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: 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



11 Mar 2019




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Physics Girl
Physics Girl 3 yıl önce
Such a good vid. You don’t get a sense for how they feel from the video. That’s the only disappointment. Why no haptics, Derek??
Jesus has given you all. Repent or die.
Repent to Jesus Christ!! ““I am sending you out like sheep among wolves. Therefore be as shrewd as snakes and as innocent as doves.” ‭‭Matthew‬ ‭10:16‬ ‭NIV‬‬ ht
DSChamber 71
DSChamber 71 Yıl önce
@smurphas ummm.... I have seen some very "unsmart" people right out of the gate, like verrrryyyyy slow.... I have even seen it in some families, one kid is naturally gifted and smart, next kid ummm no so much :)
KFJ Yıl önce
Why don't you two date? You look cute together. Plus you could probably make a very smart and very cute baby.
TheOg Yıl önce
@LP Jones i like that word "requisite". I suppose ill use at as inspiration to remain a virgin for the rest of my life. Shipping scientists til the day i die.
LP Jones
LP Jones Yıl önce
@TheOg And here we see the requisite virgin in the comments trying to ship two people that are already in separate relationships who are just friends and/or are professionals.
Nunezification Yıl önce
The clutch is actually a centrifugal clutch, exactly like the ones in the chainsaw, but the one in chainsaw have 2 or 3 springs, and those springs break all the time. So these parts would be much more efficient since they’re made out of one piece. Nice!
Quinn Shaw
Quinn Shaw 9 aylar önce
@David Gutierrez They demonstrated a steel version as well. Also, the plastic switching mechanism (yes, I know, not a clutch) was stated to have been torture tested to millions of actuations.
DSChamber 71
DSChamber 71 Yıl önce
@Nunezification no I’m talking about professional logging use… 8-10 hour days for 7-8 months a year. Clutch springs isn’t something I have seen break very often Tree juice eh… lol. That’s funny
Nunezification Yıl önce
@DSChamber 71 I worked for STIHL of America, we have designed hundreds of springs out of different material, all of them break due to hight temp, stress and even the juice that comes out of certain type of trees, we’re talking about everyday pro use, 8-10 hrs of use, with no cleaning in between, you probably only use them 1-2 hrs… thats nothing
DSChamber 71
DSChamber 71 Yıl önce
You haven't used chainsaws much to say that the clutch springs break "all the time". I have seen saws used every day for years on end and never once seen a clutch spring fail. Now that isn't to say I have never seen any fail, but the springs are made out of some very good spring steel and usually last years and years
Kevin Yıl önce
@arnerob123 he didnt say theyd last longer than traditional springs, although they might depending on material and design, but what he was saying is that replacing one big piece is easier than taking apart a big piece to replace smaller pieces inside. when the springs break, replacing the whole clutch would be too expensive, so he has to disassemble the clutch and replace the springs, but with a compliant centrifugal clutch, if the clutch breaks its one cheap piece so he can just replace the whole thing
karotto 10 aylar önce
This is amazing. As a mechanical engineering student, we are learning all the ways to prevent bending and shear, whilst you guys are taking advantage of it to make advanced mechanisms.
Lepi Doptera
Lepi Doptera Gün önce
@Keiya I am also not saying that everything has to be rigid. We have plenty of examples from biology that prove that flexible structures are useful. We make our planes fairly flexible so they can withstand turbulence without catastrophic structural failure. It just happens that most of our technology is built using rigid design. Time will tell if this will change.
Keiya Gün önce
@Lepi Doptera even these compliant mechanisms rely on having parts that don't bend as well as parts that do. No one is saying everything should be made out of floppy rubber, just that we're neglecting the uses of things designed to bend.
Sinan Sarikaya
Sinan Sarikaya 4 aylar önce
@Lepi Doptera Of course hydrodynamic and magnetic bearings are thing. But they still aren't compliant mechanisms and most of the time for many applications they're simply to complex, tedious and expenisve.
Sinan Sarikaya
Sinan Sarikaya 4 aylar önce
@Lepi Doptera My comment might have come off as a bit rude, due to the bad wording. Apologies. I wanted to highlight the absurdity of the headline of this video. I absolutely agree concerning the rigidity. Compliancy also implies a direct connection. I fail to understand how you would construct just any rotating mechanism (one that rotates several times around its axis) without two surfaces gliding against each other. Therefore you will always require bearings which in most cases should be anything but compliant.
Sinan Sarikaya
Sinan Sarikaya 4 aylar önce
@Lepi Doptera Really? Manufacturing is your only concern with this? You cannot build anything that spins with bending mechanisms. This already rules out anything from Turbines and Pumps up to wheels and power tools. Compliant mechanisms certainly have their place but they won't replace as much as people like to believe.
