vinogradov, Lev Merzhievsky, Alexander Matrosov, Ivan Stadnichenko
• Keywords: Cylindrical High Explosive Charge, Detonation Process, Shell Material

References

[1] G. Eden, R.A. Belcher, The Effects of Inert Walls on the Velocity of Detonation in EDC 35, an Insensitive High Explosive, Proc. of the 9-th Int. Symp. on Detonation 1 (1989) 831-841.

[2] J. Aveille, N. Carion, J. Vacellier, J.M. Servas, Experimental and Numerical Study of Oblique Interaction of Detonation Waves with Explosive/Solid Material Interfaces, Proc. of the 9-th Int. Symp. on Detonation 1 (1989) 842-852.

[3] T.R. Neal, Perpendicular Explosive Drive and Oblique Shocks, Proc. of the 6-th Symp. on Detonation (1976) 602-611.

[4] G.J. Sharpe, J.B. Bdzil, Interactions of Inert Confiners with Explosives, J. Eng. Math. 54 (2006) 273-298.

DOI: 10.1007/s10665-005-9025-y

[5] I.A. Balaganskii, V.A. Agureikin, S.V. Razorenov et al, Influence of High Modular Ceramic Inert Wall on Propagation of Detonation in Condensed High Explosive Charges, Combustion, Explosion and Shock Waves 30 (1994) 674-681.

DOI: 10.1007/bf00755836

[6] I.A. Balagansky, I.F. Kobilkin, S.V. Razorenov et al, Influence of Wall of SiC Ceramics on Detonation Parameters in High Explosive Charges, Proc. of Int. Symp. on Chemistry of Shock Waves 2 (1991) 345-350.

[7] I.A. Balagansky, S.V. Razorenov, A.V. Utkin, Detonation Parameters of Condensed High Explosive Charges with Long Ceramic Elements, Proc. of the 10-th Int. Detonation Symp. (1993) 841-845.

[8] M.J. Murphy, E.L. Lee, A.M. Weston, A.E. Williams, Modeling shock initiation in Composition B, Proc. of 10th Int. Detonation Symp. (1993) 963-970.

[9] P.A. Urtiew, K.S. Vandersall, C.M. Tarver, F. Garcia, J.W. Forbes, Shock initiation experiments and modeling of Composition B and C-4, Proc. of 13th Int. Detonation Symp. (2007) 929-939.

[10] I.A. Balagansky, K. Hokamoto, P. Manikandan, A.D. Matrosov, I.A. Stadnichenko, H. Miyoshi, I.A. Bataev, A.A. Bataev, Mach Stem Formation in Explosion Systems, Which Include High Modulus Elastic Elements, J. of Appl. Phys. (2011).

DOI: 10.1063/1.3671063

[11] I.A. Balagansky, A.A. Stepanov, Numerical simulation of Composition B high explosive charge desensitization in gap test assembly after loading by precursor wave, Shock Waves 26 (2016) 109–115 DOI 10. 1007/s00193-015-0584-1.

DOI: 10.1007/s00193-015-0584-1