Investigation of Jet Formation with Overdriven Detonation in High Density Explosive

Abstract:

To increase largely the performance of shaped charge, it is required to generate detonation velocity much higher than CJ velocity or detonation pressure much higher than CJ pressure of existing high explosives. One solution is the application of overdriven detonation phenomena. In this study, the effects of overdriven detonation in tungsten loaded high density explosive on the performance of shaped charge were demonstrated by experiments and numerical simulation. Sample shaped charge was composed of the inner layer tungsten loaded high density PBX and outer layer high velocity PBX. Concentration of tungsten powder in high density PBX was varied from 20 to 60% in mass. The pressure of overdriven detonation in inner layer PBX was measured by PMMA gauge, and was shown to be higher than 50GPa. The experimental results showed that the initial jet velocity and jet penetration velocity in target plates were largely increased by the effects of the overdriven detonation in tungsten loaded high density PBX.

• Periodical: Materials Science Forum (Volume 566)
• Pages: 327-332
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.566.327
• Online since: November 2007
• Authors: Hisaatsu Kato, Kenji Murata, Shigeru Itoh, Yukio Kato
• Keywords: Double Layer Cylindrical Charge, High Density Explosive, Jet Velocity, Numerical Simulation, Over Driven Detonation, Shaped Charge, Tungsten Powder

References

[1] K. Tanaka, S. Fujiwara, M. Sellam, H. N. Presles, C. Brochet, and R. Cheret, Calculation of Overdriven Detonation In Nitromethane, Proceedings of the 4th Conference of APS Topical Group on Shock Waves in Condensed Matter, 515-518 (1987).

[2] H. Kato, K. Murata, T. Hamada, S. Itoh and Y. Kato, Overdriven detonation in high density explosives containing tungsten powder, Science and Technology of Energetic Materials, Vol. 67, No. 5, 153-158, (2006).

[3] K. Tanaka, Detonation Properties of High Explosives Calculated by Revised Kihara-Hikita Equation of State, Proceedings of the 8th Detonation Symposium, 548-557 (1985).

[4] Century Dynamics Inc., AUTODYN (Interactive Non-Linear Dynamic Analysis Software) Explosive Initiation User Manual Revision 4. 3 (2003).

[5] M. Sellam, H. N. Presles, C. Brochet, and R. Cheret, Characterization of Strong Detonation Waves in Nitromethane, Proceedings of the 8th Detonation Symposium, 425-430 (1985).

[6] J. Souletis, and J. Groux, Continuous Observation of Mach Bridge and Mach Phenomena, Proceedings of the 8th Detonation Symposium, 431-439 (1985).