Perfect video of why you don't make submarines out of carbon fiber.

@TheWalkingRed

10 ай бұрын

Must be what they made the Titan out of

@TheWalkingRed

10 ай бұрын

I just looked it up. Dear Jesus, it actually was made from carbon fibre

@genki316

10 ай бұрын

@@TheWalkingRed yea it was partially carbon fiber pary titanium

@markbaz4200

10 ай бұрын

Yeah, I can’t believe that after researching metals and carbon fiber videos on KZread for just a few minutes that ANYONE would be able to come to that conclusion! May they all see Heaven’s Gates.

@genki316

10 ай бұрын

@@markbaz4200 dude was playing with people's lives for 250k each

This explains why Titan was never issued a certification of safety. James Cameron was always right about using titanium and stainless steel to build submersibles.

@rodh1404

10 ай бұрын

According to some studies, Carbon Fiber can withstand depths of over 7,000 meters. And it certainly survived several trips to the Titanic so it does work. The problem is that nothing can stand repeated dives, and as yet we haven't developed a good way to non-destructively test when Carbon Fiber has reached its limit. I should also point out that the experts don't seem certain yet the carbon fiber caused the failure. Several people have pointed to the very dodgy porthole, and some say it was the combination of the titanium end caps and the carbon fiber that was the real problem. Maybe it was even something else entirely, since it seems like safety wasn't exactly priority number 1 with Ocean Gate.

@sirelee5169

10 ай бұрын

​@@rodh1404 nice

@ChrisTrunek

10 ай бұрын

@@rodh1404 carbon fiber has ALWAYS been developed and used as a tensile reinforcement. It is common knowledge in composites that fiberglass performs similarly if not better than carbon in compression applications. Once you start pulling on the laminate in tension, carbon out performs justbout everything. I think this hull design just used so much of it (4" thick?) as to just brute force the calculations. But as many others have pointed out, typical composite laminations fail over time due to micro crack in the epoxy marix. tiny cracks occur and grow as the structure is loaded. Add extreme thermal cycling and the dimensional changes from the pressure and its gonna break down. Ive built a bunch of skis and skateboards and random parts from CF and glass, nothing too crazy but even with my basic experiences, i would NEVER pursue a CF sub for deep water. The only reason to do it this way is 1. probably cheaper than the extreme grades of metals required 2 much lighter weight, which means support systems for docking the sub needed to be much smaller and cheaper. also carbon fiber has proved time and time again that it is great at seperating rich people from their money. its a good buzzword.

@this_number

10 ай бұрын

“Rich people from their money” 😂🤣😆

@XYZAudiio

10 ай бұрын

Cameron should stick to making movies and STFU.

4:03 - Carbon Fiber 7:07 - Titanium

@sierrasymone7590

9 ай бұрын

thank you so much

@lucyno2548

9 ай бұрын

Thank u ❤️‍🔥

@soliderbred

9 ай бұрын

The titan submersible

@lumated2854

9 ай бұрын

@@soliderbred yes

@dhirajaprasad180

9 ай бұрын

You are the best

That's why Superman is the "Man of Steel" and not of Titanium !

Hydraulic Press Channel: do NOT try this at home. Stockton Rush: hold my gamepad

@iananderson8363

10 ай бұрын

😂🤣 You’re an ass! But you’re funny so it’s cool.

@kielo88

10 ай бұрын

well... didn't say "do not try this at ocean".

@Pyratheon

10 ай бұрын

Make sure you don't destroy the gamepad. We're gonna need it.

@WhatTodo11111

10 ай бұрын

Sick people talking about a dead person, why is the world so evil.... I.e people

@LegendaryStudiosCanada

10 ай бұрын

Oooh too soon 😆

Just to think, five lives could’ve been saved if that CEO guy would’ve watched the press channel 10 months ago

@captainthunderbolt7541

10 ай бұрын

It's not like he wasn't warned about his deathtrap - he fired the guy who told him it was unsafe...

@granadosvm

10 ай бұрын

He was too stubborn to care. I saw a video where he was explaining his cutting corner design with cheap lights, bare minimum instruments and game controller drive. He was saying "as long as the main structure does not fail, everything else can fail, you will be safe". Anyone with common sense would be saying "at 3,800 m depth, NOTHING should fail!"

@glitteringsunshine4306

10 ай бұрын

​@@granadosvmAccording zo recent studies, most people's common sense only goes to the shallow depth of about 300 m (on a good day).

@glitteringsunshine4306

10 ай бұрын

Naaa, don't think so. Little d!psh!t CEO Crockton CRush would've just said, "Tech has advanced 10-fold in the last 10 months. My carbon fiber, on a scale of 1 to 10, is rated 11."

@PearlCradle

10 ай бұрын

Unfortunately, the Titan Submersible was made before this channel.

Even after it started to balloon the Titanium was still holding over 7,000kg! Insane material.

@shackilleuhdeal7462

9 ай бұрын

Best thing about it is it's strength to weight ratio compared to solid steel. Lightweight and strong.

@filipebeat

9 ай бұрын

i was mo impressed by d stainless steel

@deancafe4739

9 ай бұрын

They should've included a diamond pipe.

@filipebeat

9 ай бұрын

@@deancafe4739 haha cant b though

@robertmcfadyen9156

9 ай бұрын

@@shackilleuhdeal7462 The low grade steel was "ANNEALED" for cold working by looking at it's behaviour in the test .

Carbon Fiber did better than I expected but still just doesn't handle external compression nearly as well as any of the metals usually used for pressure vessels. Stainless did way better than I expected.

