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49

i'm no submarine expert, but...

submitted by mikenigger to whatever 2.0 yearsJun 24, 2023 02:56:14 ago (+50/-1)     (files.catbox.moe)

https://files.catbox.moe/owau9n.png



31 comments block

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[ - ] kammmmak 0 points 2.0 yearsJun 24, 2023 10:34:53 ago (+0/-0)*

This passed as a solution 😳

[ - ] MasklessTheGreat 0 points 2.0 yearsJun 24, 2023 11:26:59 ago (+0/-0)

It’s even better when you consider where they ran the wires for the light up RV handles. It’s definitely a clean install.

[ - ] allAheadFull 0 points 2.0 yearsJun 24, 2023 15:16:44 ago (+0/-0)

Possibly but it's super cold down there and you need insulation in those subs. It could be carbon fiber but it's not likely load bearing hull.

The sub had been inspected by a third party earlier and due to repeated hull stress was only rated to go down to 9,500 feet, the Titanic is around 12,500 feet. This is another case of a liberal mind ignoring reality and going with their gut.

[ - ] bonghits4jeebus 0 points 2.0 yearsJun 24, 2023 21:03:41 ago (+0/-0)

The internet said you can do it; you just have to be careful about it. But I "know nothing" about carbon fiber. Granted these videos were for automotive application.

[ - ] dulcima 1 point 2.0 yearsJun 24, 2023 07:48:06 ago (+1/-0)

Looks like DIY weekend project.

[ - ] mikenigger [op] 1 point 2.0 yearsJun 24, 2023 07:52:53 ago (+1/-0)

the hull was made with expired pre-preg

[ - ] deleted 1 point 2.0 yearsJun 24, 2023 10:16:26 ago (+1/-0)

deleted

[ - ] bonghits4jeebus 1 point 2.0 yearsJun 24, 2023 21:10:59 ago (+1/-0)

Apparently the cylinder part of the sub is carbon fiber, and the endcaps are titanium.

[ - ] NukeAmerica 2 points 2.0 yearsJun 24, 2023 05:20:53 ago (+2/-0)

Thats not inlay walls for wiring and such?

[ - ] PotatoWhisperer2 4 points 2.0 yearsJun 24, 2023 06:50:02 ago (+4/-0)

Seagoing ships don't tend to hide such things. Makes it very difficult to find/repair issues when out at sea.

[ - ] RepublicanNerd 2 points 2.0 yearsJun 24, 2023 05:32:00 ago (+2/-0)

Thats the hull, wiring goes underneath the false floor. You can see monitor cables heading down.

[ - ] HeavyBrain 2 points 2.0 yearsJun 24, 2023 06:38:26 ago (+2/-0)

All of this is very inspiring, inspiring to get a decent engineering degree.

[ - ] localsal 3 points 2.0 yearsJun 24, 2023 11:19:29 ago (+4/-1)

Yes, this was a poor design.

But the Titan did spend at least 60 hours at 4000m over the course of many dives before imploding.

The bigger issue is not the design itself - it's the mentality that "if it survived once, it will survive again". That is generally true for metals that are stressed in the elastic region, but carbon fiber is a different beast altogether.

Carbon fiber has very complex yield curves, and does not react well to the ocean under stress. This is probably the biggest engineering mistake, and each dive brought it closer to disaster, no matter what other engineering decisions were made.

[ - ] aekotra 1 point 2.0 yearsJun 24, 2023 12:36:05 ago (+1/-0)

"The bigger issue is not the design itself"

Sitting imploded on the ocean floor after less than 30 pressure cycles at 4000m

PRETTY SURE IT WAS THE DESIGN BRUV

[ - ] localsal 0 points 2.0 yearsJun 24, 2023 16:03:07 ago (+0/-0)

LMAO. Did you read what I wrote?

First, if the "design" was bad, it wouldn't have survived a single dive to depth, right?

Critical thought is not your strong point, is it.

[ - ] KangzNSheeit 1 point 2.0 yearsJun 24, 2023 19:40:36 ago (+1/-0)

So if a car survives one trip to the store, it's a good design even if it bursts into flames killing a family of 5 the next time it goes?

