Why Machines That Bend Are Better

күнү жарыяланды 2019-ж., 12-мар.
Compliant mechanisms have lots of advantages over traditional devices. SimpliSafe is awesome security. It's really effective, easy to use, and the price is great. Check out SimpliSafe here: simplisafe.com/veritasium
I visited the Compliant Mechanisms Research group at Brigham Young University and spoke to Professor Larry Howell:
At the above link, you can download 3D-print files to make some of the objects in the video, plus learn more about compliant mechanisms.
What I learned about compliant mechanisms I summarize in the 8 P's of compliant mechanisms:
1. Part count (reduced by having flexible parts instead of springs, hinges)
2. Productions processes (many, new, different enabled by compliant designs)
3. Price (reduced by fewer parts and different production processes)
4. Precise Motion (no backlash, less wear, friction)
5. Performance (no outgassing, doesn't require lubricant)
6. Proportions (reduced through different production processes)
7. Portability (lightweight due to simpler, reduced part count designs)
8. Predictability (devices are reliable over a long period of time)
Special thanks to Patreon supporters:
Donal Botkin, James M Nicholson, Michael Krugman, Nathan Hansen, Ron Neal, Stan Presolski, Terrance Shepherd
Animation by Alan Chamberlain


  • History: 20,000 BC: Tools are good 200 BC: Basic machinery is good 1100 AE: Precise machinery is good 1700 AE: Replaceable parts in precise machinery is good 2020 AE: Tools are good, if they are flexible

  • U mean the iPhone 6 plus?.......

  • Wow, this was a really interesting video, learned something new today!

  • Umm, springs have been around for a few years now...

  • What about metal fatigue and break down of crystalline structures? Does bendychines hold up better or worse than hinges, bearings and coiled springs?

  • Who was the girl?

  • .Fry: Bender, this has nothing to do with you. Bender: That's impossible!

  • guy should hit up #Vsause to get these in the #CuriosityBox

  • Ok KG-tv, i clicked it. You're happy now?

  • Regarding SimpliSafe: "The system is monitored 24/7 by professionals". So strangers are watching my webcam all the time? WTF?

  • i thought the thumbnail was something else at first

  • Since nuclear weapon systems are badly outdated in the US, I doubt this is used... kg-tv.com/tv/video-1Y1ya-yF35g.html

  • If you have to wear a suit to visit Utah No wonder I don't want to go back!

  • Excellent episode, bravo and thanks!

  • Please make a Pipe Wrench for 1" & 2" pipe. Please. For the love of god


  • I'm somewhat surprised that the DoD doesn't have some type of security umbrella over some of this.

  • are gpus and cpus gona get cheeper if they use this technology?

  • Annoying voice, you didn't even let the inventor to finish his phrases... lame "wanabe" . . .

  • The inventor was pretty badass, your questions, not so much. You lack modesty , a very valuable trait for an interviewer . . .

  • I can see its potential for new kind of toys.


  • iphone 6

  • bender would love this video :y

  • I love this prof 👍

  • I thought the thumbnail was sexy time.

  • WHOA

  • these selfie shoots are so annyoing, we dont need to see your face when you put your finger in the wrench

  • i kept seeing this video in my feed over the past several days... finally decided to click it. really cool stuff here...

  • Awesome video! Thank you very much! Incredible tech!

  • Polypropylene plastic ???


  • iPad Pro 2018: It's show time

  • I would have liked them to try to bend the titanium hinge in another direction. As comparison.

  • so with the compliant mechanism clutch you could make a manual transmission that has no clutch pedal?

  • Hahaha. Don't know what happens? Speculate sir.

  • wow

  • We should be funding more of these kind of research tho

  • Did anyone else notice some Chemistry there with Physicsgirl?

  • Finally! Geometry at full potential!

  • I DIDNT CONSIDER MYSELF A GREAT ENGINEER, but with with my practical experience, this stuff is really basic and already widely used in industry, no one should be too excited about this video. this type of stuff has been largely in practice for at least the past 20 years, im a little confused on why this was displayed as something new and special?????????

  • I always wondered how that clutch works in a chain saw

  • I never had any doubt about the performance and simplicity of these mechanisms, but I was always very skeptical about their durability. Take the titanium hinge, for example. I was impressed by the durability of the plastic grabber, but metals are a completely different story. Metals bend and permanently keep their new metallic shape. How many times can that hinge go from -90 to 90 and back until the metallic bonding of the titanium permanently breaks down? More importantly, how does one test its strength once it is in use? I don't want to see that hinge used on an important satellite in outer orbit if we have no way of making sure it is properly maintained. Machines with separate parts show symptoms of particular pieces becoming worn out, but a mechanism made up of only one piece doesn't.

