Related Experiment Video
Updated: Oct 7, 2025
08:34
Visualization of High Speed Liquid Jet Impaction on a Moving Surface
Published on: April 17, 2015
11.7K
The Penetration-Explosion Effects of Differently Distributed Inactive/Active Composite Shaped Charge Jets
Jiacheng Peng1, Jianwei Jiang1, Jianbing Men1
1State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China.
Materials (Basel, Switzerland)
|January 11, 2022
Summary
A double-layer liner made of copper and aluminum significantly enhances the penetration-explosion (PE) effects of composite jets. This design promotes greater damage compared to single-layer liners, optimizing jet performance.
Area of Science:
- Materials Science
- Mechanical Engineering
- Explosives Engineering
Background:
- Composite jets are crucial for penetration-explosion (PE) effects.
- Understanding liner design is key to optimizing jet performance.
Purpose of the Study:
- To analyze the PE effects of composite jets with different inactive/active liner distributions.
- To investigate the impact of a double-layer (Cu/Al) liner on jet damage.
Main Methods:
- Comparative analysis of four inactive/active composite jet distributions.
- Penetration experiments using shaped charge jets with single (Cu) and double-layer (Cu/Al) liners.
- High-speed photography to capture jet behavior and firelight patterns.
- Measurement of plate perforation, deformation area, and deflection.
- Numerical simulation to analyze jet tip composition.
Main Results:
- The inactive/active double-layer liner effectively promotes composite jet damage.
- Cu/Al jets exhibited stronger PE effects compared to single Cu liners.
- High-speed imaging revealed distinct jet behaviors and firelight patterns.
- Perforation, deformation, and deflection measurements confirmed enhanced damage with Cu/Al jets.
- Numerical simulations showed Cu wrapped by Al in double-layer jets, unlike single-layer jets.
Conclusions:
- A well-designed inactive/active double-layer liner significantly enhances composite jet damage.
- The Cu/Al double-layer liner design offers superior penetration-explosion effects.
- Liner material distribution critically influences composite jet performance.
Related Concept Videos
01:14Free Jet
277
Free jets describe the flow of liquid exiting a reservoir through an opening into the atmosphere without resistance. The velocity (v) of the liquid jet is derived using Bernoulli's principle and expressed as:
277
01:30Impact
246
Impact occurs when two bodies collide, leading to the application of impulsive forces between them. Analyzing impact mechanics involves considering two colliding particles moving along a line known as the line of impact, which passes through their centers and is perpendicular to the contact plane.
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
246
01:12Rocket Propulsion In Empty Space - II
3.1K
The motion of a rocket is governed by the conservation of momentum principle. A rocket's momentum changes by the same amount (with the opposite sign) as the ejected gases. As time goes by, the rocket's mass (which includes the mass of the remaining fuel) continuously decreases, and its velocity increases. Therefore, the principle of conservation of momentum is used to explain the dynamics of a rocket's motion. The ideal rocket equation gives the change in velocity that a rocket...
3.1K
01:17Continuous Charge Distributions
7.5K
Imagine a bucket of water. It contains many molecules, of the order of 1026 molecules. Thus, although it contains discrete elements (molecules) at the microscopic level, macroscopically, it can be considered continuous. Small volume elements of water, infinitesimal compared to the bulk of the bucket's volume, still contain many molecules. Under this framework, quantized matter is approximated as continuous for practical purposes.
The electric charge can also be subjected to an analogical...
The electric charge can also be subjected to an analogical...
7.5K
01:13Rocket Propulsion in Empty Space - I
3.3K
The driving force for the motion of any vehicle is friction, but in the case of rocket propulsion in space, the friction force is not present. The motion of a rocket changes its velocity (and hence its momentum) by ejecting burned fuel gases, thus causing it to accelerate in the direction opposite to the velocity of the ejected fuel. In this situation, the mass and velocity of the rocket constantly change along with the total mass of ejected gases. Due to conservation of momentum, the...
3.3K
01:03Rocket Propulsion in Gravitational Field - II
2.4K
A rocket's velocity in the presence of a gravitational field is decreased by the amount of force exerted by Earth's gravitational field, which opposes the motion of the rocket. If we consider thrust, that is, the force exerted on a rocket by the exhaust gases, then a rocket's thrust is greater in outer space than in the atmosphere or on a launch pad. In fact, gases are easier to expel in a vacuum.
A rocket's acceleration depends on three major factors, consistent with the...
A rocket's acceleration depends on three major factors, consistent with the...
2.4K