How NASA Reinvented The Wheel

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NASA have made a wheel capable of withstanding tough Martian terrain, but just how indestructible is it? Head to hensonshaving.com/veritasium and enter code 'Veritasium' for 100 free blades with the purchase of a razor. Make sure to add both the razor and the blades to your cart for the code to take effect.
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A huge thanks to everyone at NASA Glenn Research Center for having us at the SLOPE Lab, showing their work on this indestructible tire, and helping with the science and animation.
A huge thanks to everyone at Smart Tire Co for showing us around their facility, teaching us about nitinol, and letting us flatten their tires.
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References:
Steel Rod Footage - ve42.co/SteelRod
H. Föll. 8.4.1 - Martensite. University of Kiel, Faculty of Engineering - ve42.co/Foell
Bhattacharya, K. (1998). Theory of martensitic microstructure and the shape-memory effect - ve42.co/Bhattacharya1998
Bhattacharya, K. (2003). Microstructure of martensite: why it forms and how it gives rise to the shape-memory effect (Vol. 2). Oxford University Press. - ve42.co/MartensiteBook
Shaw, J. A. (2008). Tips and tricks for characterizing shape memory alloy wire: part 1-differential scanning calorimetry and basic phenomena. Experimental Techniques - ve42.co/Shaw2008
Buehler, W. J., Gilfrich, J. V., & Wiley, R. C. (1963). Effect of low‐temperature phase changes on the mechanical properties of alloys near composition TiNi. Journal of applied physics, 34(5), 1475-1477.
Kauffman, G. B., & Mayo, I. (1997). The story of nitinol: the serendipitous discovery of the memory metal and its applications. The chemical educator, 2, 1-21. - ve42.co/Kauffman1997
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Special thanks to our Patreon supporters:
Emil Abu Milad, Tj Steyn, meg noah, Bernard McGee, KeyWestr, Amadeo Bee, TTST, Balkrishna Heroor, John H. Austin, Jr., john kiehl, Anton Ragin, Benedikt Heinen, Diffbot, Gnare, Dave Kircher, Burt Humburg, Blake Byers, Evgeny Skvortsov, Meekay, Bill Linder, Paul Peijzel, Josh Hibschman, Mac Malkawi, Juan Benet, Ubiquity Ventures, Richard Sundvall, Lee Redden, Stephen Wilcox, Marinus Kuivenhoven, Michael Krugman, Cy ‘kkm’ K’Nelson, Sam Lutfi.
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Written by Derek Muller, Katie Barnshaw, & Emily Zhang
Edited by Trenton Oliver
Animated by Mike Radjabov & Ivy Tello
Coordinated by Emily Zhang
Filmed by Derek Muller, Emily Zhang & Raquel Nuno
Additional video/photos supplied by Getty Images & Pond5
Music from Epidemic Sound
Produced by Derek Muller, Petr Lebedev, & Emily Zhang
Thumbnail by Ignat Berbeci

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2023/04/28

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SΛΞV 5 ヶ月前

I love that these 2 engineers are so happy with their work, they look genuinely happy.

poplicker4 5 ヶ月前

who wouldn't be knowing they are on the brink of revolutionizing basically every industry $

UnorthodoxPickle 5 ヶ月前

everyone is happy when they get to do what they love

Daren Kaji Wolf 5 ヶ月前

I wonder why...

Ricardo Astley 5 ヶ月前

No, they’re not

Climactic Chaos 5 ヶ月前

We are all nerds here.

Usama Asif 4 ヶ月前

As a dentist, we use NiTi alloys in our dental files for root canal treatments. Really interesting to see its applications in other fields!

Eddie Burke 4 ヶ月前

Is the application similar? Does applying heat to it help it “set”

Vadow 4 ヶ月前

Isn't it also used in braces?

Juliano Fischer Rauber 4 ヶ月前

@Vadow Yes, in self ligated braces.

MCMXI 4 ヶ月前

@Vadow My orthodontist used NiTi in my braces about 30 years ago. I'll never forget him applying cool and watching the wire go limp then applying heat and instantly regaining the shape for my teeth.

MUSICA & ARTE 3 ヶ月前

Vascular stents!

Valkyrie 3 ヶ月前

They use this metal in orthodontia too. The wires for braces are made out of this. They are “programmed” as the parabolic shape that the orthodontist wants, then bent and tied into the braces. The heat of the mouth (aka your body heat) makes the wire “want” to return to its original shape, thereby pulling your teeth into the proper position! I was amazed when my orthodontist showed me this, it was super cool to see as a kid.