@nisithamirihagalla7505

2 ай бұрын

Stainless steel is pretty strong

For the people saying that carbon fiber underperfomed: Remember that the advantage of carbon fiber is not its raw strength, but its strength to weight ratio. Titanium took 3x the force of carbon before it broke, but it also weighed 3x as much. Also keep in mind that these tests were strictly in compression, while carbon unquestionably performs its best in tension.

@pcmasterracetechgod5660

Жыл бұрын

"Titanium took 3x the force of carbon before it broke, but it also weighed 3x as much" This is true, but also the driving reason for asking why people hype it up so much if it's about the same as titanium in terms of strength to weight. Especially when you take cost into consideration.

@EACORE

Жыл бұрын

al chile si

@carstekoch

Жыл бұрын

@@pcmasterracetechgod5660 Because you can form carbon fiber into virtually any shape without much issue while it would take a lot more to do the same with titanium. Plus the price is pretty much the same. If you are just sticking norm pieces together, titanium would be better. Make it a bit thinner than the carbon tube and you'd have the same effect. If you are going to have more complex forms and a low number of units, carbon fibre becomes more attractive. There is no absolutely perfect material.

@Emeraldd_33

Жыл бұрын

@@carstekoch effect*

@carstekoch

Жыл бұрын

@@Emeraldd_33 Thanks, german auto correct took over.

One thing to note if you're watching this after the titan accident: notice that the hydraulic press starts applying less force to the material once it starts yielding. A hydrostatic column, in contrast, is not so kind

@jgtheman2011

9 ай бұрын

💯💯💯

@othusitselokailwe2857

9 ай бұрын

I think the speed that the material compresses is slower than the press

@nutinmyass

9 ай бұрын

How tf do fish and soft jellyfish just swim around that deep like nothing is bothering them

@TotalAnomy

9 ай бұрын

@@nutinmyass by being mostly made of fluid, which is in practice incompressible. What makes certain animals (and poorly made submersibles) vulnerable to pressure is gas content, which has to drastically change volume if in contact with a dramatically different pressure environment

@Agent-57

9 ай бұрын

Pretty sure the prees reached 10 tons by the end for aluminum which was much higher than the 3.8 ton limit.

Apple CEO watched this video before iPhone 15 launch 😂

@HarshSikarwar-ft7nr

Ай бұрын

Titanium kitni makhan ki tarah hua titanium bohot strong hao yaar 😊

iPhone 15 users right now 😊

After watching this I’m amazed that the Titan was able to do as many dives as it did before it imploded.

@lilith4961

10 ай бұрын

It helped that they aborted a good amount of those trips due to other complications

@Ganiscol

10 ай бұрын

Well, this isnt really indicative of much. They crush carbon fiber in the direction of the filaments, which is much, much worse than how Titan experienced pressure. However, that doesnt take away from the fact that a carbon fiber based pressure hull is bad for external pressure but superior to any metal for internal pressure. So, if you wanted to build a tank to contain internal pressure, carbon fiber will give you the best result in terms of weight and maximum sustainable pressure. But dont make a sub from it...

@excalibermax

10 ай бұрын

Also the carbon fibre layers was 5 inches thick, so probably lasted longer but ultimately either end cap glue failed or porthole or carbon fibre delimitation within layers

@StreetFighter2010

10 ай бұрын

@@GaniscolThe carbon fiber Mr. arrogant CEO used was not even laminated properly. It was all in one direction instead of crosshatched. 🤦🏻

@ianm8218

10 ай бұрын

Wear and tear was probably the reason it imploded too

Note: that carbon fiber tube was likely _stronger_ than Titan's CF because it was woven in multiple directions (though, obviously, much thinner overall than Titan). But what people keep forgetting to mention about Carbon Fiber is the danger of *repeated stress*. It might handle a given level of stress once, twice, etc. but each time adds tiny fractures and eventually it fails *without notice*. That's why carbon fiber bikes need to be X-rayed for microfractures after any significant accident. _none_ of that was done for Titan after each dive.

@TEMUCHINYONGA

9 ай бұрын

This comment is underrated.

@Thesnakerox

9 ай бұрын

I did notice that when the carbon fiber gave under the pressure, it frayed rather than shattering like I'd have expected--is that due to it being woven in more than one direction as well?

@OccamsWoodChipper

9 ай бұрын

Isn't this true to some extent with all materials? Is it just much worse with carbon fiber?

@Thedarkbunnyrabbit

9 ай бұрын

Unfortunately, people just keep repeating 'carbon fiber bad' without understanding why. It's not necessarily that it's weaker, it's that when it fails it's sudden and absolute.

@Ace-dh5lz

9 ай бұрын

Thank you for goodness sakes people are so quick to write off carbon because its "experimental" and not tested that material is plenty strong for 1 or 2 dives the deepest dive ever was done using carbon fiber 35k feet in the Marianas Trench and it was done once for a reason no repeated stresses.

Im here because of the new iphone 15 😅

Wow, these results completely surprised me with solid stainless steel taking that much pressure. Great video.

"Don't repeat this at home" Let me just pull out my hydraulic press real quick

@Senkino5o

Жыл бұрын

Less than $600 can get you a 50t hydraulic press no problems.

@slipper1889

Жыл бұрын

@@Senkino5o Really? I Though their prices starts at least from tens of thousands...

@naughtytiger1444

Жыл бұрын

No man, you gotta listen. It's dangerous. I just put back my hydraulic press once I read that warning.