Linski Mi
Linski Mi Yıl önce
I work in an R&D lab of a Swiss watchmaking company, and I can tell you that compliant mechanisms are currently by far the hottest topic in research for mechanical watches. For example, they're used in the form of microfabricated oscillatorsmade of Silicon in the Frederique Constant Monolithic and the Zenith Defy Lab.
Michael Kortsen
Michael Kortsen 8 aylar önce
@Guiseppe Falzarano Like the man said, compliant mechanisms don't have the backlash of pin-and-hole hinges.
CME 11 aylar önce
@Guiseppe Falzarano The time inside a watch is literally kept by a hairspring, which you've guessed it, is as thin as a hair. This spring has been recently replaced by Zentih using the compliant mechanism etched on a silicon wafer, in their new watch called the Zenith Defy Lab. This breakthrough could actually mean mechanical watches could become more accurate than their quartz counterparts once again, all thanks to the compliant mechanisms
Guiseppe Falzarano
Guiseppe Falzarano 11 aylar önce
Flexible parts sound like a nightmare for longevity and accuracy. As a watch dude, you already know the lengths they go to minimize backlash and friction. Ruby bearings and escapement, precision machined everything. I could see flexible parts being used as part of a complication, but never towards the heart of the watch
TiyLum Yıl önce
Awesome but when am I going to get flexable phone
WesternUranus Yıl önce
One question I had while watching the video was : "How does it react to heat variation ?" I would say this one is especially relevant for mechanical watches applications
TamirD 8 aylar önce
Thanks to incredible people such as Professor Howell we as a species can evolve and get better. Science is amazing
CybranM 3 yıl önce
This is honestly one of, if not the best video you've made. Was great to learn so much about a topic I didn't even know existed.
sutil Al
sutil Al 2 yıl önce
@Nothing\ someone here remind me of your comment again, I may add that I notice even if people do research a new subject that they liked, with so many infos they hoard and or read and read but no retention because of the huge pieces of info that we read.. I basically read many hours per day and love many subjects .. what I notice is if I find a debate in such site and participate in such activity and write to them the info stick, otherwise you will be surprise the percentage of the thing we forget of what we learned.. 90% .. if we read it we retain 10%, if we read it and see it 30%, if we write it 60% ... if we talk about it even become higher. I wish that someone here tell us about good intelligent sites in this sea of info. now I am trying to slow down to read less and retain more rather than read and forget, and that require discipline
4gup 2 yıl önce
Josh -_-BAssAdsFserë
sutil Al
sutil Al 2 yıl önce
Nothing,/ you made a very smart point, that is exactly what I do, love to know people who think like you, would you imagine to be around 10 friends like that, the thing we will learn after sharing.. I am sure there must be a website or network a sort of club were people share knowledge beyond the basic.. and without reading 100 comment to find smart one.
Peter Gruhn
Peter Gruhn 3 yıl önce
See, my complaint is that I learned almost nothing. And that’s from a background of no previous knowledge of this topic.
Nothing\ 3 yıl önce
So, what more have you learned about this since you found out it exists? (I'm encouraging you to learn more). More people need to follow up on things they find like this which are interesting instead of being content with a 5 minute video which provides the illusion of learning, but teaches nothing of practical value. Which is fine, but if something's interesting,I just find such a video to be a tease more than insightful. Cheers.
Laurent Beaulieu
Laurent Beaulieu 9 aylar önce
That could be great in aerospace. Imagine a wing with adaptive flaps that just give you more lift at lower speed through movement by the speed itself.
Maple Glass Printing
Maple Glass Printing 3 aylar önce
Love the use of compliant mechanisms! Great work guys, soon we will 3D print a glass compliant mechanism :O
blackvalley007 Yıl önce
Another key factor for the increase in precision besides the elimination of play (backlash) is due to friction being almost eliminated. This eliminates hysteris, also known as virtual play. The precision error of a mechanism is the sum of its play and the virtual play components. I think that including some simple force/distance diagrams would have helped alot for understanding these concepts.
Riain Rising
Riain Rising Yıl önce
Amazingly efficient and impressive. The possibilities at the quantum level have suddenly come into perspective. Good video!
Shamino Ranger
Shamino Ranger Yıl önce
Professor Howell: "Here's my book, it's the most cited book in the field." He's flexing.
cessposter 20 gün önce
@Astéri the hell is a chexarch
Olga Sopilniak
Olga Sopilniak 4 aylar önce
My design professor told me to research compliant mechanisms for a project, and the only book available in the library about this topic was from this guy. I've read the book and found mind-blowing. The author deserves all the praise.
Arkanis 4 aylar önce
I see what you did there
Mr. Yeast 5Billion
Mr. Yeast 5Billion 5 aylar önce
@Mustachioed Organism God this comment is God tier.
ProWeen 5 aylar önce
shut up
Anton Strandberg
Anton Strandberg 11 aylar önce
This is absolutely amazing! Thank you for bringing this to our attention!
