Liquid Armor In Two Flavors: Shear Thickening and Magnetorheological

Liquid armor using shear thickening fluid (STF) is being developed at the U.S. Army Research Laboratory at Aberdeen Proving Grounds. The STF referred to in this article is made up of hard silica particles suspended in polyethylene glycol, a non-toxic fluid. Kevlar fiber vests soaked with STF are pliable under normal conditions:

"During normal handling, the [fluid] is very deformable and flows like a liquid. However, once a bullet or frag hits the vest, it transitions to a rigid material, which prevents the projectile from penetrating the Soldier's body," said Dr. Eric Wetzel, a mechanical engineer from the Weapons and Materials Research Directorate who heads the project team.
(From Army Creates Liquid Armor)

Liquid armor could be used in bomb blankets, and even jump boots, which could be made to stiffen upon impact to support the ankle.


(From Army scientists develop liquid body armor)

"Shear thickening" fluids (also called "dilatant" fluids) have unusual (that is, non-Newtonian) behavior in response to a shearing force. Their viscosities increase or decrease as the applied shearing stress changes. Cornstarch and water form a shear thickening fluid; when poked hard with a finger, the mixture reacts as a solid. However, if you place a "cube" of it on a table, it slowly flows into a puddle.

Not to be outdone, MIT has been working on a form of liquid armor that uses a class of fluids called magnetorheological fluids. They are made up of nanoparticles of iron in a thick oil or syrup suspension. When a magnetic field is applied, the iron particles align and the fluid becomes extremely stiff. The degree of stiffness varies depending on the strength of the field applied. It would be possible to wear comfortable, flexible armor that would become rigid at the flick of a switch.


(Fluid aligned to magnet [bottom left], from Instant Armor)

Update: Take a look at these recent stories:

See a science fictional take on this subject in an excerpt from an early Larry Niven story; the flexible armor suit is the earliest reference I can find in sf. See also the article on AKROD v2 knee rehabilitation device, which uses a similar fluid.

Scroll down for more stories in the same category. (Story submitted 4/26/2004)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 40 )

Related News Stories - (" Armor ")

DIY Taser-Proof Clothing
'His suit-shield sucked in the energy and discharged it...'- Philip K. Dick, 1954.

Look Great In Your Garrison Bespoke Bulletproof Suit
'McKie longed for his armored clothing…'- Frank Herbert, 1977.

Bionic Body Armor Makes You Dodge Bullets
Fascinating patent idea by IBM turns everyone - yes, everyone - into a bullet-dodging Neo.

Designer Bulletproof Fashion
Finally, a solution to that pesky assassination problem that you aren't ashamed to be seen in.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

 

Current News

The Living Tree House
'There were trees comprised of a central columnar trunk and four vast leaves...'

Flying Defibrillator Ambulance Drone
'The death-reversal equipment is on its way...'

High Fidelity Produces More Expressive Avatars!
'They are the audiovisual bodies that people use to communicate with each other...'

Physicists Build Repulsor / Tractor Beam
'Brandon swung mighty tractor beams upon the severed halves of the Jovian vessel...'

Will You Upload Your Mind Anytime Soon?
And if so, how long will the copy last?

Students! NASA Wants To 3D Print Your Tool Design In Space!
'Mass-produced only in the orbiting factories...'

Amazing ARES Augmented Reality Sandbox
'First he showed him where the input and output of his brand-new kingdom were, and how to program wars...'

'3D Light Sculpture' Projected Directly Onto Retina
'...projects directly on the retina of the eye…'

3D Printer Vending Machine Dispenses Dreams
'Nanofax AG offers a technology that digitally reproduces objects, physically, at a distance.'

Why Not Nurse Grandma With A Robot?
'She's made of a combination of springs, levers, acoustic instruments...'

Flock Of Minisats Will Image The Earth
'We... dropped roughly a thousand eyes on Beta Hydri IV.'

Should Robots Have Civil Rights?
'I've seen things... you people wouldn't believe...'

Robert Heinlein, Your Self-Driving Car Is Almost Ready!
'Mary Risling settled back for a little nap...'

The Manned Maneuvering Unit Story
'Little spurts of red-orange flame from the reaction pistol marked his companion's trail...'

Scheherazade, An Open Story Generator
'How can you compete with an IBM heavy-duty logomatic analogue?'

Sample The In Vitro Meat Cookbook
'I grabbed two Syntho-Steaks out of the freezer...'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.