COMPLIANT MECHANISMS COMPILATION - make the World flexible

[@stephanberger7455]

Friction isn‘t gone, it‘s now inside the material: The force you need to bend the material

[@maot1985]

You are so right, and beside, the bending also generates heat :-)

[@MaxBrainDevices]

You are both right my English is not perfect. There is force involved bending the material Maybe is better to say is there is no friction caused by rubbing 2 pieces together?

[@stephanberger7455]

@@MaxBrainDevices : My English is also not perfect, I am not a native speaker. Yes, there is not friction caused by rubbing two parts against each other. But, depending on the material used, the inner friction / bending forces are normally lower than the „rubbing“ friction because the thickness of the material in the bending area(s) is very small so that bending can take place. But the best in your design is the fact that it can be printed in one piece! That‘s why manufacturers of plastic boxes use this to simplify the hinges between box and lid. Using nylon (like e.g. Tupperware does) enhances the lifetime of this kind of hinges, but it‘s still limited (perfect for selling new boxes ;-) ). If you need high reliability and costs are not so important, you can use small ball bearings instead of standard hinges. But again, great design idea of yours.

[@erevos217]

@@MaxBrainDevices i think you meant external wear. interesting design though. cheers.👍

[@MaxBrainDevices]

@@erevos217 thank you but sorry for my English what you mean with external wear?

[@ufinc]

Thank you, youtube algorithm, for recommending this!

[@MaxBrainDevices]

Looks like the new KZbin algorithm works better

[@MaxBrainDevices]

This is a Compliant Mechanism compilation, do you already know what a compliant mechanism is? It’s a type of flexible mechanism that uses the elasticity of materials for movement instead of the joints of classic mechanisms.They have advantages over normal mechanisms, in particular the cost being made of a single piece and no type of clutch and therefore no lubrication required. for a maker to use this type of mechanism is like opening up a whole new world of possibilities! Would you like to know more about these mechanisms?

[@juandavidaguilartorres3788]

Yes I would like to know more, mostly about their desing.

[@MaxBrainDevices]

@@juandavidaguilartorres3788 I think of made a second video explains more and maybe share the cad files. What you like to know about the design how I make it? Which program I use?

[@juandavidaguilartorres3788]

@@MaxBrainDevices Hi, yes the CAD files would be great. Also if is not too much to ask I would like to know maybe which paremeters or characteristics are important to know to make the mecanisms, for example, if the mecanisms needs to do a circular or linear motion, what would be it's correct geometry or array? Perhaps that is too complex and is better or easier to explain different types of compliant mecanisms acording to it's applications. Thank you for answering and for the video, it was fantastic! I hope more people learn about this and start to consider these kind of approaches to more new desings in technology and engineering.

[@vasugupta5499]

It's a awesome

[@MaxBrainDevices]

Thank you

[@WalterMahar]

Thanks for the Thingiverse connect!

[@yagamilight2465]

Wow! This is so cool, I didn't know about this type of mechanisms, so it was informative for me. Thanks!

[@MaxBrainDevices]

Thank you I also find it very interesting and I'm trying to deepen the subject

[@Sekir80]

kzbin.info/www/bejne/b2jXaIuglM51rJI&ab_channel=Veritasium

[@MaxBrainDevices]

@@Sekir80 for everyone reading this is a great video explanetion about the subject ☝️

[@Ixions]

No assembly is the most fascinating part for me. An extrusion die and cutting operation makes manufacturing insanely scalable.

[@MaxBrainDevices]

Yea it’s absolutely one of the key thing about it! I also find the scalability at a microscopic level fantastic

[@drewclayborn]

Hi, I have a trachea and am on a ventilator and I’m trying to make a compliant mechanism to hold the ventilator on the trach. Your bistable clamp is very close to being what I’m looking for. Right now I use a shoe string. I’ve had Velcro straps in the past that were discontinued. I want to create a compliant mechanism so that I can 3D print it myself and share it with other people

[@Lu-db1uf]

Good to see tensigrity being rediscovered

[@sebastianhilscher8072]

What material where these parts printed from? Would lack of ductility in PLA be an issue for the thin bending elements?

[@MaxBrainDevices]

This are printed in PLA because they are just examples. It depends on the mechanism in some it creates problems in others it does not. let's say that the PLA is useful to quickly understand where the mechanism feel more stress. I've never tried it but there are also ways to use composite materials in order to have more flexible parts and more rigid ones. should it be topographic optimization?

[@sayethwe8683]

In the first slide you make reference to elastic body deformation. does this mean the material is only undergoing elastic strain, or is some plastic deformation allowed? how do these parts fare in fatigue compared to other options?

[@MaxBrainDevices]

these are just tests done in PLA so what you see is i think mainly plastic deformation but by using composite materials, the joints could be made more elastic and the solid parts more rigid, prolonging their use and improving performance. Are you wonder how long they can last?