Steven Lightfoot
Steven Lightfoot 4 aylar önce
This is pretty cool, makes sense for some applications. My major concern would be stress and fatigue issues, of which they are obviously aware, and for which they have done some testing.
Chinmay Limaye
Chinmay Limaye Yıl önce
I really loved the idea of these machines and this type of mechanisms seriously need to be used more...thank you for the enlightenment.
Stephen Bridges
Stephen Bridges Yıl önce
FASCINATING! In slow motion some of these components are still deceptively clever. Modeling the 'snap' point of such materials must be complicated, to the point that trying different materials, widths, and angles are no doubt exhaustively checked during prototyping.
Doctor Jones
Doctor Jones 3 yıl önce
The thruster control module was probably the coolest thing I've seen all year.
Lloytre Yıl önce
Less parts means more space, more space means more instruments and whatnot to be boarded on a spacecraft. Also cheaper i guess
MB Yıl önce
@Doctor Jones Yes, but I don't see how that answers my question.
Doctor Jones
Doctor Jones Yıl önce
@MB I mean... obviously having 1 thruster do 2 jobs is going to be more effective than 2 thrusters on 1 job...
Doctor Jones
Doctor Jones Yıl önce
@Comp Nethry Only useful application? Uh... did you even watch the video?
MB Yıl önce
yes, but why does it allow to use one thruster in place of two? ... I mean, can't you build a thruster that rotates around two axes without using that technology? ...
Sir_squonks_alot_ Castro
This guy and his work should be in school books! He is the definition of thinking outside the box.
xaracrocker Yıl önce
I would have loved him as a professor! If I had the opportunity to switch to compliant mechanisms for my speciality, I definitely would.
loop Yıl önce
Amazing video! I love the innovations insanely smart people come up with!!
Truth Holder
Truth Holder 7 aylar önce
BYU is always coming up with new innovations. If I were young and going in to any field of engineering, I'd choose BYU. Now, I want to find out if their School of Engineering has an open house day. That would be a fun field trip for this retired engineer.
Kevin Street
Kevin Street 3 yıl önce
That thruster control for the satellite is a thing of beauty. I'd love to see an animation of how it works!
Trains and Rockets
Trains and Rockets 2 yıl önce
@9oreos Can u help a little? I need 12 more subs.
Da Os
Da Os 3 yıl önce
@Hafidh Zuhdi because human joints are not designed
Da Os
Da Os 3 yıl önce
8:50 - 9:01
Eric Y
Eric Y 3 yıl önce
@Hafidh Zuhdi Natural shoulder/hip joints have to be biologically grown which means building on existing structure A to get to point B or C, or elsewhere. In nature this is mediated by many factors including physical stressors, chemical diffusion, blood supply, senses, etc, etc. The 3D multi-interconnected nature of this compliant structure intuitively seems unlikely to be easy to form by those naturally mediated growth factors. Nature would go with whichever process works given natural constraints. This artificial compliant structure can be formed in many different industrial ways with completely different engineering constraints. This is just my own speculation from an engineering, technical background, with an interest in science & medicine.
Hafidh Zuhdi
Hafidh Zuhdi 3 yıl önce
@Frank hahah. English is not my first langauge
William Federbusch
William Federbusch 9 aylar önce
Love that you and PhysicsGirl are friends! Also super proud of myself when, while watching Harry Potter, I realized what Veritasium means! Love this channel. Keep up the amazing work. I teach STEAM in elementary and my students benefit from my learning from you.
Marnix Meersman
Marnix Meersman Yıl önce
Hi @veritasium I was trying to think of a way to implement the thruster mechanism shown at 8:33 to use it for the mirror pointing of a telescope. An interesting question that I have is how this mechanism is able to operate in space when titanium becomes very brittle at those temperatures.
b_a_ hoonigan
b_a_ hoonigan 5 aylar önce
I feel that there may be some improvised alloys used, cause afaik titanium goes extremely brittle at -196C , and this was just a prototype to see if titanium would be a good fit. Just an assumption tho…
b_a_ hoonigan
b_a_ hoonigan 5 aylar önce
You sometimes feel things like these were already made… I had this in mind years ago how the centrifugal force could be used in a clutch and turns out, it wasn’t really being used until now. The problem with new ideas is, you do not know if they are already being researched upon or not… So simple yet so sophisticated.. its so cool to watch such innovations!
Farzad Misaghi
Farzad Misaghi Yıl önce
Really cool! The metals have an initial elastic deformation, which allows them to revert back to their original shape. As long as the devices printed do not go into plastic deformation, it would work really well for a very long time. So brittle materials like glass and ceramics become extremely difficult to work with in these applications. Thanks for the video.
Jan Samohýl
Jan Samohýl 3 yıl önce
This is mind-bending, but luckily, my mind is flexible and compliant.
