scholarly journals Ballistic Performance of a Composite Metal Foam-ceramic Armor System

2014 ◽  
Vol 4 ◽  
pp. 151-156 ◽  
Author(s):  
Matias Garcia-Avila ◽  
Marc Portanova ◽  
Afsaneh Rabiei
Keyword(s):  
Metal Foam ◽  
Ballistic Performance ◽  
Foam Ceramic ◽  
Armor System

Crack Evolution from Ballistic Threats in Laminated Glass

2014 ◽  
Vol 608 ◽  
pp. 316-321
Author(s):  
Chidchanok Chaichuenchob ◽  
Pavadee Aungkavattana ◽  
Sujarinee Kochawattana
Keyword(s):  
Laminated Glass ◽  
Crack Evolution ◽  
Ballistic Performance ◽  
Cross Sectional ◽  
Typical Structure ◽  
Transparent Armor ◽  
Water Jet Cutting ◽  
Level 3 ◽  
Radial Cracks ◽  
Armor System

Laminated glass is widely used as safety material and transparent armor. Its typical structure is sandwich layers of glass sheets and Poly Vinyl Butyral (PVB) film. It is known that the ballistic performance of the laminated glass is highly influenced by its configuration. In this study, the damages from ballistic threats at level 3 according to NIJ standard in laminated glass were investigated. Laminated glass with various configurations was fabricated using rolling and vacuum techniques. The ballistic tests were performed and the resulting radial cracks, which intercept several circumferences on each sheet of glass, were quantified. It was found that the number of crack bifurcation and the configurations of laminated glass were significantly correlated. The tested specimens were also cross-sectional observed using water jet cutting machine so that, their ballistic penetration could be determined. The analysis results provide better understanding of crack evolution, leading to improved new transparent armor system.

scholarly journals Composites with Natural Fibers and Conventional Materials Applied in a Hard Armor: A Comparison

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1920 ◽  
Author(s):  
Fernanda Santos da Luz ◽  
Fabio da Costa Garcia Filho ◽  
Michelle Souza Oliveira ◽  
Lucio Fabio Cassiano Nascimento ◽  
Sergio Neves Monteiro
Keyword(s):  
Natural Fiber ◽  
Epoxy Composite ◽  
Natural Fibers ◽  
Ballistic Performance ◽  
Synthetic Fibers ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
National Institute Of Justice ◽  
Additional Protection ◽  
Armor System

Natural-fiber-reinforced polymer composites have recently drawn attention as new materials for ballistic armor due to sustainability benefits and lower cost as compared to conventional synthetic fibers, such as aramid and ultra-high-molecular-weight polyethylene (UHMWPE). In the present work, a comparison was carried out between the ballistic performance of UHMWPE composite, commercially known as Dyneema, and epoxy composite reinforced with 30 vol % natural fibers extracted from pineapple leaves (PALF) in a hard armor system. This hard armor system aims to provide additional protection to conventional level IIIA ballistic armor vests, made with Kevlar, by introducing the PALF composite plate, effectively changing the ballistic armor into level III. This level of protection allows the ballistic armor to be safely subjected to higher impact projectiles, such as 7.62 mm caliber rifle ammunition. The results indicate that a hard armor with a ceramic front followed by the PALF/epoxy composite meets the National Institute of Justice (NIJ) international standard for level III protection and performs comparably to that of the Dyneema plate, commonly used in armor vests.

Ballistic performance of composite metal foam against large caliber threats

2019 ◽  
Vol 225 ◽  
pp. 111032 ◽  
Author(s):  
Jacob Marx ◽  
Marc Portanova ◽  
Afsaneh Rabiei
Keyword(s):  
Metal Foam ◽  
Ballistic Performance

Effect of replacement strike-face material on the ballistic performance of multi-ply soft armor targets

2018 ◽  
Vol 89 (5) ◽  
pp. 711-725 ◽  
Author(s):  
Zherui Guo ◽  
Weinong Chen ◽  
James Zheng
Keyword(s):  
Stainless Steel ◽  
Energy Dissipation ◽  
Material Properties ◽  
High Performance ◽  
Ballistic Limit ◽  
Stainless Steel Mesh ◽  
Ballistic Performance ◽  
Gas Gun ◽  
The Impact ◽  
Armor System

