Shaped charge jet diagnostics with high-speed photography

An analysis of the penetration–explosion (PE) effects of four distributions of inactive/active composite jets shows that a well-designed inactive/active double-layer liner can promote composite jet damage. Penetration experiments were then carried out for shaped charge jets having a single inactive (Cu) liner or an inactive/active (Cu/Al) double-layer liner with variable liner height. The behaviors and firelight patterns of the different jets were captured by high-speed photography. The perforation, deformation area, and deflection were measured for each plate, showing that the Cu/Al jets have stronger PE effects. Numerical simulation shows that the tip of the composite jet generated from the full-height liner is only Cu, whereas for the other jet, from the double-layer liner, Cu is almost wrapped entirely by Al.

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Study on the Interference Process of Liquid Radial Reflux on the Stability of a Shaped Charge Jet

Applied Sciences ◽

10.3390/app11178044 ◽

2021 ◽

Vol 11 (17) ◽

pp. 8044

Author(s):

Youer Cai ◽

Xudong Zu ◽

Yaping Tan ◽

Zhengxiang Huang

Keyword(s):

Theoretical Analysis ◽

Composite Structure ◽

High Speed ◽

Side Wall ◽

Shaped Charge ◽

Bottom Plate ◽

Depth Of Penetration ◽

X Ray ◽

Shaped Charge Jet ◽

Filled Composite

The process of liquid radial reflux interference during jet penetration in a liquid-filled composite structure is divided in this study into three stages: bottom plate reflection interference, side-wall reflection interference, and side-wall secondary reflection interference. The calculation model of the velocity interval of the disturbed jet and the residual penetration depth of the jet has been established through theoretical analysis. Results show that the liquid-filled composite structure can interfere with the high-speed section of the shaped charge jet. The accuracy of the theoretical analysis in this paper has been verified through numerical simulation, X-ray, and depth-of-penetration experiments. Among the results, those of the X-ray experiment show that the liquid-filled composite structure has interference on the tip of the shaped charge jet, which provides a possibility for the application of the liquid-filled composite structure to ammunition safety and other extreme cases.

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FRACTURE PHENOMENA OF BRITTLE MATERIAL AGAINST A SHAPED CHARGE JET

International Journal of Modern Physics B ◽

10.1142/s0217979208046955 ◽

2008 ◽

Vol 22 (09n11) ◽

pp. 1475-1482 ◽

Cited By ~ 1

Author(s):

JOON HONG CHOI ◽

SOON NAM CHANG

Keyword(s):

Shock Wave ◽

Crack Growth ◽

High Speed ◽

Slow Crack Growth ◽

Fused Silica ◽

Shaped Charge ◽

Sonic Velocity ◽

Crystalline Quartz ◽

Single Crystalline ◽

Shaped Charge Jet

In order to study the protection behavior of brittle materials against a shaped charge jet, the jet penetration and the fracture behavior have been investigated by the series of photographs taken by the IMACON high speed camera. The examined materials were glass, fused silica, and single crystalline quartz. The trend of crack growth in BK7 glass and fused silica indicated conical shape. In the case of the single crystalline quartz, it was observed that the crack grows fast along the axis of crystal growth. The velocity of shock wave (~ 6km/sec) into glass and fused silica was faster than the sonic velocity. However, the velocity of shock wave in the single crystalline quartz showed to be similar to its sonic velocity. The ballistic protection capability of single crystalline quartz showing fast crack growth has been evaluated to be lower than that of fused silica which has relatively slow crack growth, although the quartz has higher physical and mechanical properties.

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Study on Shaped Charge Jet Initiation of Solid Rocket Motors

2019 15th Hypervelocity Impact Symposium ◽

10.1115/hvis2019-070 ◽

2019 ◽

Author(s):

Hao CUI ◽

Rui GUO ◽

Pu SONG ◽

Jinsheng XU ◽

Xiaohui GU ◽

...

Keyword(s):

High Speed ◽

Shaped Charge ◽

Solid Rocket Motors ◽

Rocket Motors ◽

Jet Impact ◽

Solid Rocket ◽

Battlefield Environment ◽

Shaped Charge Jet ◽

The Impact ◽

Jet Initiation

Abstract In order to study the mechanism of initiation of solid rocket motors under the impact of shaped charge jets, a shaped charge jet initiation test was experimentally studied to evaluate the safety of the motor under attack in the battlefield environment. The ex-perimental results indicated that the motor had a detonation reaction under the shaped charge jet impact. The response of the mo-tor was recorded by a high-speed camera. In addition, the mechanism of initiation of the propellant charge was evaluated using by numerical simulations. Pressure-time and reaction-time curves of propellants were analyzed in this paper.

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Effect of the high-speed impact of a shaped-charge jet on the strength of titanium alloys

Technical Physics ◽

10.1134/s1063784207020090 ◽

2007 ◽

Vol 52 (2) ◽

pp. 204-208 ◽

Cited By ~ 2

Author(s):

V. N. Minakov ◽

N. V. Minakov ◽

V. Yu. Puchkova ◽

N. D. Rudyk ◽

G. E. Khomenko

Keyword(s):

Titanium Alloys ◽

High Speed ◽

Shaped Charge ◽

High Speed Impact ◽

Shaped Charge Jet

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Crack divergence phenomena in tempered glass

Strength Fracture and Complexity ◽

10.3233/sfc-204002 ◽

2020 ◽

Vol 13 (3) ◽

pp. 115-129

Author(s):

Shin’ichi Aratani

Keyword(s):

Optimal Design ◽

High Speed ◽

Glass Plate ◽

Acute Angle ◽

Divergence Angle ◽

High Speed Photography ◽

Tempered Glass ◽

Thick Glass

High speed photography using the Cranz-Schardin camera was performed to study the crack divergence and divergence angle in thermally tempered glass. A tempered 3.5 mm thick glass plate was used as a specimen. It was shown that two types of bifurcation and branching existed as the crack divergence. The divergence angle was smaller than the value calculated from the principle of optimal design and showed an acute angle.

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