Andrea B
Andrea B 5 aylar önce
Good one. Lol
Bill A
Bill A 3 yıl önce
Just make sure you don't bend your mind more than a couple of hundred times, cuz it will wind up as the Samsung "Fold" phone... not good! ;D
Gregory 3 yıl önce
@Yue Yu No, that's not what I meant, also I was joking. :)
DesertDog 3 yıl önce
But he could be a master debator
Gregory 3 yıl önce
@CunningLinguist01 Maybe you're not quite as skilled a "CunningLinguist" as you claim to be. ;)
Celia YAHCCS Yıl önce
More fascinating machines. Even some that just make peculiar sounds but I couldn't see what their function was apart from that. Perhaps this could lead to inventing new kinds of musical instruments or at least different percussion or sound effects !
StayChaotic 11 aylar önce
You, your team, and all the people that you feature are so very talented. thank you for sharing as always brother
Dylan White
Dylan White Yıl önce
That clutch design would be really helpful in nitro RCs.
Anthony Carbone
Anthony Carbone 6 aylar önce
I agree with similar comments that this topic intrigued me like no other. It is almost like modeling an exoskeleton but in a future modernistic manner. This seems like future tech that is so cool that it has come back in time for us mere mortals to marvel over.
Econ Caleb
Econ Caleb 3 yıl önce
Weird flex but okay
Wouldiwas Shookspeared
Sketti Boi
Sketti Boi 2 aylar önce
debug 2 aylar önce
Guy Marshall
Guy Marshall 3 aylar önce
do not look at my desc
yeah…… ᴡᴇɪʀᴅ f̳͉̼͉̙͔͈͕̂̉̇l͕͖͉̭̰ͬ̍ͤ͆̊ͨe̮̟͈̣̖̰̩̹͈̾ͨ̑͑x̥͕̮̠̦͉̑̉̄̀̚
Kadden Woodall
Kadden Woodall Yıl önce
Love seeing advancements in technology and the human mind evolving
Alex Yıl önce
The Thrusters titanium inputs look fairly similar to the same mechanism that controls the joysticks on remote controllers!
René Christensen
I used the mechanism shown at 6 minutes in to make a patent application in my former company. We printed this particular geometry from the video to show off the principle.
Johan Rosenberg
Johan Rosenberg Yıl önce
It looks cool, but I'm not entirely certain about the benefits. For one there's a big difference in replacing a single standardized nut or a whole unique mechanism. Another point would be the strength of those flexible parts under unexpected loads. But I expect the ones in charge of product design to take such factors into account at least to some extent.
m box
m box Yıl önce
As a former student of mechanical engineering I feel like this is the real business. 3D printing is a pretty cool addition to the toolbox but going back and rethinking linkage mechanisms in this way feels way, way more exciting and fruitful to me.
Truth Holder
Truth Holder 7 aylar önce
Agreed. I think of my days at M-K Engineers (decades ago). This would have changed how we designed things.
Laurent Beaulieu
Laurent Beaulieu 9 aylar önce
That is what is brilliant with 3d printing. Gives access to engineering and prototyping to the masses. Never been more easy.
Phillipe Janvier
Phillipe Janvier 9 aylar önce
Everything needs to be looked at again
The Villain in Glasses
Old comment, yes, but still wanted to mention you should check out the origami engineering video Derek did with this same guy, Larry Howell. Basically, they talk about taking compliant engineering to the next level using the power of folding.
cchavezjr7 Yıl önce
What about exact repeatability? With a bearing pivot or the type, you know exactly the range of motion. With a bend, there's variability, even though minute that would make it less than precise.
Fritze 7 aylar önce
the mechanism at 10:44 reminds me of the way a bulova accutron works (analog to a balance spring.).there is a tuning fork which vibrates with 360Hz. this is transformed to a gear with 300 teeth and makes it turn 1,2 times per second as a time base. you can hear the watch humming with that frequency.
watcherofthingsthatRkek Anonëĺmőose
Also known as living hinges or built to fail devices for mass production, however in some situations they are a great solution
Ken Albertsen
Ken Albertsen Aylar önce
I like it. Thanks for showing innovative tech, that precludes anything digital. .... and is low tech, and relatively cheap.
Taikamuna 3 yıl önce
_Any machine is flexible if you're just strong enough_
Demian Yıl önce
Duck. Yıl önce
Freaky Frank
Freaky Frank Yıl önce
Illidan Stormrage
Except my meat when it's hard
Adrian Gamboa
Adrian Gamboa Yıl önce
Dark Lusare
Dark Lusare Yıl önce
This really calls for much respect for this research group and Professor
yoashuain1 5 aylar önce
Very cool and inspiring. Time to get to the CAD and make something amazing.🤖
TimeHunter 3 aylar önce
That clutch design could improve so many designs. One part that can be swapped instead of annoying mechanisms would save time and money!
Aeldrynn Yıl önce
I had a complain mechanism class last year during my Bachelor in Microtechnic at EPFL, and I loved it!