@youghurt2k

Жыл бұрын

Just take your hydraulic press to somebody elses home.

@nirmalsuki

Жыл бұрын

Instructions unclear. Penis stuck in hydraulic press.

Who would of thought this video would pop up 10 months later as a suggested one for me. This press guy hit a home run when he made this and didn't even realize it would take 10 months to really "blow up" 😮

@disappointedbananas2365

10 ай бұрын

You mean *blow in*

@mew10521

10 ай бұрын

Yeah

@lise1255

9 ай бұрын

Over 11 million views. The entire population of Sweden is only 10,5 million! Well done.😊

@T800-theRealOne

9 ай бұрын

@@disappointedbananas2365 lol.

@eugenegoagoseb5095

9 ай бұрын

Who would have thought.

The carbon was only 1.5mm thick. If it were the same as the titanium, it would have had a collapse stress of 5000kg-ish. Likewise, if the carbon filaments were wound diagonally, the failure load would have been even higher. This experiment can't be compared to the Titan submersible failure. To do that, the tubes would need to be 2 feet long so that they could buckle rather than undergo ductile compressive collapse, and the load would need to be set at 80% of what would produce single load failure. So that fatigue of the carbon resin would accumulate over each load cycle, making the tube gradually weaker during each cycle.

Curious, what is the material used for the base of the hydraulic press? It seems to hold up and not be marred with any of the test materials.

It would be interesting to see this with a thermal camera to see the heat build up and spread through the materials.

@rafaeldugatto

8 ай бұрын

Yeah, I would watch this video.

@ChiquitaSpeaks

7 ай бұрын

And tungsten

@isaacbelcher4984

7 ай бұрын

Was thinking the same thing

@daudiii

2 ай бұрын

Genius video idea.

Carbon performing rather low was to be expected. Because its strength results from the fibers being arranged in the direction of stress and then being pulled. It's like a rope: Strong if you pull on it but doesn't resist any squishing

@1ZZFE

Жыл бұрын

That kind of stretching strength is called Tensile strength.

@danielhristov6175

Жыл бұрын

The main failing point of the material used was actually the resin holding together the beam. Many people be like: “Carbon fiber is stronger than steel! It’s the best material ever, it’s the future…” blah blah blah. What they don’t realize is that only the mere “fiber” is stronger than steel. Common mistake. Even aluminum showed better result… I did expect steel and titanium to outgun it but the aluminum was a surprise. Most people that are into cycling should check this video out before dropping motorcycle money for a carbon toy. XD

@fireaza

Жыл бұрын

@@danielhristov6175 You're missing the key advantage of carbon fiber: it's strong, but *LIGHT.* People don't like it simply because it's "strong", but because it's insanely light for it's strength. If you want pure strength, then sure, use steel. But if you need something that's light, but also rather strong, carbon fiber is an excellent fit.

@m.b.82

Жыл бұрын

Also, cf varies pretty wildly in quality

@_seriousrob_

Жыл бұрын

@@danielhristov6175 Compare the weight to the results and you get why carbon is a valid option. Carbon and Titanium have nearly the same result when weight normalized. It's a lot stronger than aluminium when weight normalized. That is where carbon fibre gains an advantage.

Who come to see how strong the titanium because of iPhone 15 pro 👋🏻

That was actually really cool to watch. Found it very interesting. I mostly applied and imagined the deviation of materials as it would relate to a connecting rod in an internal combustion engine.🧐

This video aged well. Stockton didn't even pass his KZread exam.

In case anyone was wondering how they ranked strength to weight wise... Titanium - 278.5 (kg/g) Carbon fibre - 272.5 Stainless steel - 267.8 Aluminium - 192 Acrylic - 170.9 PVC - 91.3 Low grade steel - 81.9 Brass - 57.1

@deathshotzz7762

10 ай бұрын

thx

@hariman7727

10 ай бұрын

So carbon fiber doesn't even have an appreciable advantage...

@golfmarguerite3970

10 ай бұрын

@@hariman7727 the price I think

@loosilu

10 ай бұрын

@@hariman7727 Price and weight. But don't forget the cylindrical shape was also a problem. Spheres are strongest under pressure from all sides. Cameron used spheres.

@XYZAudiio

10 ай бұрын

So much for my brass submarine plans. 😢

Who's here after the iphone 15 pro release?

@gamerzgeek4776

7 ай бұрын

Me😅

Why am I only seeing this after iPhone 15 Pro release?😂

Do you happen to have an infrared camera? It would be very cool to see how temperature changes when different materials being pressed!

@rob_olmstead

Жыл бұрын

Up

@pvpdm

Жыл бұрын

It wouldn't work on the metals.

@marinetechknj

Жыл бұрын

@@pvpdm why wouldn't it work on metal? I would think you would see the temperature change. The metal may show its surface as an even temperature throughout the change, but it would still be visible that the temperature is changing?

@mdyson611

Жыл бұрын

@@rob_olmstead Crushing steel objects with hydraulic press THERMAL CAMERA EDITION!

@pvpdm

Жыл бұрын

@@marinetechknj it's because infrared bounces off of metallic surfaces if I'm not mistaken.

So even aluminum is more pressure-resistant than CF? Damn! Those OceanGate fools would have had better chances in a giant Pepsi can.

@PebCak42

10 ай бұрын

Aluminium(& most of its alloys) has the same problem carbon has, cycle fatigue.

