Armed Polite Society
Main Forums => The Roundtable => Topic started by: gunsmith on May 24, 2017, 12:23:07 AM
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:cool:
https://www.airforcetimes.com/articles/air-force-academy-cadet-creates-goo-that-stops-bullets
Air Force Cadet 1st Class Hayley Weir has developed a goo that, when struck by a bullet, hardens enough to stop it.
Weir came up with the idea during an Air Force Academy chemistry class, during which she was given three materials to combine in a way that could both stop a bullet without shattering. Weir experimented with epoxy, Kevlar and carbon fiber, and consulted with a chemist who suggested swapping out the epoxy for shear thickening fluid.
Quote from real clear life dot com - pretty interesting
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The word is "thixotropic". It's not new; I would be surprised if this is a new application of it, but I guess it might be.
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I can't shake the notion that I've read about similar stuff before.
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DARPA's been playing with it for body armor for years.
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I always thought "thixotropic" meant something thinned out when agitated, so I looked it up:
https://en.wikipedia.org/wiki/Thixotropy
I thought this part of that wiki article was amusing, and I hate to point it out because it will surely result in thread drift:
Both cytoplasm and the ground substance in the human body is thixotropic, as is semen.[1]
I wonder how they discovered that one. ??? :D
It (the Cadet's mixture) stopped "a" bullet. Looked like a .22LR to me in the video, but hard to tell fer shore.
From the Air Force Times article: "The idea to separately use shear thickening fluid, Kevlar and carbon fibers as anti-ballistic materials is not new, but they’ve never been used together."
Add 3.8% of Silly Putty and they may have something there.
I'm not trying to diminish or nay-say the achievement, but it looks like the whole thing was puffed up a bit for some reason.
Terry, 230RN
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DARPA's been playing with it for body armor for years.
There was a movie some years ago, can't remember what it was, that had "liquid body armor."
One of the characters got across a downed power line and was essentially frozen in place (but fine) because the armor reacted to the electricity and formed a shell, locking him in place.
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If you google liquid body armor you'll get hits going back quite a few years.
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Everything is bullet resistent if you're brave enough.
I wonder how they discovered that one. ??? :D
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Non-Newtonian fluids have been a thing for a while. Corn starch and water will make an excellent one for demo sake. Folks have been trying to make a body armor out of it for a long while. It hasn't been practical yet.
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Everything is bullet resistent if you're brave enough.
Air is bullet resistant also. It slows down bullets, just not very quickly. =)
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Everything is bullet resistant if you're brave enough (http://herohog.com/images/anime/dildo.jpg).
(sorry, couldn't help myself)
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Why am I thinking that the body armor scene I'm describing was from a relatively recent (last 20 years or so) Bond movie?
Not sure if that's right or not, but it's sticking in my mind.
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I always thought "thixotropic" meant something thinned out when agitated, so I looked it up:
https://en.wikipedia.org/wiki/Thixotropy
""
Both cytoplasm and the ground substance in the human body is thixotropic, as is semen.[1]""
I wonder how they discovered that one. ??? :D
Terry, 230RN
Probably some Marines discovered that one :P