Piesho Nais
Piesho Nais Yıl önce
11:27 "So are these now being used on nuclear weapons?" "You know, it turns out they don't tell us" Now I know how to take my resume to the next level.
Heaven 42#
Heaven 42# 8 aylar önce
Help Boycott fluoride Today , save a life Tomorrow.
Heaven 42#
Heaven 42# 8 aylar önce
Hermi 1-kenobi
Hermi 1-kenobi 9 aylar önce
@unums still don’t get it.
unums 9 aylar önce
That’s because you don’t have an _actual_ resume @Hermi 1-kenobi
Hermi 1-kenobi
Hermi 1-kenobi 9 aylar önce
i dont get it TvT
C.H. Yıl önce
My professor made a lot of components for electrical devices... feeling lucky to be learning with him! Mechanics of Materials
Robert Ginsburg
Robert Ginsburg 4 aylar önce
Absolutely love it. The medical applications will be tremendous.
Peter Bourdelle
Peter Bourdelle 4 aylar önce
Centrifugal Clutch on my old go cart (driven wheel) had a cylindrical aluminum housing. Driving through the woods one day, caught a branch in the chain sprocket. I surmised turning the wheel in reverse could free it, but more leverage if I could spin the clutch body & sprocket to release the branch. My bare thumb & fore-finger slid off the clutch housing with a sizzle, so fast that it didn’t hurt, but the white char endured for a while (no scar remained), but lesson learned.
M A 9 aylar önce
This is a really cool concept however this would only work on plastics and composites as metals would just work-harden and break so it's a bit limited for now however if you got some new fangled carbon composite materials you could make some complex shizz like and engine would be cool
ThatMCGamer 3 yıl önce
That man was such good sport. Very open with how it works. I personally thank him for being on this episode
Rumi Khuwaja
Rumi Khuwaja 3 yıl önce
I'm sure he'll appreciate it
Slaughter Gang
Slaughter Gang 3 yıl önce
im guessing you say that because you're surprised and most people on STEM fields tend to be very grumpy and serious right?? Even on science and engineering subreddits kids are so annoying
Trevor Lindgren
Trevor Lindgren 3 yıl önce
He is a friend of mine and a good man. Great episode!
Sou Sou
Sou Sou 3 yıl önce
@Swapnil Sinha اة
Julious G
Julious G 3 yıl önce
ThatMCGamer yeah, this was a great video. After you're done watching you might also enjoy this btw trvid.com/video/video-LA9ge1KQWqo.html
ZTenski 11 aylar önce
This might be the future when it comes to high tech or miniature applications, but consumer products that bend are not made out of titanium or exotic materials that can take the repeated stress, they're made out of the cheapest crap plastic available. I can't even buy bending clip for my bags of chips that will last more than a year, let alone things that matter. For the consumer market, the singular reason this exists is because it's cheaper to manufacture. Also, every chainsaw I've ever seen that has an expanding clutch of this type is a huge lemon when you put any load on it, in my experience.
this has civil engineering applications here at home we can use the bending methodology for anti earthquake roads and bridges
niklar55 3 aylar önce
😊👍 Designs after my own heart feelings. I suppose one of the earliest examples of a simple compliant device that I was introduced to, was at college, in the 70's. It was an example of a real problem solved. An aircraft had a self starter, but the shaft was inclined to shear, due to the inertia of the large engine, and the necessary rather ferocious torque of the starter motor. So the shaft was made bigger, and it still broke! So it was made bigger still, but it still broke! Then another engineer got involved, and instead of making it bigger, he made it smaller, so it acted like a spring torsion bar. It stopped breaking! I solved a problem with a ''fruit machine,'' also known as a ''one armed bandit!'' The reel stops were controlled by a lever operated by a solenoid. In order for the lever to release, it had to be spring loaded. This required pins, and springs, to produce a two way sliding mechanism. From memory, I think sixteen pieces total. I replaced it with THREE, by using a piece of flexible 'memory foam,' which also provided damping.😊 .
dhaen Yıl önce
Great video as usual! But not sure the definition of backlash is correct. Backlash is a recoil, the effect shown was more like a deadband.
grovermatic 3 yıl önce
Please, just pause for a moment and reflect on the fact that the phrase "3D-printed titanium" is, in fact, an ACTUAL THING. That is freakin' awesome... what a time to be alive!
don cahooti
don cahooti 2 yıl önce
Uhhh Whatdoiputhere - you got that right . That’s why I didn’t have kids . Too many people. You can have fun if you get away from it all - - even if only in your head.. good luck .
SirCheeseTheThird 2 yıl önce
it is not a fun time to be alive
grovermatic 2 yıl önce
@don cahooti I didn't, but I should have. You're 100% right. It costs me $0 to go out in my Bob Ross shirt and make people smile.
don cahooti
don cahooti 2 yıl önce
grovermatic - you mean go out and do it
Kosta Hantov
Kosta Hantov 2 yıl önce
That dude was super chill about it tho.