@nancymcmonarch

10 ай бұрын

@@PebCak42 I'm sure you know more about it than I do. But looking at the way the CF shreds apart here, wouldn't water have an easier time penetrating it? In any event, OceanGate had no business taking people down there anyway. As we saw in the search for them, anything people can do on the ocean floor, ROVs can do better and safer.

@PebCak42

10 ай бұрын

@@nancymcmonarch I'm not that deep into carbon, but from what I understand it's not designed for that type of strressor. It performs reasonably well in the areas it's designed for, considering weight-strength ratio. I'm more into metals.... There are a lot of factors when it comes to materials, some just break/rip without any visible warning, some deform before breaking. It's very important to know what kind of stressor the material will experience... compression vs. tension, enduring stress vs. cycling stress, element exposure etcpp, do you need visible warning or do you have other ways to detect potential flaws & failure. E.g. certain parts for high performance engines are x-rayed for potential flaws that can't be detected any other way. It's a science in it's own right. But I agree, they had no business doing what they did, especially in the way they did it.

@WildlifeWarrior-cr1kk

10 ай бұрын

Nope

@raul_jocson_

10 ай бұрын

@@nancymcmonarch That's part of the problem with CF. Once any kind of fracture of the matrix occurs, water can penetrate and start pulling apart the layers, i.e. delamination.

i wonder how much is the temperature variations (before compression and just after) of the metallic pipes... maybe would be interesting to measure these parameters.

Anyone else here because of the titan sub?

This is a great video, showing the sheer folly of the Titans construction! It is criminal that there are engineers that would’ve thought carbon fiber is a good idea for a submarine!

@zlonewolf

10 ай бұрын

metals fail but still retain "somewhat" of a shape and sub occupants might be crushed or might have small chance to survive. carbon fiber was literally "catastrophic" failure with zero chance of survival after failure of crushing integrity. It shatters instead.

@larryresnick2300

10 ай бұрын

It wasn't an engineer that thought carbon fiber was a good choice. In fact the engineer that quit did so because carbon fiber was chosen.

@hotdog9262

10 ай бұрын

not really, titan is a very poor example of that conclusion. it probably had faulty engineering for where the titanium was married with the carbon fiber hull, faulty method of applying the carbon fiber/production of the hull itself and faulty shape for deep sea diving. just to name a few. it probably had sub par solutions all over it

@hotdog9262

10 ай бұрын

@@zlonewolf probably `easily` avoidable by making the hull much thicker, so the design could theoretically much deeper(even with this shape). not having a subpar marriage of the titanium and the hull(thinner lip to support it and just glue used). not to mention a pressure chamber shaped like sphere instead of a tube. any material could have failed with this design

@daniellarson3068

10 ай бұрын

How about all those expensive bicycles out there? I feel safer on my old steel Schwinn.

So that is why a carbon fiber hull is a stupid idea.... ocean gate forgott to see some videos in youtube during the engineering...

@dickedits

7 ай бұрын

Carbon fiber is as durable as pvc 💀

@cabruin98

7 ай бұрын

Carbon fiber is great for most strength applications but not for compression. As you can see in this video, the hydraulic press compromises the fiber one strand layer at a time.

Who else got the recommended randomly after iPhone 15 launch? 😂

Best video to watch before buying an iPhone 15.🤣

Well done Oceangate for choosing carbon fiber 👏

@zlonewolf

10 ай бұрын

cf doesnt just fail when it fails. it fails like in the end of the video....catastrophically. Absolute insanity.

@lorenzoyagong7156

10 ай бұрын

they didnt watch this videoes

@yeahdefinitely6607

10 ай бұрын

…and for combining CF with composite materials and an acrylic porthole

@jerrylouis8930

10 ай бұрын

To all the "Scienceticians" observing this anecdote..... The carbon Fibre tube is weakest at the ends. The diameter of the press forces the cylinder BETWEEN the layers of carbon. So, the "failure" you see is the least surprising outcome there could be. Aside from that, CF if an additive material, titanium is a "contiguous" material. If you want the strength of Titanium, simply add more CF. As a test of perspicacity, several of the audience fails.

@Cherokeeseeker

10 ай бұрын

Ouch. Maybe too soon,but spot on.

From the safety point of view, my main concern about carbon fiber is how minimum deformation it shows before coming undone. For a vehicle like a submergible, the deformation from the titanium could mean when it starts showing material fatigue after multiple trips, there is a big chance it will be deformed and survive, allowing a post-submerging inspection to identify it's reaching its limits and decommissioning it before a fatal incident, while the carbon fiber looks for a submergible, it won't show any previous deformation until the trip when it suffers catastrophic failure..

@madabbafan

9 ай бұрын

If you look at the pipe here the weave of the fibre shows it going in two directions increacing the strength. The sub only had the fibre strands running in one direction so not as strong as it should have been.

@MrLuffy9131

9 ай бұрын

I just feel like metal is somewhat one piece so it won't really make a hole unless something punctures but carbon fiber has so many weaves that there's so many possible places for holes. It probably good for something on land like body armor where you don't have water seeping in and it's tough and lighter than steel but I wouldn't trust it going to a really deep depth where everything fails all at once and you don't know what hits you

@Ace-dh5lz

9 ай бұрын

@@MrLuffy9131 it didnt leak water... it delaminated lost its strength and failed. if it were to have "leaked" it wouldn't have been imploded. the cabin is pressurized with oxygen right so if it were to leak it would be constantly fighting the pressure of the fluids around it. they would notice the pressure instability and surface but it failed almost instantly with no possibility of taking on water.