Asherandai 3 ヶ月前

Wait... so why when I had braces as a kid did they need to constantly be tightened and adjusted? Or is it a newer thing in orthodontics? Edit: Also my teeth wanted to return to their original position as well... 5 years of braces and retainers did nothing!

Koffing 2 ヶ月前

@Asherandai because its obviously a new tech

Luke Porter 2 ヶ月前

@Koffing Imagine thinking everyone knows about all technology and when it was created and used. He asked a question because it wasn't obvious to him.

5MadMovieMakers 3 ヶ月前

Engineers who never "tire" of their job!

Nezzen 3 ヶ月前

oh brother

Md 2 ヶ月前

that was so terrible. never try puns again. it's not your thing

AkuroPL 2 ヶ月前

@Md its a type of humour, so it's not your thing either

Lucien Moolman ヶ月前

That was so bad it became good

Fire Slug ヶ月前

🐑🪘🐍

Bradley Garlak 4 ヶ月前

I’ve never clicked on a video so fast. My great uncle was one of the lead engineers on the old moon rover tires. I’m so glad that they included it into this video and even though my uncle just passed away I know he would be thrilled that we are taking the next generation of tire for space travel for a spin.

Lunar 4 ヶ月前

Rip grandpa you did a good service 🫡

smolltaco 4 ヶ月前

I hope the next gen space cars have v8s in them

Rishabh Agarwal 4 ヶ月前

@smolltaco Sorry to break it to you man, but combustion engines dont work in space. There's no oxygen for combustion up there

smolltaco 4 ヶ月前

@Rishabh Agarwal who said the engine has to be exactly like the ones we have down here? You could just seal it and put oxygen in it

Cloudy 4 ヶ月前

@smolltaco I'm only a STEM student and not a fully fledged engineer but I suspect that would make for a pretty short ride compared to nuclear/electric vehicles Still would be mucho cool

Rodrigo93vg 4 ヶ月前

One more interesting application is on seismic design of structures. During my undergrad I worked at the laboratory of the University of Ottawa with 2 PhD students that were investigating how to use Nitinol rebars and external reinforcement. Goal was to to allow for additional strain without failure of structures and to potentially recover the deformation under severe seismic events =)

Fozzdaddy12 5 ヶ月前

As an engineer I’ve known of nitinol for a while, did some labs with it in college. But I never saw the example of bending the nitinol pipe in half and have it return to shape. Awesome material

The SMART Tire Company 5 ヶ月前

it's super cool to feel in person. that hot/cold effect is even more than you'd think (check out the facial reactions in the video)!

ONYX 5 ヶ月前

hell yeah we use it dentistry and are also taught all about it ,especially for root canal instruments and for braces and orthodontic appliances.. but just like you never knew it was used in so many different ways ,crazy that all these fields have this material in common

Repent and believe in Jesus Christ 5 ヶ月前

Repent to Jesus Christ “I have been crucified with Christ and I no longer live, but Christ lives in me. The life I now live in the body, I live by faith in the Son of God, who loved me and gave himself for me.” ‭‭Galatians‬ ‭2‬:‭20‬ ‭NIV‬‬ J

harpintn 5 ヶ月前

I first read about it in the late 70's

Mihael 5 ヶ月前

@The SMART Tire Company For how long does the bent part stay warm?

Jake Perrine 4 ヶ月前

My father was on the design team for the Apollo rover (and LEM,etc.) and received an award for his team’s design of the rover tires. It’s so cool to see this generations upgrades to the concepts they used back then!

imSowr 3 ヶ月前

one of my customers was one of the engineers that was hired to study Nitinol in the late 60’s and 70’s he’s still inventing today and is currently close to a breakthrough in magnetics

RecordStoreWhore 3 ヶ月前

China has entered the chat...

Dagobert Trump 2 ヶ月前

What kind of breakthrough?

Gratitude Sacred Awakening 2 ヶ月前

I would also like to know, I’m intrigued.

Jim Flood 4 ヶ月前

This was super interesting. Would love to see a follow-up video going into some of its limitations and why we haven't seen it more in industrial use for something that was discovered in the 60s.

panner11 3 ヶ月前

One of the big ones is just that it's pretty expensive

Asherandai 3 ヶ月前

@panner11 So were computers back then. But the costs came down massively as they improved and got better at making them. So if it really is still so expensive, the question is what's stopping them from improving and getting better at making them?

pkm nogosari 2 ヶ月前

@Asherandai the material is titanium, how many things are made of titanium? Shows you how rare they are

Asherandai 2 ヶ月前

@pkm nogosari titanium is the fourth most abundant metallic element, and the ninth most abundant element overall. It’s not rare at all, so it shouldn’t be so expensive.

codediporpal 4 ヶ月前

This is truly amazing science journalism. I had no idea such materials existed.