Martin Wright
Martin Wright 2 gün önce
In the military we use a lot of carbiners [sic] and S clips and about 2007 they changed from using springs to bendy part to be a piece of steel with offset connection to the solid bit.
Aaron• Highcloud
Aaron• Highcloud 6 aylar önce
7:53 What’s freakin me out is that you can even print titanium like that lol…the endless possibilities for that just boggles my mind
Eric Lewis
Eric Lewis Yıl önce
Eye-opening, fun, clever as hell and incredibly important.
The clutch is actually a centrifugal clutch, exactly like the ones in the chainsaw, but the one in chainsaw have 2 or 3 springs, and those springs break all the time. So these parts would be much more efficient since they’re made out of one piece. Nice!
Ryan Romero
Ryan Romero 3 yıl önce
Dr. Howell is an amazing Professor and a great guy. I was lucky enough to take his compliant mechanisms class. I'd highly recommend reading his book and learning about how to design compliant mechanisms using pseudo-rigid-body models. That's when your mind will really be blown! To think that we can take complex mechanical systems and make them compliant using a simple formula is what is really quite amazing. Great video!
MrDrProfBada55 3 yıl önce
F.A.C.T. is where it's at
Barbara Houk
Barbara Houk 3 yıl önce
@Ryan I spent years in schooling and most of that time, I was self taught and extremely inventive getting around the stupidity of so-called teachers. However, a rare handful in my 28 yrs of formal education I met educators such as this man. They were inspiring and could clearly explain their subject(s). I am truly happy for you that you too have had the pleasure of experiencing learning from someone who enjoys investigating, discovering, inventing, creating and learning and then sharing all of this with others.
Carlosmp20 3 yıl önce
@犬走椛 lol
犬走椛 3 yıl önce
Complaint mechanisms sounds more like a government employee training program (yes I know it was a typo, but this is the internet, one does not simply walk by an interesting typo).
BU BU Yıl önce
Based on the physical properties of the material, such mechanical devices are more suitable for micro-machines
3:03 average grip strength is 105-113 lbs, 30-1 ratio would mean you can output 3150-3390 lbs of force
Matjaz Walland
Matjaz Walland 7 aylar önce
super great usage options for low price. The problem arises when repairing and replacing, where the existing element of such a device cannot be used, even with the repair there would be a difference in performance. And different materials have different temperature properties.
Cpt.potato Yıl önce
"About a month ago I was giving a talk in Utah, hence the suit." First thing learned, you need a suit in Utah
SpanishAbbey 2 aylar önce
@Jesus has given you all. Repent or die. no u 😎
elkellenhabla 9 aylar önce
@JL Glover just the Salt Lake airport on my way to Idaho which has a lot of Mormons. Are you LDS?
JL Glover
JL Glover 9 aylar önce
@elkellenhabla have you ever been to Utah?
elkellenhabla 9 aylar önce
@JL Glover you a member of that church?
Jesus has given you all. Repent or die.
Repent to Jesus Christ!! ““I am sending you out like sheep among wolves. Therefore be as shrewd as snakes and as innocent as doves.” ‭‭Matthew‬ ‭10:16‬ ‭NIV‬‬
dayvie NK
dayvie NK 3 yıl önce
That prof looks so humble. All engineering profs should be this cool.
Daniel Shelley
Daniel Shelley 2 yıl önce
One of my favorite professors and one of my favorite classes!
Chris Hayes
Chris Hayes 2 yıl önce
Welcome to BYU :)
N Jones
N Jones 2 yıl önce
@Happy go Lucky any religion = wrong!
skeptic moderate
skeptic moderate 2 yıl önce
Yeah. My profs are dicks.
Paavo Bergmann
Paavo Bergmann 3 yıl önce
Sgt. Kong
Sgt. Kong Yıl önce
I truly appreciate your channel an immense amount.
zJoriz Yıl önce
I've seen plastic mesh tires that seem to benefit from this principle. Next step, of course, would be similar suspenison... If you can control to such a degree what movements are allowed, this could save a lot of weight.
masoud masoud
masoud masoud 4 aylar önce
I learned a lot from the video, however we are missing a key issue. what are the disadvantages of this mechanisms over traditional. I mean there should exist a disadvantage.
Sam 3 aylar önce
I don't know a lot about this stuff, but wouldn't flexible parts break faster? You're constantly bending it but when you use solid parts, none of the material is breaking, just the hinges.
electronicsNmore 3 yıl önce
It's hard to believe that thin plastic can hold up that long.....1M cycles?
Ashfaq Alve
Ashfaq Alve 4 aylar önce
@Grey Duck NICE ONE !!