@pablogriswold421

9 ай бұрын

The titanium (and steel, PVC, aluminum, etc) in this video failed by yield, which is gradual and detectable. Cyclic stress and fatigue causes failure by crack propagation, which can be much more sudden. Titanium is susceptible to fatigue cracking no matter how high the yield strength, so it must be designed with a maximum number of cycles in mind (just as the carbon fiber in the titan should have been). There's no good reason to make a sub out of carbon fiber, but with properly calculated fatigue life, it could have been safe just like titanium. Really though steel would be the better option because it has a fatigue limit, where if each cycle doesn't exceed the limit, the vessel will always be safe. In some cases it may be cheaper to simply say that the vessel should only complete x number of dives, which is acceptable in most materials, but at the end of the day steel is the only material with a real advantage there.

@russcattell955i

9 ай бұрын

Many metals will "complain" either visually or audibly when stressed.

Stainless steel seems so incredibly strong yet every fork I get at the restaurant has one bent tine.😮

You could try testing compositions of different materials (like using different tube materials for each layer stacked inside another), would be nice to watch too Keep it up and thanks for the great content

that carbon fiber sub didnt stand a chance

@justsoicanfingcomment5814

Ай бұрын

Carbon fiber used as a building material is not the problem. Using it repeatedly without a proper way of testing its integrity after each dive was the problem. Having a submarine with so many glitchy, twitchy, defective safety mechanisms and systems in general was also a problem.

As a metallurgist and fdy engineer I pulled test bars all the time..the psi ratings depending on the alloys was important. Strength, ductility vs wear and fatigue in operation was crucial. CF has flat strength in stress, but no ductility and fatigues quickly. Test bar pulls gave you the boundaries of useage in desired applications.

@FlatOutFE

10 ай бұрын

It doesn't fatigue quickly. Many aircraft manufacturers are using carbon fiber wing spars because their fatigue behavior is much better than aluminum.

@guitarplayer1495

10 ай бұрын

carbon fiber is very durable and has a long lifespan. the same piece oceangate got was a recycled piece from an old aircraft.

@larrybe2900

10 ай бұрын

Half of a wing is in compression so CF is not suited.

@FlatOutFE

10 ай бұрын

@@larrybe2900 Bike frames are made from carbon fiber everyday. The top bar is under significant compression. Wing spars are indeed made with carbon fiber caps separated by a shear web. Carbon wings are quite suitable. The compression strength of titanium is 50% of its tensile strength. The compression strength of stainless steel and aluminum is 40% of its tensile strength. The fact that carbon fiber is weaker in compression is like every other structural material.

@davidhenningson4782

10 ай бұрын

@@FlatOutFE in tension yes.

Fascinating and prescient to compare all these materials. Well done!

@lauramcelhiney

9 ай бұрын

Wallach 👋

Apple got the idea from here😂

If only Titan used Titanium...

@Model3GenerativeANdroid

10 ай бұрын

_I'm bulletproof, nothing to lose_ _Fire away, fire away_ _Ricochet, you take your aim_ _Fire away, fire away_ _You shoot me down,_ _but I won't fall_ _I am titanium_

@rearspeaker6364

10 ай бұрын

@@Model3GenerativeANdroid The A-10's "bathtub".

@khallrik

10 ай бұрын

they did... but only for the endcaps... which survived generally intact, of course.

Thats why you dont go down 2.5 miles with carbon fiber lol

Apple are probably gonna ask you to take down this video after this year’s epic fail 😂

Ur vernier callipers are insane!

Here is the ranking: (stainless steel held 15800Kg with 58.62g in pipe shape, which means it held 270k times its own mass but isn't the strongest here) 1. Titanium: 9190kg/32.63g= 282k times own mass 2. Carbon fiber: 2998/10.91= 275k 3. Stainless steel: 15800/58.62= 270k 4. Aluminium: 3840/19.76= 194k 5. Acrylic: 1538/8.69= 177k 6. PVC: 1004/11.43= 88k 7. Steel seam pipe: 4750/57.56= 83k 8. Brass: 2568/45.16= 57k

@alejo_m9447

Жыл бұрын

The comment I was looking for! Thanks for saving me the hassle 🙂

@spy_balloon

Жыл бұрын

Nice

@soytupappa

Жыл бұрын

Acrylic and pvc are about 50% and 300% stronger than brass respectively. I would have never guessed it

@blinzi69

Жыл бұрын

titanium and brass are wrong, they started to deform way before the marked pressure in the video - watch it again Brass started to deform clearly around 1900-2000kg and Titanium started to bend around 7000 already, while carbon fiber held until 2900.

@CurtBennett1

Жыл бұрын

@@blinzi69 What's being measured is the max pressure it can withstand before catastrophic failure. Deformation obviously isn't good but it's not up to the level of catastrophic.

Who’s here binge watching after the tragic submersible incident?

@ethanmac639

10 ай бұрын

me

@marcusatm

10 ай бұрын

Yep

@edaguiadan4301

10 ай бұрын

Me best for submarine metal stainless steel

@MrOptimusheath

10 ай бұрын

Think Ill place all my bets on titanium thanks .. watching that carbon fiber tear lol

@Significantharrassment

10 ай бұрын

It's me! It's MEEE!!!!!

Would be amazing if you could build a strong water chamber for the press to push pressure into. My understanding is that old steel foundries are used for this purpose at depth testing research facilities. Being water exerts pressure equally around instead of just the ends, the results could be interesting. I'm willing to bet the investigation on the Titan will do such tests at these facilities with mockups based on the production methods of the sub's pressure hull. Really nice tyo see stainless so strong. Which stainless ASTM grade was that? 304? 316?

love how this is just a video comparing materials and is now flooded with titan comments lol

This video would have been useful for OceanGate.

