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Optimal designing of soft body armour materials using ...

This paper reports the semi-blunt puncture behavior of fabrics impregnated with a shear thickening fluid (STF), which is a dispersion system of nano silica/polyethylene glycol (SiO2/PEG). The ...

A review of fibrous materials for soft body armour ...

These types of body armor are mostly made from high performance fibers, such as aramid or Ultra High Molecular Weight Polyethylene (UHMWPE) fibers and are widely used in personnel ballistic ...

Impact Resistance of Liquid Body Armor Utilizing Shear ...

The purpose of this study is to investigate the physics and concepts of shear thickening fluids and perform a computational CFD simulation of liquid body armors which consist of a combination of polyethylene glycol liquid and nanoparticles of silica.

Military Applications of Nanotechnology

A technology that is currently in development is the carbon nanotube (CNT) body armor. Carbon nanotubes are 117 times stronger than steel and can serve as bullet proof vests and helmets (Kristoff, 2017). There are some design limitations that are limiting the progress of this type of body armor and hence they are not on the market.

PACIFIER BODY ARMOR (PBA) by blackcloudstudios on DeviantArt

These soft and light components are filed with polyethylene glycol (PEG) mixed with nano-particles of silica to protect against penetrating mechanical injury. Standard exterior cover of the PBA is usually produced from cut resistant fabrics. The PBA armor supports custom modifications and is compatible with MOLEE and GLICE systems.

Advanced Body Armor Utilizing Shear Thickening Fluids

Advanced Body Armor Utilizing Shear Thickening Fluids ... – Ethylene glycol (EG) or polyethylene glycol (PEG) carrier fluid ... Material and Target Design

Briana Tran - Operations Manager - Intel Corporation ...

- Nanoparticle interactions with suspension liquids such as polyethylene glycol (PEG) ... performed studies on shear thickening fluids and body armor. ... • Design a lightweight and cost ...

PACIFIER BODY ARMOR (PBA) INGAME by blackcloudstudios …

These soft and light components are filed with polyethylene glycol (PEG) mixed with nano-particles of silica to protect against penetrating mechanical injury. Standard exterior cover of the PBA is usually produced from cut resistant fabrics. The PBA armor supports custom modifications and is compatible with MOLEE and GLICE systems.

Section E - LIQUID BODY ARMOR

V.2 STF Research The team knew the a significant portion of the project was to be dedicated to the shear thickening fluid. The team had to determine what particles were going to be suspended and what fluid they would be suspended in. Prior liquid body armor attempts used silica nanoparticles and then suspended them in polyethylene glycol.

Improvement of Stab Resistant Body Armor Using SiO2 ...

Enhancing a flexible body armor using the Shear Thickening Fluid theory (STF) with use of SiO2 nanoparticles has shown good results regarding the stab resistance. A completely new approach based on investigations demonstrates that silated silica particles with no addition of polyethylene glycol (PEG) has shown better results in stab resistance ...

Viscoelastic properties of monodisperse spherical silica ...

could be exploited in the design of damping and control devices, whereby the fluid can limit the maximum rate of flow through a highly nonlinear response[4]. LEE et al[5] and TAN et al[6] used the shear-thickening properties of the silica suspensions in ethylene glycol, polyethylene glycol (PEG) and water to make advanced body armor materials.

Development Of Stab Resistant Body Armor Using Silated

Development of Stab Resistant Body Armor Using Fumed SiO2 Nanoparticles Dispersed into Polyethylene Glycol (PEG) through Sonic Cavitation H. Mahfuz, F. Clements and J. Stewart Nanocomposites Laboratory, Department of Ocean Engineering, Florida Atlantic University, Boca Raton, FL 33431, [email protected] ABSTRACT

Liquid Armor - Wikipedia

Liquid Armour is a material under research by defense institutions and universities around the world including the United States Army Research Laboratory (ARL). Some of the earliest research in this area was performed at Massachusetts Institute of Technology and University of Delaware in 2003. Liquid armor was initially presented as a way to increase the survivability of soldiers in high risk ...