In this study, the impact-face material of a multi-ply soft armor system was varied to different ratios and tested for the effects on the ballistic performance. It is known that the first few layers of multi-ply soft armor material typically fail inelastically near the system ballistic limit and can be replaced with a “sacrificial” material with other more desirable properties. Previous studies have determined that the ballistic performance of these hybrid systems is largely dependent on the amount of high-performance backing material. However, the extent to which the high-performance fabric can be replaced has yet to be fully quantified and examined. Materials of different properties, namely stainless steel mesh, Makrolon® polycarbonate sheets, and cotton, were used as replacement frontal material for 840 d Twaron® panels, and the hybrid panels were impacted by O1 tool steel right-circular cylinder projectiles fired using a single-stage smooth-bore gas gun. Results show that the ballistic performance is maintained up to a frontal material ratio of about 40%, and off-axis material properties play a role in energy dissipation.

Ballistic Performance of Sandwich Composite Armor System

2020 ◽  
Author(s):  
Shah Alam ◽  
Samhith Shakar
Keyword(s):  
Impact Resistance ◽  
Absorption Capacity ◽  
Sandwich Composite ◽  
Skin Thickness ◽  
Ballistic Performance ◽  
Backing Plate ◽  
Composite Armor ◽  
Corrugated Structure ◽  
The Impact ◽  
Armor System

Abstract This study focused on the design, modelling and the analysis of the dynamic response of composite armor system, constructed with Kevlar 29 as front skin, Alumina-ceramic filled in x shaped corrugated structure as core and bottom skin Kevlar 29 and T800S, in terms of residual velocity, energy absorption capacity and limiting velocity. The core cell size, height, thickness, skin thickness, etc., will be varied to get their influence on the impact resistance. The design parameter will be investigated for the sandwich composite armor with various configurations and stacking sequence of Alumina Ceramics, Kevlar 29 and T800S. The sandwich typically consists of front plate, core and backing plate, which will be impacted at different velocities starting at 100m/s till significant armor penetration. The ballistic limit velocity (V50) will be determined from the analysis. The non-linear explicit dynamic analysis and simulation results computed using the software ABAQUS will be validated by experiment. From the data obtained it can be suggested which composite armor has improved impact resistance and performance.

scholarly journals Ballistic Performance of Guaruman Fiber Composites in Multilayered Armor System and as Single Target

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1203
Author(s):  
Raphael Henrique Morais Reis ◽  
Larissa Fernandes Nunes ◽  
Fernanda Santos da Luz ◽  
Verônica Scarpini Candido ◽  
Alisson Clay Rios da Silva ◽  
...  
Keyword(s):  
Structural Integrity ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Epoxy Composites ◽  
Ballistic Performance ◽  
Single Target ◽  
The Us ◽  
Lethal Limit ◽  
First Time ◽  
Armor System

Multilayered armor systems (MAS) with a front ceramic layer backed by a relatively unknown Amazonian guaruman fiber-reinforced (Ischnosiphon koem) epoxy composites, as second layer, were for the first time ballistic tested against the threat of 7.62 mm rifle ammunition. The amount of 30 vol% guaruman fibers was investigated in three distinct configurations: (i) continuous aligned, (ii) 0–90° cross-laid, and (iii) short-cut randomly dispersed. Additionally, single-target ballistic tests were also carried out in the best MAS-performed composite with cross-laid guaruman fibers against .22 caliber ammunition. The results disclosed that all composites as MAS second layer attended the US NIJ standard with corresponding penetration depth of (i) 32.9, (ii) 27.5, and (iii) 29.6 mm smaller than the lethal limit of 44 mm in a clay witness simulating a personal body. However, the continuous aligned guaruman fiber composite lost structural integrity by delamination after the 7.62 projectile impact. By contrast, the composite with cross-laid guaruman fibers kept its integrity for subsequent shootings as recommended by the standard. The single-target tests indicated a relatively higher limit velocity for .22 caliber projectile perforation, 255 m/s, and absorbed energy of 106 J for the cross-laid guaruman fibers, which are superior to corresponding results for other less known natural fiber epoxy composites.

Sign in / Sign up

Export Citation Format

Share Document