[@MacStrange]

Molto interessante! L’ultimo a tre stadi è spettacolare.

[@MaxBrainDevices]

Grande Mac grazie! Anche io lo trovo un argomento molto interessante sto cercando di approfondirlo

[@Automatic-Diaphragm]

@@MaxBrainDevices ma li hai creato tu? L'ultimo atrezzo che stringe e' top :D

[@MaxBrainDevices]

@@Automatic-Diaphragm alcuni sono meccanismi che si conoscono già è molti sono miei e quello in particolare che dici tu si l’ho creato io

[@simofaidate]

Fighissimo sto affare!! Ti apre un mondo di possibilità....io ci vedo tante catapulte

[@MaxBrainDevices]

Assolutamente vero Simo un sacco di possibilità! Grande mi piacerebbe vedere una catapulta fatta così

[@WidthSound-Music]

So good liked thx a lot 🙏

[@MaxBrainDevices]

Width.Sound Music thanks and nice music! is everything ok with the description I made?

[@WidthSound-Music]

@@MaxBrainDevices Yes it's very good ;)

[@ColinRichardson]

Any metrics on the repeatability of bend/folds?

[@MaxBrainDevices]

It totally depends on the material, Pla is for sure not the best one but I use it because this is just an example

[@Mixter81]

A question... what happens if the material is made of thin flexible stainless steel? Is such a thing possible?

[@MaxBrainDevices]

It’s totally possible probably with some adjustments because of the material

[@MechMX]

I wonder what these would look like if a magnet controlled the motion of the joint, great video!

[@MaxBrainDevices]

That’s a good question! What you thing about electromagnet? Maybe that way it can be used like an actuator

[@MechMX]

Yeah that’s a great idea! An electromagnet would work great for the smaller designs. That would be a really simple circuit for a hand-held claw.

[@lily_astral]

The wildest thing about these mechanisms is how effortlessly (compared to rigid structures) you can make them at the nano scale.

[@MaxBrainDevices]

You totally right

[@calebchu4098]

Hi, is there any CAD drawings for the Bistable Joint, i would like to look into it for a research?

[@MaxBrainDevices]

yes on my thingiverse there is a link in the description

[@paulocesardeoliveira2763]

Obrigado pelo Show!

[@mohitpalIITD]

can i get the designing tutorial video link of this complaint gripper>>

[@MaxBrainDevices]

You can find the gripper on my thingiverse

[@Zanbur3D]

Can you explain how to drain something like this

[@MaxBrainDevices]

i have a relly messi way of doing it all by hand

[@planktonfun1]

what type of filament you use? is it still usable with a brittle filament?

[@MaxBrainDevices]

I use PLA for this bit just because it’s for demonstration if you use TPU you can make a good quality mechanism for sure

[@karthick86c]

Good job! Good choice of designs to demonstrate compliant mechanisms, but you might want to update the explanation in your description "and no type of clutch and" to "revolute joint (hinge) are replaced by flexures". Those bending thin portions of the mechanisms are called flexures and not clutches. These flexures replace revolute joints in compliant mechanisms. Perhaps you meant something else! and I misunderstood! but clutch normally refers to a mechanical device typically used to engage and disengage an actuator to a load. So clutch in your description is kind of misleading. My two cents.

[@GrueblersCount]

What is lacking with Mechanical Engineers today, is the knowledge of how to design mechanisms correctly. Did know that there's a mathematical formula that can be used for all mechanism designs? It's called Gruebler's Count. I found a way to make it practical for all 3D mechanisms. Here's the link if you are interested. kzbin.info/www/bejne/gXelaZqDn913hs0

[@OWNEDGAMINGwasd]

How come you didnt post any of these on ThingVerse or grabCAD ???

[@OWNEDGAMINGwasd]

i have been looking for these files for a while now

[@MaxBrainDevices]

I just started posting them on thingiverse you can find the link here in the comments

[@MaxBrainDevices]

www.thingiverse.com/maxbraindevices/designs

[@SniperZaku]

Wouldn't the thin bendable sections fail eventually?

[@MaxBrainDevices]

Yes probably it really depends on the material you build it. But there is a lot of aplication on disposable things or other

[@neoprint3d]

You got any files you are willing go share I find compliant mechanisms to be super fascinating

[@MaxBrainDevices]

I would like but I never did it. Where is the best place to share the files?

[@TheSakzzz]

What material are they printed with ? PLA or ABS?

[@MaxBrainDevices]

Everything in the video is printed with PLA but you can make it better probably with ABS

[@TheSakzzz]

@@MaxBrainDevices PLA would probably take a set after prolong use. I am looking to design a leaf spring in PLA , so your video was a good indication of the possibilities.

[@MaxBrainDevices]

@@TheSakzzz I'm glad to help. You can write me on instagram @braindevices if you need more info

[@Xlaxsauce]

how many cycles to failure?

