Why Machines That Bend Are Better

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  • 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:
    compliantmechanisms.byu.edu

    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 • 5 892

  • Chris Heerschap
    Chris Heerschap  8 hours back

    I was reminded of this video when I came across this seriously cool 3D printed hand - one piece and four articulated fingers! https://www.thingiverse.com/thing:739806 (not my design, not affiliated, etc, etc)

    • Lucio Amorim
      Lucio Amorim  17 hours back

      This was a very interesting video, much more than its title or thumbnail suggested - wich is quite rare these days :)

      • tânia santos
        tânia santos  23 hours back

        i legit applauded. alone in my room. at a computer.

        • El Catrin C
          El Catrin C  1 days back

          First this, and then we will bring aperture science to the real world

          • Deathsquad03
            Deathsquad03  1 days back

            I have simplsafe and I for one can tell u that it is the most amazing thing ever

            • William Murphy
              William Murphy  2 days back

              Rorschach test... two people being intimate

              • Retro Coyote
                Retro Coyote  2 days back

                time for mega man

                • ahmed muhammed
                  ahmed muhammed  2 days back

                  1:37 those people behind be like what are they doing here...1:38 nvm i will leave

                  • Deuce Moncura
                    Deuce Moncura  2 days back

                    I am pretty glad to see that there are very few dirty jokes in the comments of this video.

                    And this comment just backfired on me, didn't it?

                    • Μιχάλης Αρ.
                      Μιχάλης Αρ.  2 days back

                      I 've learned so many things from you!

                      • Durbar Show
                        Durbar Show  2 days back

                        always <3

                        • E&A Productions
                          E&A Productions  2 days back

                          soooo... what your saying is that the iphone 6+ was actually good???

                          • Rainbow Zeebra
                            Rainbow Zeebra  2 days back

                            this video should have been named "how to arm nuclear weapons" to get more views

                            • joecugo
                              joecugo  3 days back

                              Simplisafe is garbage

                              • Jorge
                                Jorge  3 days back

                                The elephant sh#t broke my mind. Thanks.

                                • Not A Sith Lord
                                  Not A Sith Lord  3 days back

                                  Simplisafe is an unreliable product that you don't want to rely on for your home security. Please hire a security professional to install a hardwired system or approved UL/ULC wireless system in your home.


                                  - A security technician.

                                  • Mike Bevins
                                    Mike Bevins  3 days back

                                    In your little "Physics girl" cameo you look disheveled almost like if you just had sex ! Just saying

                                    • Beef Jerky
                                      Beef Jerky  3 days back

                                      Why is Veritasium so interesting!

                                      • C1N3M4T1x
                                        C1N3M4T1x  3 days back

                                        9:17 that already exists🤔

                                        • Pepeijn Hazelhof
                                          Pepeijn Hazelhof  3 days back

                                          Lot of plastics how about metals

                                          • Ostravak
                                            Ostravak  3 days back

                                            How they worked out material fatigue?

                                            • EpicEpidemic
                                              EpicEpidemic  4 days back

                                              #9 "Private"

                                              • Yawg moth
                                                Yawg moth  4 days back

                                                Woah, dude has greys in his beard now. Where has the time gone?

                                                • MIKHELOVIČ COOLLINAN
                                                  MIKHELOVIČ COOLLINAN  4 days back

                                                  For 3D printing, what plastic would be best?
                                                  PLA is not very flexible I know

                                                  • Jari Fuller
                                                    Jari Fuller  4 days back

                                                    very cool...thx

                                                    • Fharish Ahmed Clips
                                                      Fharish Ahmed Clips  4 days back

                                                      Most Cringe moment 7:56

                                                      • Ricky Downhill - RDH
                                                        Ricky Downhill - RDH  4 days back

                                                        This is all very cool, but that microscopic stuff is nuts!!

                                                        • M
                                                          M  4 days back

                                                          Yea because we have not enough plastic on earth xD

                                                          • Chris
                                                            Chris  4 days back

                                                            These guys at 1:37

                                                            • crazyassailant
                                                              crazyassailant  4 days back

                                                              At about 3:44, you ask the question about how long the switch piece lasts. He referenced fatigue testing which got over a million cycles before failure. Is there any kind of metric or estimation to what that equates to in terms of time in real-world use? How long would that be expected to last?

                                                              • Jenn Hoff
                                                                Jenn Hoff  4 days back

                                                                Wow, this guy is amazing!!!

                                                                • Kanishk Gang
                                                                  Kanishk Gang  4 days back

                                                                  The thumbnail is demonitized.

                                                                  • Teerin Varongchayakul
                                                                    Teerin Varongchayakul  4 days back

                                                                    this is the coolest tech ever!

                                                                    • Dylan Dreisbach
                                                                      Dylan Dreisbach  5 days back

                                                                      Time to get my 3d printer set up again! They are quite cheap if you don't mind being on your own setting it up and troubleshooting and calibrating.

                                                                      • t guanni
                                                                        t guanni  5 days back

                                                                        So damn cool...

                                                                        • fernando jaimes
                                                                          fernando jaimes  5 days back

                                                                          my reaction to this is just... :O WoW, awesome

                                                                          • Victor Sebastian S.
                                                                            Victor Sebastian S.  5 days back

                                                                            just just.. instant subscribe

                                                                            • Charterf 7
                                                                              Charterf 7  5 days back

                                                                              Ipad 11 bend

                                                                              • ufewl
                                                                                ufewl  5 days back

                                                                                just a realty bad video a waste of time, wont be subscribing

                                                                                • ufewl
                                                                                  ufewl  5 days back

                                                                                  What the fukc is going on at 6.07 we cant see what is going on or what she does so for someone who explains science it is fukcing uselss

                                                                                  • Abdel Hakim
                                                                                    Abdel Hakim  5 days back

                                                                                    i can watch your videos all day long one of my favorite YouTubers

                                                                                    • Luis Molina
                                                                                      Luis Molina  5 days back

                                                                                      Bender likes this video.

                                                                                      • Heaven Josiah
                                                                                        Heaven Josiah  5 days back

                                                                                        Man, if that can work with the electricity conducting paint, it will be crazy awesome

                                                                                        • Delphin Outfits
                                                                                          Delphin Outfits  5 days back

                                                                                          complaint mechanism means soft transition, more flexible, viable

                                                                                          • archisaurus
                                                                                            archisaurus  5 days back

                                                                                            What an incredible video. Thank you

                                                                                            • Post Cancel
                                                                                              Post Cancel  5 days back

                                                                                              I want that Elephant rump!

                                                                                              • Дмитрий Д
                                                                                                Дмитрий Д  5 days back

                                                                                                I should mention that you have compliant mechanism. It is buttons in your computer mouse. Quite old and proved design of buttons.

                                                                                                • Jacob Mathew
                                                                                                  Jacob Mathew  5 days back

                                                                                                  So that Atom bomb arming mechanism was another WATCHTIME-BAIT?

                                                                                                  Came after seeing HOW TO VIRAL video.