ehsnils Posted September 8, 2017 Share Posted September 8, 2017 How will this work in the winter? A Spanish company has designed a speed bump that won't hinder slow drivers but will still stop motorists driving too fast. The speed bump is filled with a non-Newtonian liquid which changes viscosity when pressure is applied at high velocity. http://www.businessinsider.com/speed-bump-badennova-non-newtonian-liquid-hard-soft-road-fast-slow-safety-2017-6?r=US&IR=T&IR=T Link to comment Share on other sites More sharing options...
DrD123 Posted September 8, 2017 Share Posted September 8, 2017 well, I would think it wouldn't be used in a location that they get snow and might run a snow plow... the temperature response is hard to say - no idea what the oil is or what the viscosity vs. temperature looks like for low strain rate loading - I imagine it would firm up a bit. The application looks more suited for interior structures than on a road (it's probably a whole lot more expensive than an asphalt or concrete speed bump, which would limit it's acceptance by folks, I would think.) Link to comment Share on other sites More sharing options...
ehsnils Posted September 8, 2017 Author Share Posted September 8, 2017 May be useful as a temporary speed bump around events and similar though. Link to comment Share on other sites More sharing options...
MilesA Posted September 8, 2017 Share Posted September 8, 2017 This fluid increases its viscosity in proportion to rate of pressure increase. It does not have to be water-based, it could be glycol-based or silicone-based, for instance, so it wouldn't freeze in cold weather. I'm totally guessing it's a suspension of silica particles in glycol in a rubber tube. Can't be anything too exotic or expensive. Link to comment Share on other sites More sharing options...
DrD123 Posted September 8, 2017 Share Posted September 8, 2017 May be useful as a temporary speed bump around events and similar though. absolutely - that would be a pretty ideal application! a number of the examples in the video look like they are modular/temporary. non-newtonian fluids are fun - corn starch in water is the classic "make your own" non-newtonian fluid. Link to comment Share on other sites More sharing options...
Penguin Posted September 9, 2017 Share Posted September 9, 2017 Nothing a cordless drill won't be able to fix. Link to comment Share on other sites More sharing options...
ehsnils Posted September 9, 2017 Author Share Posted September 9, 2017 Or shoot it. Or put it in front of a freight train. Link to comment Share on other sites More sharing options...
Knight705 Posted September 10, 2017 Share Posted September 10, 2017 studded snow tires or some tent stakes but to be honest, this sounds like a smart idea. tailor these bumps to the speed limit of the road and anything faster would turn these bumps into something more jarring. it would help with street racers. Link to comment Share on other sites More sharing options...
Hoojammyflip Posted September 14, 2017 Share Posted September 14, 2017 This fluid increases its viscosity in proportion to rate of pressure increase.... So motorcycles could zip straight through and trucks would have to crawl?? Link to comment Share on other sites More sharing options...
Humble Rumble Posted September 14, 2017 Share Posted September 14, 2017 I think it's more about the speed of the pressure than the strength of the pressure, but I could be mistaken. Non-newtonian liquids I've seen in the past seem to stiffen up to fast-moving points of pressure. 2012 Legacy 3.6R Build Thread 5th Gen Legacy BM/BR Body Kit Compendium Thread Link to comment Share on other sites More sharing options...
MilesA Posted September 15, 2017 Share Posted September 15, 2017 So motorcycles could zip straight through and trucks would have to crawl?? If you have kids try doing the science experiment with cornstarch and water. They love that and they get to make a big mess in the kitchen. Link to comment Share on other sites More sharing options...
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