[@BloodyMobile]

That's what I was wondering too. While the lack of joints as in axles cuts out the friction wear, there has to be some kind of wear on the bending parts, right? Or are there 3D print plastics that can have an overstress-free deformation range, like metal springs for example?

[@MaxBrainDevices]

it is a somewhat vague question. It really depends on the type of mechanism and above all on the material used. These are in PLA because they are just examples. But with better plastics they can last for years. Toys industry has been using joints like this for a long time now

[@MaxBrainDevices]

@@BloodyMobile it is a question I made myself too. But using the right kind of plastic they can last a long time

[@Iamwolf134]

A compliant mechanism for a door handle is one application that could work well in the automotive sector.

[@MaxBrainDevices]

Its actually a good idea thank you for suggesting it. the best thing for me is to start from a normal mechanism and make it a compliant version. Do you know what i could look at as an example?

[@Iamwolf134]

@@MaxBrainDevices Any generic car door handle would do.

[@MaxBrainDevices]

@@Iamwolf134 I’ll take a look

[@deucedeuce1572]

I don't understand the "compliant" part of the title. What makes them "compliant"?

[@MaxBrainDevices]

its not a name I made up its how people call this kind of one piece mechanism

[@Stephanie-si8rs]

From the book of things you’ve known intuitively and played with since a kid, but they want you to think you didn’t, so they can file the patent. ‘fades back’

[@MaxBrainDevices]

you are right! and actually toys are full of this kind of mechanism because they are a lot cheaper to manifacture! also all my files are available for free on thingiverse you can find the link in the desciption

[@flaviovianna4889]

Hi Max! How can I contact you directly?

[@MaxBrainDevices]

In Instagram at braindevices

[@MaxBrainDevices]

MY THINGIVERSE PROFILE www.thingiverse.com/maxbraindevices/designs

[@martinaciciulla7837]

🥳🥳🥳🥳

[@MaxBrainDevices]

❤️

[@meettrout419]

Where can I find the part file for the bistable compliant claw at the beginning and 1:16?

[@MaxBrainDevices]

You're right they've already asked me. I will soon make a thingiverse profile to share them

[@MaxBrainDevices]

@Jorge Vega i think the best could be the TPU but i have never tried it because it takes a closed printer or at least a very ventilated place. But maybe someone else here can help us on the best material

[@MaxBrainDevices]

@Jorge Vega I actually use PLA for that but it’s not the right material because it lacks elasticity

[@MaxBrainDevices]

@Jorge Vega you have to try it! I just made a thingiverse profile there is one of my design you can try with it

[@jsholt123]

couldn't this principle work for a prosthetic ankle

[@MaxBrainDevices]

Which one exactly?

[@danielross3306]

Where can i get the download for the bistable joint?

[@MaxBrainDevices]

You can find some on thingiverse but a lot of design in the video are mine and I never post the files maybe you guys like it too?

[@BrainSlugs83]

@@MaxBrainDevices yes, please share the files up on Thangs.

[@meettrout419]

@@MaxBrainDevices please share

[@chaosordeal294]

OK, it's not quite Planet of the Apes, but, solid ending.

[@MaxBrainDevices]

@@chaosordeal294 ahhahaha best comment ever

[@BrainSlugs83]

Where are the STLs though?

[@MaxBrainDevices]

Talking about the Cad files?

[@jeffnarum1373]

Ever since middle school math I've always wondered what a Widget was.

[@MaxBrainDevices]

you re welcome

[@t_c5266]

"friction is absent" internal friction feels cheated

[@joshuavanwinkle3192]

There is internal friction

[@MaxBrainDevices]

yes there is

[@alexkuhn5078]

i like one piece

[@MaxBrainDevices]

Me too

[@machinesandthings9641]

Reminds me of a Venus flytrap

[@MaxBrainDevices]

This is cool I love the Venus plant

[@Ijumpandfly]

Someone ate one letter😇 Pause at 0:05 and you see it says COMLIANT :(

[@MaxBrainDevices]

You are right, but I don’t think I can change it now

[@Ijumpandfly]

@@MaxBrainDevices no worries mucker, have a nice evening :)

[@DanWaller]

first words of the video: COMLIANT MECHANISMS you need a pee...

[@MaxBrainDevices]

True but I can’t change it now

[@finncallahan8994]

Mechanism

[@MaxBrainDevices]

?

[@rextransformation7418]

I wonder what happens when 3D printing fuses with this: kzbin.info/www/bejne/ZpWXl2ucet6mnJo Here's how it works: kzbin.info/www/bejne/aYDNmaKMqqaEobM

[@MaxBrainDevices]

I make one of this top some times ago there is a video here

[@NocturnalRS]

Anyone remember in middle school making those popper things with your agenda?

[@MaxBrainDevices]

Sure and that’s a good example. You can use it as mechanism

[@taylorwrightwright442]

Is there a download for the bustable joint at 0:17