@pulaski1

10 ай бұрын

Nah, this is "old white guy" technology, so irrelevant to Oceangate.

@giovannimontagnana6262

10 ай бұрын

I guess they uploaded on KZread too late

Granted, it was 40 years ago in a high school Physics class, but the teacher had us go over the properties of each of these materials (except for pvc and carbon fiber) in addition to giving us a multitude of various shapes (squares, triangles, cylinders, rhombuses (rhombi? = ), etc. to choose from to test out our hypotheses of which materials and shapes would perform best in a deep ocean dive, which he had very wisely tied to diving down to the Titanic, although it's exact location hadn't been determined at that time. After much debating and running the numbers among classmates, we all had to agree that the sphere was EASILY the best and safest form. So, this was a HUGE part of the reason why we were so shocked when we first saw the cylindrical shape of the Titan. We immediately knew it had imploded, even before the Navy said they had detected it that Fathers Day with their equipment. Difficult to comprehend how such educated guys could be SO foolish with their own lives!

Very interesting, testing these materials in shearing would (in my opinion) be more interesting. Have you ever made it?

If only OceanGate CEO had watched this first.

This is absolute insanity, I was literally doing this exact experiment at home when I stumbled across your video, and because of your warning I just packed away everything instead.

@EvanRath

Жыл бұрын

amazing, you possibly saved him from a calamity of epic proportions!

@mattmarzula

Жыл бұрын

Bullshit.

@secret4243

Жыл бұрын

@@mattmarzula wooosh

@vasiovasio

Жыл бұрын

Sarcasm Level Infinity! ;)

@nivington

Жыл бұрын

the sarcasm was so strong I didn't realize it was a joke at first

watching this after news of the Titan Oceanside sub, the difference between carbon fiber and titanium is huge, thats crazy

@zarbon700

10 ай бұрын

The CF on the Titan was actually weaker than the one in this video. CF tubes are stronger at taking compression when vertical than horizontal. Titan was doomed to fail.

@forbidden-cyrillic-handle

10 ай бұрын

And nobody makes subs from titanium either. Steel is the best material that is relatively cheep for what it can withstand.

@kiyoshim9593

10 ай бұрын

@@forbidden-cyrillic-handle Yeah they do. RUssians do it all the time but guess what. most titanium comes from Russia. Anyways the best thing ocean gate could've done is to just use a steel pipe and add more bouyancy

@tonystark2115

9 ай бұрын

@@zarbon700 thats even crazier

Do you ever record the temperature change as the pressure is applied?

Stainless steel has the highest force per area (psi), while titanium has the highest force per weight ratio. So, if you want strength and you don't care about weight, choose stainless steel, and if you want the least weight that can shoulder the most force, choose titanium.

“Don’t repeat at home " …. Damn, what à I going to do with this massive hydraulic press in my kitchen now ?

@willmcgo8288

10 ай бұрын

Make flat bread.

@theluc1f3r93

10 ай бұрын

Hydraulic pressed orange juice hmm :D

@aliveandwellinisrael2507

10 ай бұрын

Given recent events, some people do have to be told not to put carbon fiber under immense compressive force

@jj-pi9cu

10 ай бұрын

the ironing

@vorda400

10 ай бұрын

😂my wife's cakes are sometimes so hard they could be parts of that hydraulic press

9:42 "IT'S OVER 9000!"

I wonder what would be the readings if they put Stockton Rush's ego in that hydraulic press...? Never mind, I imagined that the press would break.

Is this what happened to that titanic tourist submarine? It was pretty much a carbon fiber tube.

@nancymcmonarch

10 ай бұрын

Yep.

@nerd1000ify

10 ай бұрын

Not really, different loads involved. Subs get squeezed from all directions, not just top to bottom.

The strength of that fragile acrylic is most impressive to me.

@zwqasdfzaani814

Жыл бұрын

Yeah that one surprised me as well.

@hiveknight3853

Жыл бұрын

If you saw a serious testing of acrylic it will shock you for sure, the testing on this video is done by a non professionnal, acrylic is used in field where he outperforms even stainless steel.

@mikldude9376

Жыл бұрын

Yeah same thoughts here , very tuff stuff for plastic.

@florianwa1636

Жыл бұрын

Geometric

@biggestnamer

Жыл бұрын

yeah they are really strong

Now I wonder about glass! Great video, I want to see woods and other stuff now! haha

3:36 looks like a guy tryna oppose the press and then getting squashed

This video clearly explains the failure of titan sub craft😊😇

And this is the reason why no one else but OceanGate built a submarine out of Carbon Fiber even though CF has been around for over 60 years.

I was just about to get my industrial press out to repeat what I had seen. But luckily I saw your message.

Id be interested to see both a pull and sheer test on all of these.

Too bad a certain submarine company didn't watch this video.

@parvesh.5_357

10 ай бұрын

Oceangate?

@bishopp14

10 ай бұрын

​@@parvesh.5_357No, the other one.

@Fairlane55

10 ай бұрын

@@bishopp14 😆 hahaha

@mrki412

10 ай бұрын

Who gives a Sht! about rich tards that want to see ship wreck?! Everyday innocent ppl and children die all over the 3rd part countries and you don't whine...

@bishopp14

10 ай бұрын

@@Fairlane55 😁

I would LOVE to see the same tests done horizontally instead of vertically to see how much pressure it takes to crush/break them that way!

