Why Machines That Bend Are Better

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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:
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



12 mars 2019




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Commentaires 4 417
Shaneequa Naynay
Shaneequa Naynay Il y a minute
I really don't like the way you look lol
Run Il y a 2 minutes
At 10:52, 72 Hz is equivalent to 72 revs / s instead of 2, right?
Freigeist 20789
Freigeist 20789 Il y a 4 minutes
These are glorified springs, which will wear and can break sooner or later.
Josue R
Josue R Il y a 18 minutes
Bender Bending Rodriguez approves
GhostlyTeehee Il y a 19 minutes
how do they not snap?
Oli Infamous
Oli Infamous Il y a 19 minutes
This is Mind-blowing
mohamed jameel
mohamed jameel Il y a 25 minutes
Mind blown and i want to work and make some of these things. I think ill buy the book
Alainpbat Il y a 39 minutes
But I don't understand how those materials don't break. I thought applying force for an object under high tension would wear the object severely.
Todd 200 Endings Howard
how about a floppy hammer?
Ahri Il y a heure
I'm intrigued! It's been a while since my curiosity been spiked. Subscribed!
Jeroen de jong
Jeroen de jong Il y a heure
Look at the new escapement of watchmaker Girard Perregaux or the new Zenith watches. The swiss have been working with this for a decade.
Timmo Warner
Timmo Warner Il y a heure
This demonstrates one of my favourite things in life: No matter how old I get I will still encounter things I had never heard of or even imagined existed.
Bob Jimenez
Bob Jimenez Il y a heure
flexibility with flexible constraints.....endless manipulation is possible.....viola: the rubber band.
Ree man
Ree man Il y a heure
He sounds kinda like mayor West
D K Il y a heure
Why didn't you ask him how long the clutch would last? Is that better/worse than current clutch products? Also, I still don't really understand what the arming device does. If you had a better animation it would have helped me understand it.
Linnea westberg
Linnea westberg Il y a heure
sooo cooollll!
furripupau Il y a heure
Leslie Hounsfield designed the engine in his Trojan automobile with with a flexible connecting rod, because in his own mind this was "mechanically correct". I always thought this was funny. The engine was a duplex 2-stroke with two pistons on a Y shaped connecting rod, two small ends for the twin pistons with a common big end. Later copies of this design used a jointed connecting rod, increasing mechanical complexity, manufacturing complexity, weight, etc. Hounsfield's flexible connecting rod seemed like a compromise by conventional wisdom, but he was right - it is "mechanically correct".
FunkmasterRick Il y a heure
Wait, your neighbour's house got broken into and there was a police helicopter to respond? What kind of ridiculous rich neighbourhood do you live in? I'd be lucky if a car showed up within two hours.
AscendtionArc Il y a heure
Very cool to see.
Karg Bear
Karg Bear Il y a heure
Question: Doesn't bending material wear out the actuation point faster?
Sid Ho
Sid Ho Il y a heure
Derek looks like Elon Musk
Luan Cavalcanti
Luan Cavalcanti Il y a 2 heures
Otimo video. Parabéns!
IamGravel Il y a 2 heures
at first i read machines that blend. Reminds me of the Will it Blend videos from years ago
Kai Schoneweis
Kai Schoneweis Il y a 2 heures
Are you kidding? I could bend a girder to any angle - thirty degrees, thirty-two degrees... thirty-one... but I couldn't go on living once I found out what they were for.
Craze Dhark
Craze Dhark Il y a 2 heures
3am rn, this was on my recommended. I know. I dont know what going on with my life
oisiaa Il y a 2 heures
Ummmmm......nuclear secrets in a FRvid video?? Just because he "doesn't know" if it's being used, this could be extremely sensitive technology.
jwgmail Il y a 2 heures
centrifugal clutches are used in most scooters. on a motorcycle you shift gears.
