Why Machines That Bend Are Better

  • Published: 12 March 2019
  • 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

Comments • 4 279

  • erik61801
    erik61801  20 less than a minute back

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

    • George Washington
      George Washington  20 minutes back

      he had my attention when he mentioned my home state

      • Genroy Noisis
        Genroy Noisis  23 minutes back

        7:50 is just so unreal.

        • YK D
          YK D  36 minutes back

          Hhhhh Bunch of Stupids

          • Rex Holes
            Rex Holes  40 minutes back

            Airplanes bend

            • xenochaosxc
              xenochaosxc  45 minutes back

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

              • ly Ari
                ly Ari  56 minutes back

                so iPad Pro 2 are better iPad ?

                • TheFalconJetDriver
                  TheFalconJetDriver  58 minutes back

                  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.

                  • Justin Boy
                    Justin Boy  1 hours back

                    Research Flat Earth

                    • draunt7
                      draunt7  2 hours back

                      Mechanically compliant engines?

                      • flash flood99
                        flash flood99  2 hours back

                        What about Scissors?

                        • forrest225
                          forrest225  2 hours back

                          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.


                          It was still a great presentation, honestly it was one of the most well presented that year.

                          Live and learn :)

                          • MoneyAndPeople
                            MoneyAndPeople  2 hours back

                            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!

                            • Vasilis Papanikolaou
                              Vasilis Papanikolaou  2 hours back

                              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.

                              • david chappel
                                david chappel  2 hours back

                                I too can build useless things, like my kids

                                • Rosen Petkov
                                  Rosen Petkov  2 hours back

                                  This is amazing.

                                  • Cole Helterbrand
                                    Cole Helterbrand  2 hours back

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

                                    • Nanqette Pierre
                                      Nanqette Pierre  2 hours back

                                      Would you be apply these concept with composite metals?

                                      • T Lee
                                        T Lee  3 hours back

                                        I wonder how much if any byu got paid

                                        • Prasanth Selvadurai
                                          Prasanth Selvadurai  3 hours back

                                          iPhone 6 has joined the chat

                                          • you2tooyou2too
                                            you2tooyou2too  3 hours back

                                            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.

                                            • josh ziesmer
                                              josh ziesmer  3 hours back

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

                                              • YDP
                                                YDP  3 hours back

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

                                                • Ahmad Faris
                                                  Ahmad Faris  3 hours back

                                                  Finally youtube recommend me real knowledge

                                                  • FancyHat
                                                    FancyHat  3 hours back

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

                                                    • unionse7en
                                                      unionse7en  3 hours back

                                                      You like FLEXURES? do ya? here Dan's channel is VERY educational) : https://www.youtube.com/watch?v=PaypcVFPs48

                                                      • Re Sinka
                                                        Re Sinka  4 hours back

                                                        4:48 is this how chicken head work ?

                                                        • Russ Storm
                                                          Russ Storm  4 hours back

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

                                                          • IS THIS LOSS?
                                                            IS THIS LOSS?  4 hours back

                                                            Plundering poluttion per plastic part produced

                                                            • TurboHawkV6
                                                              TurboHawkV6  4 hours back

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

                                                              • Ghost Reportin'
                                                                Ghost Reportin'  4 hours back

                                                                Pretty girls at BYU

                                                                • Raphaelus13
                                                                  Raphaelus13  4 hours back

                                                                  Great video.

                                                                  • Matts Utube
                                                                    Matts Utube  4 hours back

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

                                                                  • Johnny S.
                                                                    Johnny S.  4 hours back

                                                                    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.

                                                                    • Robin Lefebvre
                                                                      Robin Lefebvre  4 hours back

                                                                      bending steel ... welp hope in humanity restored.

                                                                      • bigTHOR77
                                                                        bigTHOR77  4 hours back

                                                                        That is awesome

                                                                        • Andy Parrish
                                                                          Andy Parrish  4 hours back

                                                                          Bender Bending Rodriguez approves of this.

                                                                          • diogenesofSinope87
                                                                            diogenesofSinope87  4 hours back

                                                                            Great episode, you can 3D print titanium?

                                                                            • gabb05
                                                                              gabb05  5 hours back

                                                                              i bet that guy could make a masterpiece complication watch

                                                                              • Dan Marcoux
                                                                                Dan Marcoux  5 hours back


                                                                                • Zebus Aqua
                                                                                  Zebus Aqua  5 hours back

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

                                                                                  • International Mutual Neutralist Party Templates

                                                                                    Perhaps some counter arguments ???

                                                                                    • emperorSbraz
                                                                                      emperorSbraz  5 hours back

                                                                                      Bender be like hold my beer...

                                                                                      • Paul Fuoco-Binette
                                                                                        Paul Fuoco-Binette  5 hours back

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

                                                                                        • 5Lvideo
                                                                                          5Lvideo  5 hours back

                                                                                          <3 you 42

                                                                                          • Weston Covey
                                                                                            Weston Covey  5 hours back

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

                                                                                            • dreska
                                                                                              dreska  5 hours back

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

                                                                                              • MSPaintBurger
                                                                                                MSPaintBurger  5 hours back

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