Initiation and Overdriven Detonation of High Explosives Using Multipoint Initiation

2019 ◽  
Vol 44 (4) ◽  
pp. 423-428 ◽  
Author(s):  
Junfeng Guo ◽  
Qingxuan Zeng ◽  
Guosheng Qin ◽  
Mingyu Li
Keyword(s):  
High Explosives ◽  
Overdriven Detonation

Effective use of overdriven detonation in high explosives

2003 ◽  
Author(s):  
Masahiko Otsuka ◽  
Hideyuki Morimoto ◽  
Shirou Nagano ◽  
Eiji Hida ◽  
Kenji Kuroki ◽  
...  
Keyword(s):  
High Explosives ◽  
Overdriven Detonation ◽  
Effective Use

The Performance of Pressure Vessel Using Concentric Double Cylindrical High Explosive

2004 ◽  
Vol 126 (4) ◽  
pp. 409-413 ◽  
Author(s):  
Toru Hamada ◽  
Yuichi Nakamura ◽  
Shigeru Itoh
Keyword(s):  
High Velocity ◽  
High Explosive ◽  
Maximum Pressure ◽  
Detonation Pressure ◽  
Low Velocity ◽  
High Explosives ◽  
Detonation Process ◽  
Set Up ◽  
Overdriven Detonation ◽  
Detonation Phenomenon

The detonation pressure from the steady detonation of high explosives is a characteristic. Nevertheless, in materials processing using high explosives, there are cases when the detonation pressure does not match the intended pressure. In this investigation, as a new method of generating the overdriven detonation effectively, a double cylindrical high explosive set up using two kinds of explosives was developed, and its basic performance is analyzed. The concentric double cylindrical high explosive set up was composed of a high velocity explosive and a low velocity explosive, and the overdriven detonation was performed in the low velocity explosive. In this experiment, the ion gap was set up in the high velocity explosive and low velocity explosive respectively, and the detonation velocity was measured. The detonation pressure was also measured by setting up a manganin gauge (Kyowa Electric Instrument Co., Ltd.,) at the position where the generation of the overdriven detonation phenomenon was expected. Furthermore, the overdriven detonation process of the concentric double cylindrical high explosive was continually observed by numerical analysis and the framing photography. From the experimental results, the very high pressure region including the mach stem was observed in the low velocity explosive, and the overdriven detonation phenomenon was confirmed. The maximum pressure value of the concentric double cylindrical high explosive set up was 2.3 times higher than the Chapman-Jouguet pressure of the single explosive.

Investigation of Jet Formation with Overdriven Detonation in High Density Explosive

2007 ◽  
Vol 566 ◽  
pp. 327-332 ◽  
Author(s):  
Hisaatsu Kato ◽  
Kenji Murata ◽  
Shigeru Itoh ◽  
Yukio Kato
Keyword(s):  
Numerical Simulation ◽  
Detonation Velocity ◽  
Tungsten Powder ◽  
High Density ◽  
Shaped Charge ◽  
Detonation Pressure ◽  
Jet Formation ◽  
High Explosives ◽  
Overdriven Detonation ◽  
Penetration Velocity

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.

High Explosives

1915 ◽  
Vol 80 (2067supp) ◽  
pp. 104-105
Author(s):  
L. S. Marsh
Keyword(s):  
High Explosives
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