Breakup Time of Zirconium Shaped Charge Jet

2013 ◽  
Vol 38 (5) ◽  
pp. 703-708 ◽  
Author(s):  
T. Elshenawy ◽  
Qing Ming Li
Keyword(s):  
Shaped Charge ◽  
Shaped Charge Jet ◽  
Breakup Time

Calculation of jet characteristics from hydrocode analysis

2019 ◽  
Author(s):  
Justin C. Sweitzer ◽  
Nicholas Peterson ◽  
Scott Hill
Keyword(s):  
System Integration ◽  
Shaped Charge ◽  
Physical Parameters ◽  
Stretch Rate ◽  
Time Calculation ◽  
Semi Empirical ◽  
Analytic Models ◽  
Shaped Charge Jet ◽  
Jet Characteristics ◽  
Breakup Time

Abstract The penetration performance of a shaped charge jet is affected strongly by factors such as straightness, stretch rate, and breakup time. Straightness is related to manufacturing tolerances, assembly techniques, and system integration features. Stretch rate and breakup time are controllable features of charge design. A higher stretch rate is desirable for short standoff performance. The stretch rate is easily altered by a change of explosive or modification of the angle with which the detonation wave sweeps the liner surface, however, an increased stretch rate generally results in a decreased breakup time. Many of the recent gains in shaped charge performance have been made possible by increasing the effective breakup time of the jet. Several models exist for calculating breakup time. They include analytic models, such as Chou & Carleone’s dimensionless strain rate model, and empirical or semi-empirical models such as Walsh’s theory and those proposed by Pearson, et al. These models can be applied to raw hydrocode calculation data and used to determine a Jet Characterization (JC) file. The JC file can then be used to perform further calculations, such as Penetration Versus Stand Off (PVSO) curves. This paper details adaptation of the Chou & Carleone model for predicting breakup time using hydrocode data. The hydrocode is used to determine the physical parameters of the jet which are then extrapolated back to a virtual origin for breakup time calculation. This results in a model that is design independent, relying on hydrocode determination of jet variables. The model implementation will be discussed, and comparisons of predicted jet characteristics will be made to test data for several charge geometries.

Theoretical and experimental study on the effect of the external strong magnetic field on the shaped charge jet

2017 ◽  
Vol 31 (03) ◽  
pp. 1750018 ◽  
Author(s):  
B. Ma ◽  
Z. X. Huang ◽  
X. D. Zu ◽  
Q. Q. Xiao ◽  
X. Jia
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Strong Magnetic Field ◽  
Shaped Charge ◽  
Coupling Mechanism ◽  
Field Coupling ◽  
Magnetic Field Coupling ◽  
Shaped Charge Jet ◽  
Breakup Time ◽  
The Magnetic Field

The external strong magnetic field coupling with shaped charge is an effectively method to increase the penetration capability of the shaped charge jet. In this study, a theoretical model was developed to analyze the effect of the external strong magnetic field on breakup time and inhibition of rotation and drift of the shaped charge jet. The discharge current of the circuit system and the magnetic field of the shaped charge jet undergoing were calculated in detail. A series of depth of penetration (DOP) experiments were conducted to analyze the coupling mechanism between the external magnetic field and the shaped charge jet. Theoretical and experimental results indicated that the external strong magnetic field coupling with shaped charge jet can effectively improve the stability of the shaped charge jet, which the magnetic field can delay its breakup time and inhibit its rotation and drift. The ability of penetration of the jet produced by the Ø56 mm shaped charge is increased by 69.13% under the action of the external magnetic field.

An Empirical Shaped Charge Jet Breakup Model

2014 ◽  
Author(s):  
Ernest L. Baker ◽  
James Pham ◽  
Tan Vuong
Keyword(s):  
Shaped Charge ◽  
Jet Breakup ◽  
Shaped Charge Jet ◽  
Breakup Model
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