Alleria 4 aylar önce
@nagualdesign Oh.
nagualdesign 4 aylar önce
@Alleria I honestly don't remember typing that comment 3 years ago but I can assure you that it's utter nonsense. Why would anyone buy a fresh box of Tic Tacs and decant them into a used box?! 😆 Re-reading the thread, the person I originally replied to gave a very silly example, since a Tic Tac lid will generally be opened and closed less than 40 times before being thrown away. Hopefully he was being sarcastic rather than stupid. I did, however, spell Tic Tac both correctly and icnorecttly. Probably automiscorrected.
Alleria 4 aylar önce
@nagualdesign 40 Years and still spell Tic Tac wrong.
Dave Wright
Dave Wright 11 aylar önce
It’s just important that you design the part to never go past its elastic deformation stage. If you tried to do this into a plastic deformation stage, it would be a different story. That titanium part that looked like a snowflake was a little suspicious to me, but I suppose it may only require a certain number of cycles before replacing. Sometimes design restrictions and parameters win over longevity. Otherwise, a Honda Civic would weigh 20,000lbs and cost $300,000.
FoamFPSGuy 6 aylar önce
That 3d printed gripper is amazing, I have a 3d printer so I might be able to make one.
Ahmad Chuzgapa
Ahmad Chuzgapa 4 aylar önce
The only thing I'm concerned with is the breakage due to fatigue in the 'bendy' zones. If that is not a problem then I'm sold on the idea.
The Odd Plebs
The Odd Plebs 11 aylar önce
i would want a more detail of this. this seems quite interesting
DonTruman 10 aylar önce
Really interesting subject, and the professor is impressive. Are there no down-sides to it? Engineering is the "art of compromise" so, what are the weaknesses of the tech, vs rigid mechanics? And to be honest, I felt the commentary by the host of the show detracted from it. Who cares how "cool" or emotionally satisfying it is to operate it? Fidget gadget, really?
YAMADA 3 yıl önce
Those fatigue tests are so cool, but I always wonder what the margin for error is, since actual use a lot different from the conditions in a fatigue test in terms of intervals between uses and heat/friction accumulation
BPollard86 3 yıl önce
Next time on Underwriters Laboratory... We see if this toaster can cook pepperoni while hanging from a light socket without catching fire!
Josh Foley
Josh Foley 3 yıl önce
Fatigue testing in the real world would be harsher. I imagine the materials to be at cooler temperatures when activated versus in the controlled environment where the material is warm from the repeated cycles. Thoughts?
Soumya Khanna
Soumya Khanna 3 yıl önce
@TonyOneBlairoby Fatigue testing results in a value known as Endurance strength. Actual Fatigue strength is calculated by multiplying that value by various factors that depend upon temperature, surface conditions, reliability etc. which account for the usage conditions of the designed object. Search about "Marin's equation" used to design shafts and axles.
Xtra Moist
Xtra Moist 3 yıl önce
I think the irony here is that they'd need a compliant mechanism to get the most accurate test of a compliant mechanism.... Also I'm super giddy about the potential implications of a compliant mechanism made of graphene incorporated into electronics. Like, "compliant mechanism circuitry". But I think I'm getting ahead of myself. Wow! What a great time to be alive!
Lochadyloo 3 yıl önce
i was wondering the same thing
Martijn S.
Martijn S. 3 aylar önce
Wouldn't metal fatigue be an issue in those types of tools? I imagine it wouldn't be ideal if your nuclear safety lock just snapped off at some point.
mjbailey404 Yıl önce
Smaller part count is potentially useful for manufacturing but for longevity it would mean having to replace the entire thing after any operational failure
Bafftubz10 11 aylar önce
I legit used to think of this concept and was wondering if there was an actual term for it and now I've come across this video.
MKP Yıl önce
Well technically every mechanism have compliancy/flexing, these just take advantage of it
Brian Muhia
Brian Muhia 3 yıl önce
I am stunned by this level of mechanical and dynamical precision.
parapobabam 3 yıl önce
@Fran Soto great. don't do that again with adults in the room.
Fran Soto
Fran Soto 3 yıl önce
Person: *says something relevant and appropriate to the subject of the video that does not over exaggerate, doesn't try to make himself look smart, and is not calling anyone dumber for not understanding, simply marveling at this awesome technology" Dementra: R\iAmStuUpiD
Mr3344555 3 yıl önce
@Demetra Economou don't be one of those cuckolds dude. Try to talk without memes or reddit.
Brian Muhia
Brian Muhia 3 yıl önce
@A en.wikipedia.org/wiki/Dynamical_system
Demetra Economou
Demetra Economou 3 yıl önce
Brian Muhia R/iamverysmart
That type of clutch already exists in small scooter motorcycles. New thing would be the compliant mechanism instead of the springs that regular centrifugal clutches have.
Max Mustermann
Max Mustermann 3 aylar önce
@ 2:17 That vice-grip is a bad idea because of work hardening. You could make the flexing part out of POM (polyoxymethylene) but it would still break some day.