Dr. Victor Avisek Chatterjee - Research And Development ...

The present study utilizes rheological characterization of shear thickening silica-polyethylene glycol dispersions (of different material configurations in terms of packing fraction, particle size and continuous phase viscosity) to assess their performance and obtain the best STF material configuration for ballistic body armor applications ...

US7498276B2 - Advanced body armor utilizing shear ...

An armor composite material has been invented which contains a fabric which has been impregnated with shear thickening fluid. This invention offers a ballistic resistant material that is more flexible and less bulky than comparable, conventional ballistic fabric. The material in the alternative can be puncture resistant. The invented material offers superior ballistic performance and/or ...

Effects of silica morphology on the shear‐thickening ...

Due to its unique viscosity variation, STFs have attracted a lot of attention as soft body armor materials for impact protection. In this work, two kinds of STFs were designed using polyethylene glycol (PEG) and spherical or irregularly shaped silica particles.

Effect of molecular weight of polyethylene glycol on the ...

Polyethylene glycol (PEG) is a synthetic polyether that is readily available in a large range of molecular weights. As molecular weight increases, the viscosity and length of polymer chains increases. High molecular weight PEG is generally considered as a thickening or gel forming agent and appears to possess at least some hydrophobic nature.

Pacifier Body Armor (PBA) image - After Reset™ RPG - Mod DB

These soft and light components are filed with polyethylene glycol (PEG) mixed with nano-particles of silica to protect against penetrating mechanical injury. Standard exterior cover of the PBA is usually produced from cut resistant fabrics. The PBA armor supports custom modifications and is compatible with MOLEE and GLICE systems.

(PDF) Shear-thickening behavior of modified silica ...

design of the liquid body armor and damping control. devices during the last few decades ... The shear thickening fluids were prepared by dispersing silica nano-particles in polyethylene glycol ...

Design strategy for optimising weight and ballistic ...

Therefore, choice of particle size remains crucial for the design of STF reinforced soft armour panel. Numerous research works have been reported on the polyethylene glycol or PEG (dispersion medium) and silica nanoparticle (dispersed phase) based STF impregnated Kevlar® fabrics.

US7226878B2 - Advanced body armor utilizing shear ...

An armor composite material has been invented which contains a ballistic fabric which has been impregnated with shear thickening fluid. This invention offers a ballistic resistant material that is more flexible and less bulky than comparable, conventional ballistic fabric. The invented material offers superior ballistic performance compared to conventional ballistic fabric-based materials of ...

Body Armor Recent Developments - GlobalSecurity.org

Body Armor Recent Developments. New, reinforced helmets and body armor currently being fielded to the military represent just the tip of the iceberg in …

WO2004103231A1 - Advanced body armor utilizing shear ...

An armor composite material has been invented which contains a fabric which has been impregnated with shear thickening fluid. This invention offers a ballistic resistant material that is more flexible and less bulky than comparable, conventional ballistic fabric. The material in the alternative can be puncture resistant. The invented material offers superior ballistic performance and/or ...

Military Body Armor Advancements Through the Years ...

Scientists have been researching sheer thickening fluids (STF) for years. STF is a made up of a liquid, polyethylene glycol, and hard particles of silica. Researchers at the US Army are currently testing kevlar vests that are pre-soaked in STF liquid body armor. STF is a fluid with strange properties.

Ballistic Properties of Hybrid Thermoplastic Composites ...

The structural design of the samples improved the ballistic resistance after the bullets were shot. Some ... body-armor and lightweight vehicle-armor structures. ... polyethylene glycol …

Rheological behavior of concentrated silica suspension and ...

The objective of this study is to develop an advanced stab and/or ballistic proof material composed of shear thickening fluid (STF) and Kevlar composite fabric. In this study, we prepared STF using sphere silica and fumed silica as silica particles and ethylene glycol and polyethylene glycol (PEG 200) as medium fluid, respectively.