Ariel Miles 4 ヶ月前

The fact that I understand Young's modulus way better in the 15 seconds of explaining than the 6 months of learning it in my A levels syllabus 😃

The Program 4 ヶ月前

This Old Tony also did a great video on this a long time ago. But while I'd heard of memory alloys, this was the first time I felt like I really understood them.

No BS 5 ヶ月前

We need more stuff like this to help the public understand that NASA is not an expense, but a great investment that pays back more than double.

That Gamer Alex 5 ヶ月前

No Bc bad for capitalism

Earthling 5 ヶ月前

@That Gamer Alex Exactly. Capitalism values short term gains way more than long-term returns.

No BS 5 ヶ月前

@Carlos Quinto Not weird at all. That is how national investments work. Just like with public education. The Post WW2 tech boom was fueled by major investments in public science education. Some people think that because a percentage of students flunk out, that the investment is not good, when in fact, the benefits far outweighs the loss. The smarter the country, the richer it will be.

Alex Coe 3 ヶ月前

Very cool, I’m in medicine and we use Nitinol stents a lot- interesting to learn how they retain their shape and are able to apply the necessary radial forces to a stricture

Adrian Rahardjo 2 ヶ月前

In the first 10 minutes, they basically covered several key topics of a Materials Science degree in a very interesting and memorable way. I really wished this video was available a few years ago when I was still in uni...

bob 2 ヶ月前

they were this channel is old and you had stuff like nile red too and a bunch of other channels

《dobber 》 22 日前

@bobhe said he really wished this video not videos by this channel or just other quality science videos he specifically said THIS VIDEO

Mark LaPointe 3 ヶ月前

Wow, what a cool video and comprehensive demonstration and explanation of nitinol and its applications! Great job on this one, probably one of my favorite Veritasium videos. And thanks to everyone at Glenn and the contractors that work on this awesome tech and explained it so thoroughly!

1weck1 4 ヶ月前

The applications for this material is insane! Great video once again. Thank you for making learning so interesting and approachable

cubandarknez 4 ヶ月前

alloys and material science in general is so freaking cool. If you track the progression of industrial technology throughout history, a lot of it had to do with working our way up the "material technology tree" per say, since even if we had an idea for something, we didn't necessarily have the material science tech to actually make it happen, and then at every new breakthrough you then unlock so many new possibilities.

GillyTech 5 ヶ月前

I discovered a congenital defect in my heart at age 34. It was a penny sized hole in the two top chambers called the atria. They used a nitinol device to close the hole and allow heart lining cells to grow into it. This stuff saved me!

Morgan Madej 5 ヶ月前

That is Fantastic! You are a living example of High Tech Heart!

Johan Metreus 4 ヶ月前

Glad they caught it in time, required my sister a stroke at the age 27 to find out she suffered the exact same problem.

GillyTech 4 ヶ月前

@Johan Metreus yes that’s really unfortunate and I hope your sister is doing better now. I too had a minor “mini stroke” called a TIA when I was about that age but didn’t report it as it only lasted a few minutes. More people should be aware of this condition and screening when you’re young is extremely simple.

calimalu79 Cali 4 ヶ月前

Are you on any blood thinners or just aspirin? Always wondered when it came to heart application and age.

GillyTech 4 ヶ月前

@calimalu79 Cali matter of fact I’m on no meds at all. Aspirin for the fist 6 months then nothing 👍

Gorilla Cels 5 ヶ月前

absolutely love you work, and i have seen you grow. learned so much and you always keep it exciting. i have a question for you, would you throw an object further, if you threw it into the direction of earths rotation? what do you think?

Sir Zorg 5 ヶ月前

It would be interesting to know how the thermal conductivity of this affects things. If it's a low thermal conductivity, then I would imagine that the tires would be susceptible to overheating and therefore melting, undergoing permanent deformation as a result. I am grateful to my cousin who has been enthusiastic about NiTi for years now.

Tyler Durden 2 ヶ月前

It has a melting point of 1300°...similar to steel. It retains nearly all it's strength up to 400°C, then slowly decreases until 1300°C. 100°C (the boxing point of water) is too hot for normal rubber tyres. It has low thermal conductivity, but so does rubber. Yet even rubber wheels with it's comparatively low melting point seems to have no problems with heavy use. Nitinol "eats" heat to go back to martensite. It's more likely to become ice cold, from heavy use. You could even use this effect to make a fridge.

Game Wisdom 4 ヶ月前

I'm curious how loud a metal spring tire on roads would be. That would be an interesting part of the discussion before cars in cities start using these.