Quinn Reynolds
Quinn Reynolds Il y a 2 heures
Why don’t more people use those plastic vice grips?
aymon verheij
aymon verheij Il y a 2 heures
Ah Il y a 2 heures
i really wanted to watch this cus the topic seemed interesting but your commentary and narration is so bad, and its extremely annoying how you kept interrupting the dude you were interviewing basically.
kopiledon Il y a 3 heures
Rocket scientist pfffffft! Compliant mechanism engineer rules.
Definitive Gaming
Definitive Gaming Il y a 3 heures
Wait, so you’re telling me that nukes don’t have a do not disturb?
Colin MacKenzie
Colin MacKenzie Il y a 3 heures
OMG!!!!! I am so onto this Thank You Thank You Thank You for giving me the means to help a friend
jeddak Il y a 3 heures
Amazing. Fantastic technology.
Laurence Bell
Laurence Bell Il y a 3 heures
5:55 "...and requires lubricant."
Poachedshell Il y a 3 heures
i guess the ipad pro is good
Abbreviated Reviews
Abbreviated Reviews Il y a 3 heures
I was thinking the whole time how I'd like to 3D print some of this stuff and then he's like "here you can print these and PLA". Awesome.
Eman Mann
Eman Mann Il y a 3 heures
Very commonly used on cheaper musical keyboards, replacing the separate hinge and spring found in the traditional mechanical design. In this case each octave can be molded as two seperate black vs. white key assemblies.
learners learners
learners learners Il y a 3 heures
Bend it like
Marco Aurélio Lima do Nascimento Junior
wow that is pretty awesome!!
Fresh guac
Fresh guac Il y a 3 heures
what about metal fatigue
Entropy Spawn
Entropy Spawn Il y a 3 heures
Hi, V-Sauce wannabe, this was actually a cool video, but, maybe next time don't lean so hard on youtube's recommendation system maybe?
Joshua Keddie
Joshua Keddie Il y a 3 heures
This new Aphex Twin song is great
Pedro Silveira
Pedro Silveira Il y a 4 heures
aren't this machines more exposet to fatigue rupture?
Jesse Grossbohlin
Jesse Grossbohlin Il y a 4 heures
This is so cool.
Captainllama Il y a 4 heures
#6 Proportions. No. The *_dimensions_* are reduced. But it's not a "p".
hentai nat
hentai nat Il y a 4 heures
I need a reality check, these are too trippy.
Antonio Garofalo
Antonio Garofalo Il y a 4 heures
even protein structure is flexible and one can consider a protein a tiny compliant machine. evolution selected this kind of machines for the advantages you have mentioned. easy to build/synthetize, "low price" in term of atoms, performance
iKillborn2kilNOE Il y a 4 heures
"My friend" physics girl hmmm😏
Billy Joe
Billy Joe Il y a 4 heures
Looks like youtube doesn't mind abstract pornography :)
Mark Maurer
Mark Maurer Il y a 4 heures
Umm, if a break in is getting a police helicopter, you should probably move. If not to get away from the insane criminals you need a helicopter to stop, then to get away from the super militarized police.
Evgeniy Zakutin
Evgeniy Zakutin Il y a 5 heures
Apple Butterfly Mechanism Keyboard
de0509 Il y a 5 heures
One thing it probably wont do is efficiency due to hysteresis losses
James Johnson
James Johnson Il y a 5 heures
Looks cool and all, but I'm sure Uri Geller would beg to differ! hahaha
SymbolicDeathwish Il y a 5 heures
Where can i get one of those elephants?!
Paul Mares
Paul Mares Il y a 5 heures
Bender Rodriguez agrees 👍
Samuel Vidal
Samuel Vidal Il y a 5 heures
This is subliminal advertising for iPhone 6 ^^
Zoutepoel Il y a 5 heures
Inspector Steve
Inspector Steve Il y a 5 heures
I think physics girl is more than just a friend.
Modern Assassin
Modern Assassin Il y a 5 heures
You can 3D print it.
Alex McCabe
Alex McCabe Il y a 5 heures
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
kinetic stop motion studio
U mean the iPhone 6 plus?.......
Snigginz Il y a 6 heures
Wow, this was a really interesting video, learned something new today!
