Mechanics of Composite Materials EML4230 EML6232
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Liquid Body Armor or ARL: Shear Thickening Fluid
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Page Numbers of Book: Pages 24– 26 Aramid Fibers
Last Accessed:
3 October 2012
Summary:
This video discusses how fiber weaves of Kelvar can be suspended in
a matrix of shear thickening fluid to increase it's protective
capabilities by a significant degree. When the composite material is
struck by a bullet or even a sharp point from a stabbing weapon, the
Kevlar fibers begin to yield and separate for the object; much more
so for the sharp point. This shearing stress causes the shear
thickening fluid to resist the shearing motion. The stronger the
shear the more resistance there is to oppose it. This reaction
happens instantaneously, stopping a knife almost completely. Summary Author: Michael Bornick |