Mykel Miller 4 ヶ月前

The temperature, strain, stress graph at 10:58 was so helpful. Thank you!

Van Something 4 ヶ月前

I've bounced around a few schools and had the learn about the Stress-Strain Graph (or Hooke's Law) like 4 or 5 times. I thought I understood it pretty well. BUT your explanation combined with the insanely good graphics gave me a deeper understanding of it. I really liked the red line going from the video to the graph! Back to watching the video

ASTiG Studio 5 ヶ月前

Veritasium videos are the type that don't need any fancy high pace over energetic editing needed. I will watch the video all through out no matter what

Mantra Chhaya 5 ヶ月前

For real man !! I wait eagerly for a new video from veritasium, and untill a new video comes i visit the old videos, or watch old Vsauce videos,

RokoChoco 5 ヶ月前

they need comment bots though

Andrew Kennedy 5 ヶ月前

I watch it all the way through, but I have to do it at 1.5 speed...

Sleeping duty 5 ヶ月前

Jhonny Harris: why attac me?

Ivan Martin Del Campo 3 ヶ月前

I vividly remember in my gen chem lab class at uni we had an experiment where we messed around with Nitinol and I was completely in shock and awe with how it was behaving. I want to say that day was the moment I fell in love with material science and now love learning and researching about polymers as a chemist!

Vanilla Thunder 5 ヶ月前

Great video. Truly an amazing alloy with so many potential applications. I do wonder how the original/ "parent" shape of Nitinol is formed?

Rikorage 4 ヶ月前

I would guess it would be some kind of pressurized mold that they have to facilitate the shape. They blend the materials in the mold for the shape, and when it creates the alloy, that's how it keeps its original shape. It could also be some kind of injection mold, like they do for resins for certain applications, each material is kept at a separate temperature, but brought together at a higher or lower temperature with a catalyst, I assume, to create these materials (the alloy).

Ulrich Petri 4 ヶ月前

It’s explained in the video at 10:51

Vanilla Thunder 4 ヶ月前

@Ulrich Petri ah so it is, thank you for directing my attention back there

Karen Blackwood 4 ヶ月前

I love how excited they are speaking of how they work , it's absolutely amazing 🤩 thanks for the video everyone 😊

JS 4 ヶ月前

This is the best Veritasium video I have seen in a few years. I have been subscibed to the channel since the beginning, but lately I haven't been finding the videos as interesting as I once did. However this one I loved! It's probably because I am an engineer working in aerospace and I like to see the applications of things. Physics are fun, but I appreciate seeing their practical real-world applications.

Warlokk 4 ヶ月前

this is so cool, i cant believe ive never heard of nitinol before, there are so many possible applications for this, hopefully we have/will find other materials that can do other cool stuff in the future too

Konstantin Lasko 5 ヶ月前

I love the excitement and positive energy from all those engineers! They’re really happy to show their work.

The SMART Tire Company 5 ヶ月前

We genuinely love what we do and hope to have a major impact in the future!

Primaeva 5 ヶ月前

Well, they were given license to break the core tenet of every unimaginative boss and risk-averse superior ever, I'd be pretty stoked too!

Wulfstajn 3D 5 ヶ月前

welp I'd be hyped too working with magic metal everyday, damn wizards right here

Aman Sukubhattu 5 ヶ月前

@The SMART Tire Company someone just made a brand new account just to reply to the comment 💀💀💀

KOB 4 ヶ月前

Fantastic. Been curious about Nitinol for over half a century and this is the best bit on it I've seen yet. Thanks

logan kevin 4 ヶ月前

Mindblowing video. Thank you for the effort that goes into producing this content.

Norway 4 ヶ月前

Brilliant episode, Veritasium! But I do wish you could have talked about electric conductivity as well. Important property.

Stephen Woo 4 ヶ月前

Nitinol is such a cool material. At my old work, operating small medical device assembly machines, we would often have to use sticks with nitinol wires attached to poke the parts along. I found out that I could make the wires into a simple knot, and they would spring right back to straight after. My brain said both, "This is cool," and also "This ain't right," because that's not how traditional metals are supposed to act.

Dylan Fletcher 4 ヶ月前

Nitinol has been around for a long time I’m surprised it’s taken this long to see it being implemented in newer technology it really is a amazing alloy I remember watching videos on creating generators with the use of nitinol. I’m pretty sure I had glasses made of the same stuff at one point too. Unfortunately they weren’t 100% nitinol and eventually broke around where the screw threading was. I do find this video interesting though because I had often wondered how nitinol would behave in the cold of space hopefully by the time I finish watching some of my questions will be answered.