Fred Derf
Fred Derf Il y a 6 heures
Umm, springs have been around for a few years now...
Regnar Ex DoomerX
Regnar Ex DoomerX Il y a 6 heures
What about metal fatigue and break down of crystalline structures? Does bendychines hold up better or worse than hinges, bearings and coiled springs?
Harsh Todarmal
Harsh Todarmal Il y a 6 heures
Who was the girl?
Sporting1210 Il y a 6 heures
.Fry: Bender, this has nothing to do with you. Bender: That's impossible!
Livin That Life
Livin That Life Il y a 6 heures
guy should hit up #Vsause to get these in the #CuriosityBox
Commander Shepard
Commander Shepard Il y a 6 heures
Ok FRvid, i clicked it. You're happy now?
dasKeks28 Il y a 6 heures
Regarding SimpliSafe: "The system is monitored 24/7 by professionals". So strangers are watching my webcam all the time? WTF?
bagus prasetio
bagus prasetio Il y a 6 heures
i thought the thumbnail was something else at first
Patrick Calija
Patrick Calija Il y a 7 heures
Since nuclear weapon systems are badly outdated in the US, I doubt this is used...
relentlessmadman Il y a 7 heures
If you have to wear a suit to visit Utah No wonder I don't want to go back!
Lucian Mihail
Lucian Mihail Il y a 7 heures
Excellent episode, bravo and thanks!
John Rambo
John Rambo Il y a 7 heures
Please make a Pipe Wrench for 1" & 2" pipe. Please. For the love of god
Chris Vijay
Chris Vijay Il y a 7 heures
That guy who cannot abide
I'm somewhat surprised that the DoD doesn't have some type of security umbrella over some of this.
Dejan Kostic
Dejan Kostic Il y a 7 heures
are gpus and cpus gona get cheeper if they use this technology?
Andrew Arrachie
Andrew Arrachie Il y a 7 heures
Annoying voice, you didn't even let the inventor to finish his phrases... lame "wanabe" . . .
Andrew Arrachie
Andrew Arrachie Il y a 8 heures
The inventor was pretty badass, your questions, not so much. You lack modesty , a very valuable trait for an interviewer . . .
gadswez Il y a 8 heures
I can see its potential for new kind of toys.
Srdjan TrAiL
Srdjan TrAiL Il y a 8 heures
Yasin Hasan
Yasin Hasan Il y a 8 heures
iphone 6
Maethen Dias
Maethen Dias Il y a 8 heures
bender would love this video :y
Green Papajas
Green Papajas Il y a 8 heures
I love this prof 👍
I have platinum depression
I thought the thumbnail was sexy time.
Kristaps Blomkalns
Kristaps Blomkalns Il y a 8 heures
labber Il y a 8 heures
these selfie shoots are so annyoing, we dont need to see your face when you put your finger in the wrench
k moods
k moods Il y a 8 heures
i kept seeing this video in my feed over the past several days... finally decided to click it. really cool stuff here...
LifeFull11 Il y a 9 heures
Awesome video! Thank you very much! Incredible tech!
Johnnie Guitar
Johnnie Guitar Il y a 9 heures
Polypropylene plastic ???
Doomples Il y a 9 heures
Mal Il y a 9 heures
iPad Pro 2018: It's show time
CaesarsSalad Il y a 9 heures
I would have liked them to try to bend the titanium hinge in another direction. As comparison.
Andoxico Il y a 9 heures
so with the compliant mechanism clutch you could make a manual transmission that has no clutch pedal?
Garth Algar
Garth Algar Il y a 9 heures
Hahaha. Don't know what happens? Speculate sir.
Edward st.antoine
Edward st.antoine Il y a 9 heures
Davin Yap
Davin Yap Il y a 10 heures
We should be funding more of these kind of research tho
Rhonnie Allan
Rhonnie Allan Il y a 10 heures
Did anyone else notice some Chemistry there with Physicsgirl?
necrucifer elemangel
necrucifer elemangel Il y a 10 heures
Finally! Geometry at full potential!
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