Kyle A
Kyle A Yıl önce
I love watching this video years apart bc I'm learning more and more about physic in this time
Jackass Chicken
Jackass Chicken Yıl önce
I'm going to stick with my steel vice grips. Paying $1000 for ones made out of titanium is a distinct, and quite major, disadvantage.
Agert64 Yıl önce
Just a transmissions valve body applies pressure to incoming fluid forces, by redirecting it through chambers. Redirecting pressures across the y-axis allows micro adjustments for the forward motion
Ecclesia 2 aylar önce
Imagine letting AI experiment on compliant mechanisms and the infinite possibilities we have not thought of yet. Once we let AI run our world (this will happen in a matter of 50-100 years btw), it will accelerate humanity to levels beyond our imagination.
Paul Palmer
Paul Palmer 19 gün önce
In 1968 I did research to try to put a machine, a molecular beam, on a glass slide, that could then be rotated to get three way velocity specification. The microchip etching needed had not yet been invented (I tried to use asphalt and HF). But there were mechanical components too. These kind of etchable devices could serve for controls. So far as I know, the device has never been made or researched. Maybe it's time to try again using these advanced mechanisms.
MattyBearXo 4 aylar önce
My wife asked what I was watching at 3am, I showed her the thruster and said "why machines that bend are actually better than the non bending counterparts." She whispered back "those non bending fools" and went right back to sleep. I've officially made it as an adult.
ACB IXI Yıl önce
"you would scream in pain " *puts his finger and then scream * they don't call him a scientist for nothing bud
F N 4 aylar önce
My man needed to prove the hypothesis
Jesus has given you all. Repent or die.
Repent to Jesus Christ!! ““I am sending you out like sheep among wolves. Therefore be as shrewd as snakes and as innocent as doves.” ‭‭Matthew‬ ‭10:16‬ ‭NIV‬‬
nittyjee 11 aylar önce
Charlie bit me. OW CHARLIE OWWWWW
ACB IXI 11 aylar önce
@keli5 they were joking as well lmfao no need to get mad
Imaad Chougle
Imaad Chougle 11 aylar önce
Coolkatjc 4 aylar önce
Wish i could show this picture to folks from the early 1800s to see how life would evolve away from a digital system to an analog complient system
Flamenco Flamenco
Flamenco Flamenco 9 aylar önce
Imagine a car suspension made based on this brilliant research 🧐
Lars Thomsen
Lars Thomsen Yıl önce
Im simply baffled - it is elegant, simple and beautiful in function and design and with extreme performance.
oV Linx
oV Linx 9 aylar önce
I havent watched a video I enjoyed this much in a while thank you for this content!
Khason01 3 yıl önce
8 P's 1.) Part Count (Less) 2:42 2.) Production Processes (Various) 3:28 3.) Price (Inexpensive) 3:33 4.) Precise Motion (no backlash) 5:21 5.) Performance (no backlash) 5:38 6.) Proportions (smaller) 7:18 7.) Portable (lightweight, space application) 7:33 8.) Predictability (safing & arming WMDs) 10:17 in case you missed them :)
Pixel121 3 yıl önce
too many pp for me
999is666upsidedown 3 yıl önce
Marquiz Milton
Marquiz Milton 3 yıl önce
@Moderately Amused if my vice grip breaks, I take it to the blacksmith and he will repair it for me.
Eric V
Eric V 3 yıl önce
I wish he included more examples for the uses of these different devices.
Sudeep Singh
Sudeep Singh 3 yıl önce
4:55 9th P, physics Girl
MarkToast Yıl önce
I love this, they seem like they could be genuine friends
John Kozlowski
John Kozlowski Yıl önce
Wow! Here's an application you may not have considered. Is it worth thinking about how you can create bracing for the top of a stringed acoustic instrument, like a guitar? Many major manufacturers brag about their special wood bracing that was proven over centuries. All make some compromise between sound quality and strength.
BuckMarley 7 aylar önce
Really question the durability of the flexible parts. After how many repetitions will it take until it snaps
Steve Poper
Steve Poper Yıl önce
2 years ago: Why machines that bend are better Now: Why robots that bend are better 2 years from now: Why humans that bend are better
The Lead Pill
The Lead Pill 3 yıl önce
A video about 3D printable nanomachines is, somehow, focused on nuclear weapons and sponsored by home security. It's both exciting and very terrifying.
Arterexius 3 yıl önce
@Anon YMouse moving parts on a silicon chip.
CAD CNC Engineering & Fabrication LLC
@brindlebriar Viagra makes me less compliant.
brindlebriar 3 yıl önce
Humans are compliant mechanisms too.
The Unstoppable Warrior
Gotta be in board this comment chain I can sense the sharks coming smelling political blood
100Mph Pixels
100Mph Pixels 3 yıl önce
@Flying Skyward no home = no worries 🤣
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