Ethelred Sernays 4 ヶ月前

Holy crap man, thank you so much for this video. The history, the details, the science. Great stuff!

Chris931 3 ヶ月前

Really cool tech! Wondering how expensive the production and processing is if used in big numbers.

Nathaniel Henderson 4 ヶ月前

I wonder how well they'd do on ice and/or if they a studded tire design, or if they're more like an all-weather tread design... Either way, they're still pretty sweet.

Inujosha 4 ヶ月前

Just out of curiosity, no pun intended, could fiber glass be a potential candidate for tires while adhering to the stretch parameters needed?

Eyerleth 5 ヶ月前

I had NiTiNOL wires in my orthodontics as a teenager. They worked to slowly, continually push the teeth into their new positions, rather than needing painful tightening every couple of weeks. Quite an impressive material!

Caleb Ray 5 ヶ月前

That's cool! Do you remember if they cost more than regular wires?

Tee Anahera 5 ヶ月前

What do you mean “to” slowly? Surely not too slowly as that would be a criticism of them. You meant they worked slowly.

Potterfanz 5 ヶ月前

@Tee Anahera They worked to slowly, continually push the teeth = They worked to push the teeth

My Condolences 5 ヶ月前

@Tee Anahera they worked to slowly and continually push to teeth into their new positions

Gio 5 ヶ月前

@Tee Anahera I worked to swiftly and definitively get you back in school, to improve your English comprehension.

Amana Wolf 4 ヶ月前

I'm definitely curious about the part at 17:08 with the usage of heating and cooling via deformation. It'd be cool to see it used as a spring, venting and cooling like you do a compressor minus the gas. Another thing that's got me curious is if you could generate electricity like you do with the piezo electric spark generators. If you could generate electricity by compression and expansion of the tires, while small I'm sure, it might add up to help extend the range of a vehicle. Could have one set of batteries for discharging with an aux one for charging, similar to the fly-wheel design on electric cars.

Jonathan Shtilman 5 ヶ月前

I wonder if one of the applications of this material could be to use it to build a "tether" for a space elevator. I know that this idea enters the realm of science fiction, but I cant stop thinking about that potential use!

Raymond Gilbert 4 ヶ月前

I googled nitinol engine and what it came back with looks pretty cool. Looks similar to those handheld sterling engines.

Moos 4 ヶ月前

Very interesting! How much would a car or bicycle tire made of TiNiNol cost - just the material, not the labor cost of weaving the strings.

David Dacaro 3 ヶ月前

Thanks for such wonderful content on all levels, and how sad this makes so much other media of all types.

Paul Pease 5 ヶ月前

The stress-strain curve reminded me of my PhD work on single DNA molecules. We could grab the two ends of a single DNA molecule (with laser beams, of course), and make force-extension curves. DNA also goes through a phase transition under physical strain. At first it acts like a low stretch string, where the force increases quickly as the extension gets close to the full length of the molecule. At around 65 piconewtons (65x10^-12 N) it will “overstretch” and at a relatively constant force (hallmark of a phase transition) will stretch to ~1.7 times its normal length. When the force is reduced it will go back to its original length, although there can be significant hysteresis depending on how quickly the load is reduced. The overstretching is coupled to an unwinding of the double helix, so in effect it’s a wind up toy and can be used to apply torque, e.g. rotate a microscopic bead. DNA is a super cool material, I hope Veritasium does a video on this stuff.

Sa Lina 5 ヶ月前

I did not expect someone talking about overstretching DNA in an optical tweezer in a video about Nitinol. Greetings from a postdoc doing a lot of force extensions on RNA in magnetic and optical tweezers 😅

Merthalophor 5 ヶ月前

> DNA is a super cool material Is there any form of research going on to use DNA as a main ingredient of a material? The same way e.g. polymers are used in plastic? Or what sort of (potential) applications do these cool properties you just mentioned have? Sounds fascinating!!

Raghavendran T B 5 ヶ月前

What about DNA computing 🤔

Galen Solomon 5 ヶ月前

Once again biology through evolution is way ahead of the curve. Awesome info. Thanks.

Franz Alex Gaisie-Essilfie 3 ヶ月前

After losing three tyres to punctures and sidewall bulges in less than a year (we've got very bad roads here in Ghana), I am fully prepared to have a full set of these under my car.

WillBrink 5 ヶ月前

Fascinating! Hope to see that tech trickle down for the masses soon. So much potential there.

Doggeslife 4 ヶ月前

As a rider I would require more than flat protection. Does it handle like an inflated bike tire? I'd love to hear the UNBIASED opinion of a pro racer who tried them out.

W Young 5 ヶ月前

These would make awesome passive wind energy generators. Instead of blades, just gather energy from the vibrating wires. Or blades with vibration to get all the energy.

