Why Things Fail: from tires to helicopter blades, everything breaks

I'm really digging on Wired magazine's materials science coverage of late. I don't know if they're intentionally adding more reportage of materials or if it's a coincidence. I'm happy either way.

This month's issue has an article on Ford's Building 4 testing complex in which they test automotive parts - gas pedal hinges, engines, even entire vehicles - to failure and try to develop a failure analysis curve to show how long they can expect to have a part survive under typical circumstances. The article also covers Vextec - a failure analysis company - and their efforts to computerize the failure testing process, developing a way to model materials on the computer, create thousands of virtual versions of the material, and test each of them to failure without making and destroying thousands of prototypes, something that aligns wonderfully with the Materials Genome Initiative.

Good stuff here, plus it's about cars...always cool.

Point Pleasant Silver Bridge Part 2

Today is the 72nd anniversary of the failure of the Tacoma Narrows Bridge - a more famous bridge collapse here in the US than the one shown in the video here. I'll post that video in a bit, but this one caught my eye for MatSciWit because of the discussion of the failure detection methods used here to find out why the Point Pleasant Silver Bridge over the Ohio River collapsed in 1967. They video uses computer recreation and eye-witness testimony to explore the pitting corrosion, tension/compression in manufacturing, and material failure on the suspension bridge.

This is merely the middle of three parts to the video. Check out the other two after the jump...

Making Silicon Wafers and Computer Chips

Making Ferrofluid

A great presentation by Scientifiic Tuesdays that covers not only how ferrofluids work, but how to make your own!

Making Diamonds with a Blowtorch

This video creates some interesting discussions about how diamonds are made, natural and synthetic, as well as allotropes of carbon.  Its also fun to talk about the cost involved in this experiment and why its not worth running a blowtorch for 8 hours to make tiny diamonds.

Glass Works: How Corning Created the Ultrathin, Ultrastrong Material of the Future

Much happiness this month when my new issue of Wired showed up with an article titled "Glass Works: How Corning Created the Ultrathin, Ultrastrong Material of the Future". Then I read the full article and got a wonderful description of tempering (tension/compression) and substitution tempering (dipping in a molten potassium salt) to adjust the properties of the glass. Plus it's all about the Gorilla Glass's that's used in the iPhones (and other touch-screen technologies), so it's stuff the kids actually will know about.

Check out the full article at the link above.

Making Stuff Smarter Activity Clip

"The Three Stooges Effect...when the Three Stooges tried to get through a doorway at the same time, and they couldn't?"

"The cornstarch doesn't want to get out of its own way, so when you push on it really hard, it can't move out of the way fast enough. When you hit it really slowly, you can push through it like a liquid."

The 'fill a pool with cornstarch and water' demonstration never gets old.