Experimental study of the small-diameter channel and shaped-charge jet penetration effect

2021 ◽  
Author(s):  
S.V. Fedorov ◽  
A.V. Babkin ◽  
S.V. Ladov
Keyword(s):  
Small Diameter ◽  
Shaped Charge ◽  
Factors Affecting ◽  
Penetration Effect ◽  
Channel Surface ◽  
Mechanical Factors ◽  
Air Channel ◽  
Shaped Charge Jet ◽  
Diameter Channel ◽  
Stretching Process

The paper focuses on experiments carried out to determine the effect of a small-diameter channel, passed by a shaped-charge jet before interacting with an obstacle, on its penetrating action. These experiments were conducted in relation to the study of the features of shaped-charge jet motion through the cavity of an elongated solenoid with electromagnetic stabilization of the jet stretching process. For this purpose, steel sleeves with a channel were installed in front of the shaped charge, which made it possible to simulate the mechanical factors affecting the shaped-charge jet when it moves in the air channel. For the conditions implemented in the experiments, it was found that in the absence of collisions of the shaped-charge jet with the channel walls, the penetration depth decreases insignificantly, i.e. within 5%. In experiments in which there were traces of contact interaction with the shaped-charge jet on the channel surface, a significant decrease in the penetrating action was recorded.

scholarly journals О постановке экспериментов по определению пробивной способности хвостовых участков кумулятивных струй

2021 ◽  
Vol 91 (5) ◽  
pp. 793
Author(s):  
С.В. Федоров
Keyword(s):  
Numerical Simulation ◽  
Continuum Mechanics ◽  
Short Distance ◽  
Axisymmetric Problem ◽  
High Strength ◽  
Shaped Charge ◽  
Two Dimensional ◽  
Penetration Effect ◽  
Steel Target ◽  
Shaped Charge Jet

According to the calculations, the penetration effect of shaped charges can be significantly increased (by 40–50 % in the case of a high-strength steel target) if due increasing the accuracy of their manufacture the lower speed threshold is reduced at which the penetration of the tail sections of the shaped-charge jet into the target is stopped. For experimental confirmation of these data, it is proposed to study in detail the penetrability of the tail sections of shaped-charge jets using cut-off rods made of high-density material located at a short distance from the shaped charge (less than its diameter) and designed to eliminate the faster part of the jet. Based on numerical simulation in the framework of a two-dimensional axisymmetric problem of continuum mechanics, possible parameters of the cut-off rods for generating solitary "tails" of shaped-charge jets with different velocities of the leading element are predicted.

scholarly journals Design Technique for Calculating Functional Parameters of a Rotating Shaped Charge with Preliminary Heated Liner

2020 ◽  
pp. 61-70
Author(s):  
A.S. Steshin ◽  
A.V. Babkin
Keyword(s):  
Time Moment ◽  
Local Maximum ◽  
Thermal Action ◽  
Shaped Charge ◽  
Material Strength ◽  
Preliminary Heating ◽  
Penetration Effect ◽  
The Law ◽  
The Moment ◽  
Shaped Charge Jet

The paper considers a separate issue of the shaped charge functioning, i.e., functioning of a rotating charge under preliminary thermal action on its liner. Estimates of two oppositely directed factors are provided: 1) increase in the shaped-charge jet dynamic plasticity (limit elongation coefficient); 2) increase in the jet susceptibility to centrifugal destruction. These factors are activated by preliminary thermal action on the shaped charge liner in the jet heated in excess of usual parameters. The so-called "thermal" increase in the limit elongation coefficient was estimated using empirical and theoretical dependences of this value on the shaped-charge jet parameters, and on the characteristics of its material. Strength dependence on temperature was accepted as linearly decreasing. Centrifugal factor was estimated based on the law of kinetic moment conservation taking into consideration the gradient nature of stretching and, up to a certain point, the radial thinning of jet elements. The moment of centrifugal and strength forces relationship reaching the critical value was accepted as the beginning of the jet element centrifugal destruction. From this time moment the jet radial extension started. The law of decompaction of its enlarging part was taken from studies previously conducted by the authors. It was demonstrated that the two considered factors acting in the opposite directions in a jet were in compliance with each other ensuring optimal preliminary heating of the liner and penetration effect with a local maximum.

Analytical Solution and Experimental Verification of Shaped Charge Jet Penetration

2006 ◽  
Author(s):  
Serkan Gozubuyuk ◽  
R. Orhan Yildirim
Keyword(s):  
Shaped Charge ◽  
Hydrodynamic Theory ◽  
Jet Formation ◽  
Factors Affecting ◽  
3 Dimensional ◽  
Finite Difference Equations ◽  
Dimensional Shape ◽  
Semi Empirical ◽  
Shaped Charge Jet ◽  
Analytical Expressions

In the scope of this study a one dimensional shape charge code was developed using analytical and semi-empirical approaches. The penetration part of the code is based on the hydrodynamic theory of penetration. The code is capable of modeling and visualizing of shaped charge liner collapse, jet formation and target penetration. Factors affecting the penetration were investigated by utilizing the developed code. Since the code is based on the solution of some analytical expressions rather than the solution of finite difference equations, the solution cost comes out to be enormously less than those of 2 or 3 dimensional hydrocodes. Some number of experiments was performed by using copper liners on steel target plates. The results were compared with the developed code and a good consistency was obtained.

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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