Gabriel Reis 2 ヶ月前

Você me fez querer ser, ainda mais, imortal. Nenhum desconforto finito pode competir com a infinidade de experiências. Nada impede que a tecnologia permita a expansão de suas memorias.

Viii T 5 ヶ月前

The plane with the vortex generators was the coolest part to me. Seeing them flip up and down due to the heat was awesome.

George Fragiadis 5 ヶ月前

Nasa and Boeing studied also chevrons with shape memory alloys, bending towards the flow of the jet exhaust when taking off or landing to reduce noise( by introducing mixing vortices) and straighting the chevrons out of the flow when cruising to increase performance

Pronto 5 ヶ月前

I wonder if there are ever any scenarios where that would be not the required behavior. What about those Antarctic resupply flights or airfields in Nepal or Tibet: you might not get the vortex generator to flip back up....

JOKOWI THE GREAT PRESIDENT 5 ヶ月前

@Pronto hi...........malaysia truely malingsia

Sonny Knutson 5 ヶ月前

@Pronto Was thinking that too. Maybe some extreme temperature countries would cause issues here. I mean the air higher up is cold but it might not be colder than some of the coldest places on earth? Or similar with warmer air at ground level.

Prince Jangra 5 ヶ月前

@Sonny Knutson exactly

Halcyon 4 ヶ月前

My work produces capacitors that went to mars on the old 2005 rovers. We have testing for space use where we transition the temperature from super hot to super cold to make sure they maintain performance. Really interesting.

maryisdead 4 ヶ月前

I love how that Santo guy is really, really into the sciene and its effects. You can just see his love for it. Awesome.

chris stratton 2 ヶ月前

I have to remember, while being overwhelmed by doom and gloom news constantly, that there are so many, many individuals world wide striving in their chosen professions in engineering and science. Amazing characters.

GhostDave 5 ヶ月前

Pretty cool. I’d love to have those on my Jeep. I can see this being the next daily used replacement for the original pneumatic wheel design. Very cool science!!!

Ragzzy - R 4 ヶ月前

shoutout to Dr. Santo. he is clearly so passionate about the science and explains it so calmly so its easy to understand.

Stepex [GD] 5 ヶ月前

I'm not an engineer or physicist, but this is one of the coolest materials I've ever seen.

a good man 5 ヶ月前

Physical

Stepex [GD] 5 ヶ月前

Yeah, I'm not physical. I'm a ghost >:)

OhLongJohnson 5 ヶ月前

You haven't seen my wife yet... Just kidding, i am forever alone.

ailaG 5 ヶ月前

Especially when straightened!

too 5 ヶ月前

I said there are electric rocks just like magnetic rocks and suddenly there were all these photos of that stuff

Amynoug ヶ月前

It seems an epic alloy ! However, about using it on every cars and trucks, I don't know if roads wouldn't be damaged too much

Louis Greschner 4 ヶ月前

It's a pretty cool element, but don't assume it could replace all tires. One of the reasons we use pneumatic rubber tires on tarmac is because if the huge amount of loads it can translate in many directions. So, for example, a high performance sports tire has quite a different job than this rover tire. It's great for hard terrain, it's great for applications where the tire needs to endure various rough physical terrain loads. It's not great if you want to go fast, or break fast, or quick direction changes.

Mukund Kalantri 2 ヶ月前

Maybe I missed something... But how would this tire behave on really cold planets? Won't it deform a lot, and then would need some heat to get back into shape?

Ryan Wiese 4 ヶ月前

This is literally one of the coolest and most fascinating things I’ve seen in a very long time. Awesome video! Made me subscribe to your channel without even looking at a single other video on your channel lol.

Kim Wilson 4 ヶ月前

I am wondering if the heat/cool effect on flexing the nitinol could be used to generate electricity on a rover while it is traveling

Md Ashraful Islam 5 ヶ月前

As someone deeply passionate about material science, I found this video on NASA’s development of the Spring Tire to be incredibly fascinating. It’s amazing to see how research conducted by NASA eventually trickles back into commercial usage and benefits us all. Thank you for sharing this information with us!

Grim Affiliations 5 ヶ月前

Makes you realize that the government is actually more innovative than a lot of private companies. They come in after the government has spent a lot of time on research and development

Red Pill Satori 5 ヶ月前

@Grim Affiliations Not really, but keep telling yourself that

4stomper 5 ヶ月前

@Grim Affiliations Quite the opposite.