  • That’s just a freaking spring though..

  • he has a funny giggle.

  • looking at the thumbnail I keep seeing two people having sex.

  • I had the same face as the professor every time he was interrupted lol.

  • *I am Bender, please insert girder*

  • Wow, mechanism is really interesting

  • Bender Bending Rodriguez likes this

  • damn buddy those veneers stick out like youre bugs bunny 🤦‍♂️

  • he had my attention when he mentioned my home state

  • 7:50 is just so unreal.

  • Hhhhh Bunch of Stupids

  • Airplanes bend

  • Some cool stuff, some theory, some NASA bs...everything I expect from this channel.

  • so iPad Pro 2 are better iPad ?

  • These devices are great catalyst for thinking about new ways to do things. However my problem with these devices they have very low cyclical Properties. Ie built in failure rate for things such as switches in automobile windows. Ford, GM, and Chrysler want things to fail in a timely manor. After all if they lasted for ever who would buy replacements? Especially for consumers items. For a one time device like a nuclear bomb I am all in. Seeing this video reminds me of the wizard of OZ movie! They want you to see one thing but not what it really is.

  • Research Flat Earth

  • Mechanically compliant engines?

  • What about Scissors?

  • The elephant reminds me of a student presentation I sat in on at AIAA DCAS. The project involved using a water tunnel and taking measurements of a wing with a control surface. The control surface was deflected to different angles. The presenter realized the night before the presentation while making slides in the hotel that the control surface was moving towards and away from the wing along with being rotated. All of their calculations were made assuming that gap was constant. OOPS! It was still a great presentation, honestly it was one of the most well presented that year. Live and learn :)

  • There are less points of failure but probably less durability as well, meaning either system would work well, unless you were placing them in a place where you cannot access, like a satellite in space, or the hair trigger of a nuclear weapon, not in a tool box - the idea of flexible parts is cool, but its not useable - and moving in this direction would be bad as now our tools would have planned obsolescence, but the landfills would love us!

  • Reusable fuses are an example of compliant mechanisms we learned in physics. When the wire gets hot it bends and removes contact until it cools down again.

  • I too can build useless things, like my kids

  • This is amazing.

  • Watching this makes me inspired to get my Mechanical Engineering degree asap lol

  • Would you be apply these concept with composite metals?

  • I wonder how much if any byu got paid

  • iPhone 6 has joined the chat

  • Cool stuff (also see MEMS)! An unmentioned but critical consideration is the strength of the thin, flexible domains and what loads are applied. Also, for many of the illustrations, there were no load limiting protective bumpers or range-of-motion limiters. We've been using these things since the '90s at the latest.

  • didn't get a million cycles out of the "compliant" gas pedal in my car, had to pop rivet a piano hinge to it.....

  • That’s weird to see the elephant mechanism even though I guessed it wouldn’t move.

  • Finally youtube recommend me real knowledge

  • Does anyone else see the aphex twin logo in the thumbnail?

  • You like FLEXURES? do ya? here Dan's channel is VERY educational) : kg-tv.com/tv/video-PaypcVFPs48.html

  • 4:48 is this how chicken head work ?

  • How can i get a hold of one of those magical elephants? (I am serious)

  • Plundering poluttion per plastic part produced

  • I never thought I'd find one piece items so freaking interesting. :o

  • Pretty girls at BYU

  • Great video.

  • Dianna is incredible and perfect... I know you get this a lot, but seriously, you shouldn’t let her get away

  • yeah but when a single-piece object breaks you may not be able to fix it (or just not a good idea to do it) meaning you'll have to replace it with a new one, talking about taking it to space it means you have to store several backups meaning more weight to carry leaving you on the same spot you were with an object made out of little parts. take cars for example, made out of lots of pieces, yes it also increases the chances of a fail but its also easier to find the damage and repair it even faster. but yeah we get the idea, just have to make it reliable enough for the task.

  • bending steel ... welp hope in humanity restored.

  • That is awesome

  • Bender Bending Rodriguez approves of this.

  • Great episode, you can 3D print titanium?

  • i bet that guy could make a masterpiece complication watch

  • subscribed

  • My eyes about popped out of my head when i saw the titanium.

  • Perhaps some counter arguments ???

  • Bender be like hold my beer...

  • At 1:10 we observe the elusive dueling smart people pinch

  • imagine the possibility to create mechanics without the need to make round springs.

  • The problem is that if it's broken, you can't fix it. You have to replace it.

  • thought this said "Why Vending Machines That Bend Are Better" i was wrong

  • Am I the only person that sees Freddie Mercury instead of the guy?

  • I disagree with the comparison to vice grips; Better compared to standard pliers. Otherwise, cool