HYDRAULIC PRESS VS TITANIUM AND CARBON FIBER PIPE

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

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.

4:03 - Carbon Fiber 7:07 - Titanium

9:42 "IT'S OVER 9000!"

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

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.

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

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.

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.

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

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.🧐

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

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

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" 😮

Apple CEO watched this video before iPhone 15 launch 😂

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

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

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

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

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