Grim Affiliations 5 ヶ月前

@Red Pill Satori Yes really, whether its new drugs, the internet, touchscreens or GPS, it's been government driving innovation

John Yepthomi 5 ヶ月前

@Red Pill Satori kindly elaborate rather than simply sounding like a contrarian.

dbissett616 4 ヶ月前

I find myself wondering how the endothermic portion of the process would work without much environmental heat. Would the material fatigue in this situation?

Gabriel Pendragon 2 ヶ月前

Ooo, these really could be a massive game changer for cars. Coat with rubberb or similar material to minimize road wear and just recoat as the tire wears down without needing the massive repairs cars currently need.

Seth Schneider 4 ヶ月前

The nitinol tires obviously wouldn't have the same level of grip and performance of a normal car tire. Could they wrap one of those in a layer of rubber and achieve the same level of performance. Could you simply replace the rubber when it wears out instead of the whole thing? This is really cool stuff.

TheMagicApple Fbg 5 ヶ月前

can this act as a battery in larger quantities? how effective would it be?

Fontanelli Consultoria e Projetos Ambientais ヶ月前

One thing of many that I apreciate about this channel is that you have made effort to adapt yourself to the science language of units... The metric system. Most others want to change the world instead of adapting.

John Harris 5 ヶ月前

I did a report on nitinol in 8th grade science...41 years ago...nice to see this video explain its properties even further. Cool!!

R. C. Engineering 5 ヶ月前

It's sad that it's never found widespread usefulness.

RL 5 ヶ月前

@R. C. Engineering it just did

R. C. Engineering 5 ヶ月前

@RL where?

RL 5 ヶ月前

@R. C. Engineering they literally mentioned multiple sectors that are implementing this material for upgrading current systems... did you not watch this video?

R. C. Engineering 5 ヶ月前

@RL oh I see. Youre mistaking the possibility of niche uses for actual widespread use. They've been theorizing uses for 40 years, yet when you look around do you see this material on a daily basis?

Atheist Antichrist 5 日前

Elastic metal? How cool. How strong is it? Can it be used in applications such as armor? Fascinating.

soup 4 ヶ月前

I like how Veritasium shows all this to average nobodys at home ,teaching us how important all that is and what actually is going on and how valuable it is to the society and not just some hoax a couple old idiots want you to believe. Great job! Also gotta appreciate all the people involved in discovering and working on those projects

n00dles 4 ヶ月前

The engineer in the red shirt gave very clear explanations and interesting demonstrations, great work all around

Greg Nulik 3 ヶ月前

As nice as nitinol is , how does it handle temperature changes beyond what it's programmed for ? Are there still situations where old fashioned hydraulics are better ?

Gage LeSouder 4 ヶ月前

This is why space exploration is awesome, it leads to some of the greatest innovations😊

Salisaad 5 ヶ月前

What I love most about Derek is that he takes us to meet these incredible passionate people doing fascinating stuff.

TheAnnoyingBoss 5 ヶ月前

Thus titanium alloy is pretty wild i just wonder what its durability is. Its like as if you had a. Ultra magic paperclip.

izzynobre 4 ヶ月前

These things already look like magic to us, imagine what someone from 300 years ago would make of materials like this. They simply wouldn’t be able to comprehend it at all.

Dale Bob 4 ヶ月前

Nice to see a recap of Stanley Kubrick's most important film's! If only they had those tire's, maybe the dust NOT kicking up wouldn't be such a problem😇

Tim Fischer 4 ヶ月前

Would've been nice to know how this affects the road tho. That's a huge concern when using it on cars on earth.

Macc Rigdon 3 ヶ月前

If you think about the powder charges and projectile speeds back when the fusion happened then you think about the results you created it’s clear to me that you may need to make that into a black powder muzzle loading device or back off the powder charge and change to a slower burning powder and rechamber for a shorter OAL. I think you simply have waayyy too much momentum for fusion of the bullets and it’s just transferring energy into the expansion plant instead of fusion as heat? Thoughts?!

scot shanley 2 ヶ月前

Easily one of your most interesting episodes. I enjoyed it immensely thank you. 👍👍

O M ヶ月前

Super cool, but my question is whether it ever fatigues and snaps. Presumably it can’t just deform and resume its original shape an infinite number of times? When does it wear out?

Vatsal Pandey 5 ヶ月前

I am preparing for a solids class test, and I will be asked about everything discussed here. This video not only improved my understanding of the topic but it went beyond discussing this new material for me, the applications, different scenarios and even the history. In short, you have made a goldmine of a video. Thank You so much, Veretasium Team. I really love your channel, and you never cease to amaze me.

YUOREM 5 ヶ月前

that’s so awesome

Richard Johnson 5 ヶ月前

Worst class of my life. It sucks but you'll enjoy it and get through it.

