The researchers have combined this “shear-thickening” liquid
with Kevlar to create a new bullet-proof material. The company is keeping
the chemical formula of the liquid a secret, but it works by absorbing the
force of the bullet strike and responding to it by becoming much thicker and
more sticky. The BAE scientists describe it as “bullet-proof custard”.
“It’s very similar to custard in the sense that the
molecules lock together when it’s struck,” explained Stewart Penny, business development
manager in charge of materials development at the company. Shear-thickening
liquids are not new to military research. The US Army Research Laboratories has
carried out tests using similar liquids. But, according to BAE, these
latest tests provide the first clear evidence that liquid armour could
effectively protect soldiers from bullets or shrapnel. They say the liquid
could ultimately be used to make much lighter, more flexible and more effective
bullet-proof vests for solidiers.
In the tests, scientists used a large gas gun to fire ball
bearing-shaped metal bullets at over 300 metres per second into two test
materials – 31 layers of untreated kevlar and 10 layers of kevlar combined with
the shear-thickening liquid.
“The Kevlar with the liquid works much faster and the impact
isn’t anything like as deep,” he explained. The results were presented to
journalists during a preview of future defence technology at BAE’s Advanced
Technology Centre in Filton, Bristol.
Source : http://realitypod.com
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