Optimization of the ballistic properties of an Advanced Composite Armor system: Analysis and validation of numerical models subject to high velocity impacts

2014 ◽  
pp. 481-492
Keyword(s):  
High Velocity ◽  
System Analysis ◽  
Numerical Models ◽  
Advanced Composite ◽  
High Velocity Impacts ◽  
Ballistic Properties ◽  
Composite Armor ◽  
Armor System

High Velocity Impact Properties Characterization of Nano-Phased Bi-Layered Body Armor

2011 ◽  
Author(s):  
Sirajus Salekeen ◽  
Mohammad G. Kibria Khan ◽  
Shaik Jeelani
Keyword(s):  
High Velocity ◽  
Body Armor ◽  
Ceramic Layer ◽  
Mechanical And Thermal Properties ◽  
Element Analysis ◽  
Alumina Layer ◽  
Gas Gun ◽  
Layer Composite ◽  
Ballistic Properties ◽  
Composite Armor

It has been already established by different investigators that addition of nano-reinforcements to plastics and fibers further enhances the mechanical and thermal properties of these materials. In this investigation, we have tested a bi-layer composite armor made of a ceramic layer and a nano-reinforcement infused epoxy layer. Our objective is to determine whether the infusion of nano-reinforcements in an epoxy layer enhances the ballistic properties of this bi-layer armor system. This bi-layered armor which was made of an alumina layer and a nano-infused epoxy layer was tested by a Fragment Simulating Projectile (FSP) method. Silica nanoparticles and multi walled carbon nanotubes (MWCNT) with a loading range of 0–1wt% were used for this purpose. Armors having the same thickness but made of only a single pure ceramic layer and a bi-layer composite made of a ceramic layer and a neat epoxy layer were also tested for comparison purposes. A gas gun with high velocity projectile was used to perform the experiment. A striking velocity of about 400m/s was used to hit the target armor plate. The striking velocity of the projectile was obtained by maintaining a breach end pressure of helium gas in the gas gun at about 500 psi. The striking velocity was chosen at a level which was well above the ballistic limits of the armor materials. A finite element analysis was also performed to evaluate the ballistic properties of the composite armor and to compare those with the experimental data. Numerical and experimental results for the residual velocity of the piercing bullets were found to be in good agreement. Details of the experimental and numerical data are presented in this paper.

scholarly journals Numerical Evaluation of a Light-Gas Gun Facility for Impact Test

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
C. Rahner ◽  
H. A. Al-Qureshi ◽  
D. Stainer ◽  
D. Hotza ◽  
M. C. Fredel
Keyword(s):  
High Velocity ◽  
Numerical Evaluation ◽  
Impact Test ◽  
Experimental Tests ◽  
Reservoir Pressure ◽  
One Stage ◽  
Gas Gun ◽  
Numerical Predictions ◽  
High Velocity Impacts ◽  
Different Types

Experimental tests which match the application conditions might be used to properly evaluate materials for specific applications. High velocity impacts can be simulated using light-gas gun facilities, which come in different types and complexities. In this work different setups for a one-stage light-gas gun facility have been numerically analyzed in order to evaluate their suitability for testing materials and composites used as armor protection. A maximal barrel length of 6 m and a maximal reservoir pressure of a standard industrial gas bottle (20 MPa) were chosen as limitations. The numerical predictions show that it is not possible to accelerate the projectile directly to the desired velocity with nitrogen, helium, or hydrogen as propellant gas. When using a sabot corresponding to a higher bore diameter, the necessary velocity is achievable with helium and hydrogen gases.

Design and finite element study of Kevlar based combat helmet for protection against high-velocity impacts

2021 ◽  
Author(s):  
Clifton Stephen ◽  
B. Shivamurthy ◽  
Rajiv Selvam ◽  
Sai Rohit Behara ◽  
Abdel-Hamid I. Mourad ◽  
...  
Keyword(s):  
Finite Element ◽  
High Velocity ◽  
Finite Element Study ◽  
High Velocity Impacts ◽  
Element Study

Dynamics and structural transformations of carbon onion-like structures under high-velocity impacts

Carbon ◽  
2021 ◽  
Author(s):  
M.L. Pereira Júnior ◽  
W.F. da Cunha ◽  
R.T. de Sousa Junior ◽  
G.D. Amvame Nze ◽  
D.S. Galvão ◽  
...  
Keyword(s):  
High Velocity ◽  
Structural Transformations ◽  
Carbon Onion ◽  
High Velocity Impacts

scholarly journals Numerical analysis of high velocity impacts on unidirectional laminates

2014 ◽  
Vol 107 ◽  
pp. 629-634 ◽  
Author(s):  
J. Pernas-Sánchez ◽  
J.A. Artero-Guerrero ◽  
J. Zahr Viñuela ◽  
D. Varas ◽  
J. López-Puente
Keyword(s):  
Numerical Analysis ◽  
High Velocity ◽  
High Velocity Impacts

The structural and dynamical aspects of boron nitride nanotubes under high velocity impacts

2016 ◽  
Vol 18 (22) ◽  
pp. 14776-14781 ◽  
Author(s):  
Leonardo D. Machado ◽  
Sehmus Ozden ◽  
ChandraSekhar Tiwary ◽  
Pedro A. S. Autreto ◽  
Robert Vajtai ◽  
...  
Keyword(s):  
Boron Nitride ◽  
High Velocity ◽  
Boron Nitride Nanotubes ◽  
High Velocity Impacts

This communication report is a study on the structural and dynamical aspects of boron nitride nanotubes (BNNTs) shot at high velocities (∼5 km s−1) against solid targets.

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