Hope Gold 5 ヶ月前

Hope it goes well!

Bruno Nikodemski 3 ヶ月前

This is good presentation, of the long-term colonization problems, to the Moon or Mars. I am one of the last-alive design engineers of the original Lunar Roving Vehicles. One of the main problems we had, other than impact deformation & breakage, was the "abrasive wear" due to the Lunar dust. In actual testing, ordinary steel wires, of various alloys, only lasted a few hundred cycles in simulated Lunar dust. Vacuumized dust has similar properties to diamond dust. As a result, it became necessary to "coat" the wires with a sacrificial coating (zinc for LRV), in order to prevent "sawing" of the wires during flexure. It was thought at that time, that the astronaut's suits could be punctured by any sticking out wires ends. This became relevant, when a fender was knocked off, and a repair became relevant. The entire wire-design of the original LRV wheels was based on the ability to withstand wire breakage, for the duration of the mission. Other coatings were tried, but were too time-lengthy to implement, at that time. We only had about 14+months to do this. This presentation is inadequate, in that it shows testing on Earth, in conditions which cannot exist on Moon or Mars surfaces. Modern materials mathematical modeling is showing that these wire-like Nitinol wheels will have only limited useability, unless more durability is built into them, using other means. On the Moon, in the dark, the crystallization temperatures of the materials will dictate their survivability. It is probable that only some kind of "composite" structural material will survive, for very long. NASA has videos of the various impact and deformation studies which we did, and there is material available about the dust abrasiveness at their sites, and from the still remaining Boeing engineers. Bruno.

Clint Brenner 4 ヶ月前

Sounds too good to be true! Im wondering how they work on earth surfaces and at less than golf cart speeds? Traction? Heavy braking? 😅

SW_TOWER 4 ヶ月前

Did the question of how much damage these tires cause to the surfaces they're riding on come up? Mainly thinking about the applications like the jeep and such here. I'd be curious as to the noise pollution theses generate compared to standard car tires as well. Awesome video !

Hallway Raptor 20 日前

As you can see in the bike tire version, for road use they would have a layer of rubber or plastic.

Shishu 22 日前

What happens if you let all the heat dissipate after flexing the rod at 18:34? Does the rod lose its memory shape retaining properties?

grennyfell97 4 ヶ月前

It's possible that materials engineers have changed the world more than anyone else.

Nikola Tesla 5 ヶ月前

What i really like about this videos, is the fact that the people that work in these places are actually nice and kind and are willing to share the beauty of science to whoever is in front of them. That's passion right here guys

The SMART Tire Company 5 ヶ月前

The team at NASA Glenn is incredible (and we like our guys a lot too)!

GaLoS 5 ヶ月前

those first 2 tests were cringe and unnecessary. The new tire isn't holding in air, so why do a nail test?

John Lucas 5 ヶ月前

@GaLoS Well.. to show the difference. It is still called a tire after all. And seeing it getting shot by a bullet, not only not getting punctured but also not getting bent to unusable state, as a wheel, is kinda amazing.

Abish Issagulov 5 ヶ月前

Ofc not, if it wasn't a popular channel like Veritasium, they won't even care

GaLoS 5 ヶ月前

@johnlucas6683 you don't need a test to know a nail isn't going to pop a tire that can't be popped.

Dexxter 5 ヶ月前

How do these tires grip the road or the airstrip and not slip sideways or on braking? There seems to be less friction with these tires compared to normal rubber ones.

Ingpuls GmbH 4 ヶ月前

Great Video & such a beautiful technology! We are always happy to work with it from day to day. :)

Shane J-SPIRIT 2 ヶ月前

Imagine using a special version of it on a knife blade that will always return to its high level sharpness with heat and would never lose any material due to the need to sharpen it would be a knife that would last nearly forever

Brandon Hiraeth 4 ヶ月前

Love that you've partnered with Henson Razors. I got one for my birthday and it's the best razor I've ever had, very pleased. They're also based out of my home town.

Iain Riley 2 ヶ月前

Wish they had this when they designed Concorde it would of really helped with the super heating stretching and shrinking problems .

Becky Olesen 5 ヶ月前

One of my favorite thing about being an engineer is watching other engineers geek out about whatever they are working on!

Syed Abis Hosain Rizvi 5 ヶ月前

It is genuinely so much easier to talk at length to someone about a project that you've done

SkellyBobs 5 ヶ月前

I've wanted these tires for my bicycles for a long time. I will absolutely purchase the first set

William Melton 4 ヶ月前

Wow nitinol almost seems like a science fiction material. So cool that we live in a day and age where we get to be on the cusp of things like this being invented!