@tubularap

10 ай бұрын

Yes. He does have a video with titanium and CF plates, doing bending tests. Not cylinders pressed from the side, but still interesting. I'm going to watch it now. [correction:] The video shows bars from various materials (not "plates").

@bigbusiness6067

10 ай бұрын

Probably a lot less pressure if done that way

@kiyoshim9593

10 ай бұрын

@@tubularap from the sides? would be nice to see who wins PVC of CF

@tubularap

10 ай бұрын

@@kiyoshim9593 - Yeah, PVC was remarkable strong.

@R0swell5104

10 ай бұрын

It wouldn't matter as this also would be unrepresentative of the uniform external pressure experienced by a sealed container at extreme depth. To do this you would need to make a sealed vessel, place it in a pressure chamber filled with water and then increase the pressure of the water.

When you hear the popping sound before the carbon fibre gives in, sounds exactly how people in the titan described it

An extremely important factor about Carbon fiber that was not included in this video (though isn't important here) is repeated/cumulative pressure cycles weakens carbon fiber, so it needs to be downgraded after each pressure cycle until it is retired permanently from further use. I know this being in the rocket business where CF helium tanks were rated for 10 full pressure excursions from zero/ambient pressure to 10000 psig and back to zero. 10X was it, the tanks end up in the scrap heap forever being retired from future service. Usually, holes drilled in them so they cannot accidently be reused.

7:45, it's over 9000 !!! 😲😲

Great experiment that answered many questions in my mind. Carbon fibre is not even as strong as aluminum but its major advantage is light weight. Also, it proved that steel as one of the oldest human discoveries is still the king of compounds when it comes to strength. Thanks for video.

@commendatore2516

10 ай бұрын

you wrote "Carbon fibre is not even as strong as aluminum" but aluminum has a strength of about 500 kilonewtons compared to carbon fiber which can have up to 1600 kilonewtons of strength

@carbonfabrik

10 ай бұрын

@@commendatore2516 beause people dont understand how cf works. In this case where hes basically pressing the fibers downwards the main force taker is the resin. However the resin only is an addition to fixate the fibers in position. The fibers should take the load, which they do best in tension directed to the fibers. Pointless comparison like this. And as you said, aluminium is not stronger than cf. It just so happens that aluminium is isotropic (takes forces the same no matter which direction) and cf is anisotropic (force taken depends on direction). A well built carbon part will outperform aluminium anyday. Yet, depending on application obviously, maybe not for a sub, but definetly for any other "normal" application like car parts etc.

2 surprises for me. 1. Aluminium stronger than brass. 2. Stainless steel stronger than titanium.

Sería genial agregar una filmación con cámara termográfica para observar los cambios de temperatura durante la compresión de los materiales.

The strength of that solid stainless pipe is just nuts! I was waiting for it to just shoot out of that press at supersonic speeds.😮💀

For those wondering about the *lack of shattering* of carbon fiber, there are 2 possibilities. 1. The height to thickness ratio of the sample was such that buckling (catastrophic failure) would not occur. Criteria based on geometry and material properties will determine if buckling or crushing.will occur. With a longer tube you will see buckling. Thanks to @josephgarrett for pointing this out. 2. Regardless of 1. the nature of a simple hydraulic press will ensure a constant velocity of the head. Otherwise known as constant displacement rate. The hydraulic fluid is pumped into the cylinder at a constant rate meaning constant downward motion after yeilding (failure point). After yeild you can see in the video that the force begins to drop, yet the downward speed is constant. So you can compress the sample by the same amount, but with less and less force. More advanced machines can control displacement and force with software but this test is incapable of applying a constant force to the tube. If there is anything I missed please let me know!

@josephgarrett3075

10 ай бұрын

I don't believe this is correct....... the reason there is not catastrophic failure (with any of the specimens) is because someone did their homework and solved for the necessary geometry/stiffness to induce crushing under compression rather than buckling (for example the J.B Johnson/Euler interaction curve).

@raboldrt

10 ай бұрын

Pressure made it heat up and delaminate? Basically melt? *the glue

@R0swell5104

10 ай бұрын

Agreed, the test is completely unrepresentative on how these materials would behave with uniform external pressure as experienced at extreme depth. To be fair to the makers of the video; it was not intended to be.

@dominictarrsailing

10 ай бұрын

fascinating! that makes a lot of sense, thank you for this comment. I guess engineers generally design structures so that any deformation is a failure, catastrophic buckling or not, staying within the safety margin established by a test like this.

@antoniobragancamartins3165

10 ай бұрын

Wrote too much for a simple concept: all kinds of fibers resist traction, not compression. Simple this way! On any pressure vessels made of any fiber, when the inner pressure is bigger than the outside pressure the fiber is under traction, but when the outside pressure is bigger than the inner pressure the fiber is under compression!

Did anyone else get recommend this video after the Titan submarine disaster?

Anyone else here doing personal research about the Titan submarine’s implosion? 😅 Can’t believe the builders opted for carbon fiber over titanium after I watched this.

@Columbus1152

10 ай бұрын

Once it started to deform, that was the end of it.

I'm amazed how different grades of steel have such variance in their strength. Thank you for the video; it was very informative.

@zes3813

3 ай бұрын

wrrg, no such hting as grade or high, low etc

"Do not repeat at home"??? Like I'm having my breakfast with my carbon fiber fork in my titanium plate.