Effect of Alumina Addition on the Rheological Behavior of ...

Shear thickening fluids (STF) have attracted much attention in many applications including body armor. In this study, suspensions of silica colloidal particles and polyethylene glycol fluid were prepared at varying volume fractions φ = 0.3 to 0.52 and their rheological behavior was investigated. It was found that the suspensions exhibited a Newtonian behavior for φ < 0.4, whilst a shear ...

(PDF) Advanced body armor utilizing shear thickening fluids

One of the big advantages of using STFs in Kevlar body armor is that it can obtain the same or better properties than neat Kevlar, but using fewer layers of fabric, resulting in lighter and more ...

Sophie Chujun Zhang - Development Partner - Marine ...

•Researched on energy absorption material for body armor in term of sports and military application. •Fabricated auxetic foams from normal foam, and fabricated shear thickening fluid (STF) from Silica nanoparticles and polyethylene glycol (PEG). Improved the energy absorption by 40% with thin armor layer and 99.7% with thick armor layer.

Polyethylene Glycol: And Its Use in Body Armor by Dillon Flood

In body armor PEG acts as a strengthening agent allowing for body armor to be made using less Kevlar this in turn makes STF body armor potentially lighter stronger and more flexible than a traditional neat Kevlar piece of body armor. PEG's use in body armor …

US7825045B1 - Advanced body armor - Google Patents

An armor composite material has been invented which contains a fabric which has been impregnated with shear thickening fluid. This invention offers a ballistic resistant material that is more flexible and less bulky than comparable, conventional ballistic fabric. The material in the alternative can be puncture resistant. The invented material offers superior ballistic performance and/or ...

Homemade liquid armor | Physics Forums

Such armor is being still researched but is very promising, flexible, lightweight and can stop even heavy stabs with sharp pricker, maybe even bullets. Liquid armor itself is based on two components - non Newtonian fluid polyethylene glycol (probably PEG 200 or 600) and bigger part is filling of silica dioxide nanoparticles.

US20100269236A1 - Advanced body armor - Google Patents

An armor composite material has been invented which contains a fabric which has been impregnated with shear thickening fluid. This invention offers a ballistic resistant material that is more flexible and less bulky than comparable, conventional ballistic fabric. The material in the alternative can be puncture resistant. The invented material offers superior ballistic performance and/or ...

Soft armour design by angular stacking of shear thickening ...

This work provided a design idea for the body armor with high protective performance. View all citing articles on Scopus. Recommended articles (6) Research article. Shear thickening fluids using silica-halloysite nanotubes to improve the impact resistance of p-aramid fabrics. ... the influence of polyethylene glycol (PEG) additives with ...

Dynamic impact protective body armour: A comprehensive ...

However, considering the women body armor design challenge, a dedicated design and manufacturing of soft body armour based on their unique morphological differences for better protection and comfort are in great demand. ... etc.) in a dispersion liquid (water, polyethylene glycol, ethylene glycol, silicone oil, etc.). This helps to ...

Polyethylene glycol* - Wiley Online Library

Polyethylene glycol* Classification/MAK value: PEGs with average molecular weight of 200–600: 1000 mg/m3 Peak limitation category IV ... 4000 rat 70 mg/kg body weight 7 days 61 20 Carpenteret al. 1971 6000 man c 14 mg/kg body weight 12 h 96 n.d. Shaffer and Critchfield 1947

DIY ultralight Pistol & Stab Proof STF Armor | Hackaday.io

The higher energy rounds .500s&w, 10mm, 44mag will still cause excessive trauma so the soft armor needs a backer such as memory foam to absorb the impact. All you need is Kevlar ballistic grade (you can buy new panels or buy an old flak jacket) Polyethylene Glycol 200 (200 Molecular weight, DOT 3 Brake Fluid)