Crazy how even Aluminum would’ve made the submarine last longer 😭💀

A high strength to weight ratio only makes sense in airplane design, but for a sub, absolute strength would be the more important feature, I'd think. Excess weight can always be countered with added buoyancy.

@leecowell8165

10 ай бұрын

The Trieste used a tank of gasoline for negative buoyancy. That's what I would do as well. The tank doesn't require a large wall thickness because gasoline weighs about 6 pounds per gallon and is not compressible but salt water weighs about 8 pounds per gallon thus you have 2 pounds of negative buoyancy for every gallon of displacement.

@kiyoshim9593

10 ай бұрын

Remember when Stockton said ohh "this is bouyancy foam it's is very expensive" and that's what happened

@enchantereddie

10 ай бұрын

Don't forget Stockton Rush was an aviation engineer. He could be possessed by these "high tech" materials and consider "traditional" materials inferior, old school, not innovating enough.

@sauronthegreat5799

10 ай бұрын

Stockton confused his submersible for an airplane. He thought he was design ing an airplane to go underwater.

@wedgie502

10 ай бұрын

@@enchantereddie Fact: there are more airplanes underwater than there are submarines in the sky. LMAO

It's incredible the quantity of good engineering videos that were floating somewhere in the web, and are becoming famaous right now with the submergible story!

@1234jokerboy

10 ай бұрын

At this rate , everyone gonna get a degree in mechanical engineering 😂😂

Crazy Hydraulic Press was way ahead of everybody.

No way!! The blue pipe looked like a body builder getting squashed 😂

Hey :) cool tests Quick note : there's a bug in the summary @ 10:40 (PVC is 1004 according to your tests, and acrylic is 1538) For those wondering about resistance / weight ratio, sorted by best ratio first, here is the summary : type - resistance - weight - ratio titanium - 9190 - 33 - 278 carbon - 2998 - 11 - 272 stainless steel - 15800 - 59 - 267 aluminium - 3840 - 20 - 192 acrylic - 1538 - 9 - 170 pvc - 1004 - 11 - 91 steel seam pipe - 4750 - 58 - 81 brass - 2568 - 45 - 57

@alcantarams

Жыл бұрын

thanks

@FunWithBits

Жыл бұрын

Thanks for the table summary. I was just thinking of doing the same and then saw yours. It's interesting that titanium, carbon, and stainless all have the roughly the same compressionc strength(under a cylendar form) per weigh.

@zethloveless7238

Жыл бұрын

So should I be glad my teeth are acrylic ?

@ivanjelenic5627

Жыл бұрын

Thank you! I wanted to know this, but was too lazy to do it.

@guilhermewilson2967

Жыл бұрын

Awesome! Another important factor that could be use to sum up in the ratio is the cost. This is one of the reasons SpaceX choosed Stainless Steel instead of Carbon Fiber at the Starship and Booster

Who is here after the sub implosion?

This aged VERY well

I didn't understand the metric, several there had the count long after they had already started to deform, in addition to the fact that the acrylic lasted longer than the pvc but was left out

As soon as I heard carbon fiber , I was flabbergasted. These were trained , highly educated men.

@MPjustaman

9 ай бұрын

Yup! same ones who tell us a man can breast feed.

@scottmatheson3346

9 ай бұрын

​@@MPjustamanno, they were rightwing libertarian dudebros, as evidenced by the fact that their idea of "diversity" was young white dudes instead of old white dudes. Please try to be less stupid next time you lie.

Weird recomendation by YT. Wonder W H Y.

@parvesh.5_357

10 ай бұрын

Because of titanic submarine

What material is the press made up of?

As someone who is really into material science I was blown away at how vastly superior titanium was. Like I knew it was better, but by that much? Holy cow!

@lauramcelhiney

9 ай бұрын

Where ya from ? 🤨

@drivemenuts3011

9 ай бұрын

The carbon was significantly thinner than the titanium.

I see a few notes about the carbon pipe, and it's also worth keeping in mind that carbon fiber materials are engineered to be strong when put under certain directional forces. The person designing a pipe wouldn't expect it to be compressed along its length, but instead pushed outwards towards its sides. So this is essentially the toughest thing you could do to this pipe.

@melihapaydn2137

Жыл бұрын

Pull strength it will behave another way yes also directions of the strands shows the structure of the force must be applied by the way carbon material used is not advanced one just lining

@SE-tc3cr

Жыл бұрын

Agreed light weight tensile strength is the benefit of carbon fibre

@danielosdinia4258

11 ай бұрын

But overall Carbon fiber is overrated especially in car industries. True it’s light but is not as strong as aluminum even!.

@whatever7659

10 ай бұрын

carbon fiber don't take compressive loads? umm you should turn on the TV and watch some F1 racecar's wishbones...

@LTBudd

10 ай бұрын

So, don't build a pressure vessel for a submersible out of carbon fiber, is that what you're saying?

So then, don't use a carbon fiber tube as a pressure hull on a submarine.

@napoliskey

10 ай бұрын

They didn't. they used a steel tube covered by Carbon Fiber and epoxy.

@thanos5220

10 ай бұрын

​@napoliskey Yeah, but if the carbon fiber still failed, it still would've been catastrophic

@napoliskey

10 ай бұрын

@@thanos5220 yeah? You know that how?

@thanos5220

10 ай бұрын

@napoliskey Cuz it ain't Christmas wrapping for show, like a present. It has a purpose, and multiple ppl who worked there said as much.

@thanos5220

10 ай бұрын

@@napoliskey And some of the interior WAS carbon fiber