[ - ] localsal 0 points 2.0 yearsJun 24, 2023 20:31:06 ago (+0/-0)

I never said it was a "good" design. Nobody knows how to read anymore.

I said the bigger issue is a "past performance predicts future performance" mindset. This is why there was no followup non-destructive testing after repeated dives to 4000 meters in an unproven carbon fiber hull.

Retards need to learn to read.

[ - ] aekotra 1 point 2.0 yearsJun 24, 2023 22:52:00 ago (+1/-0)

First, if the "design" was bad, it wouldn't have survived a single dive to depth, right?

Lmao, truly retarded. I suggest you look up how laminates like carbon fibre fail. The progressively delaminate. It's an incremental failure. Yes, designs that fail quickly are BAD DESIGNS. Just because it didn't implode on it's first dive you think it's good? Lmao what a complete moron.

[ - ] localsal 0 points 2.0 yearsJun 25, 2023 11:11:26 ago (+0/-0)

LMAO at you again.

Go back and read my comment, I specifically talk about everything you say.

We know that carbon fiber will degrade and needs to be derated, but the engineering team - probably led by the CEO - decided/assumed that would never happen, or at least at a slow enough rate to never need testing. That mindset is way more dangerous than any design in any engineering environment.

I don't know what you are trying to argue about.

All the retards on here thinking I said it was a "good" design for some reason too - because they have no reading comprehension. Read my first sentence.

[ - ] happytoes 0 points 2.0 yearsJun 24, 2023 12:51:37 ago (+0/-0)

The fatigue limit or endurance limit is the stress level below which an infinite number of loading cycles can be applied to a material without causing fatigue failure.[1] Some metals such as ferrous alloys and titanium alloys have a distinct limit, whereas others such as aluminium and copper do not and will eventually fail even from small stress amplitudes.

From wikipedia but it still might be true :-)

TIL why titanium is a popular choice for building submarines.

[ - ] localsal 1 point 2.0 yearsJun 24, 2023 16:12:15 ago (+1/-0)

If you overlay the stress strain curve onto the "fatigue limit" curve, you will see that being in the "elastic region" that I mentioned in my comment is almost always below the stress level to induce fatigue.

Your comment has no relation to mine because fatigue only occurs once the stress hits at the maximum end of the elastic region or just beyond it.

No military submarine has ever been designed to ever get close to the fatigue limit - and most are made out of steel. And these subs can do many cycles from the surface to max operating depth in a day. Thus, the elastic region.

Carbon fiber, as I mentioned, is too complex to be able to predict the elastic region and any fatigue limits, especially when exposed to corrosive environments like ocean water at 4000 meters depth.

I have heard stories (never seen one) where a carbon fiber bike frame will shatter due to some weird angled impact.

[ - ] BulletStopper 4 points 2.0 yearsJun 24, 2023 05:04:21 ago (+4/-0)*

Dear sweet Auntie Petunia. Words fail. Somebody tell me that's NOT the pressure hull. If it is, that is some nigger-level engineering right there.

[ - ] mikenigger [op] 4 points 2.0 yearsJun 24, 2023 05:51:54 ago (+4/-0)

that definitely looks like carbon fiber and i don't see a reason why they would make another separate wall out of carbon just to drive wood screws into it

[ - ] BulletStopper 0 points 2.0 yearsJun 24, 2023 05:57:37 ago (+0/-0)

Was kinda hoping that someone had gotten a link to the design drawing/specs and that I was mistaken.

[ - ] NedsHead 4 points 2.0 yearsJun 24, 2023 07:23:13 ago (+4/-0)

Speed holes, they help you experience the Titanic faster

[ - ] JudyStroyer 5 points 2.0 yearsJun 24, 2023 08:29:25 ago (+5/-0)

Fucking retards could have epoxied a mounting board to the carbon fiber...

Also- my new response when my wife says retarded shit- "that's why subs built by women implode..."

[ - ] con77 7 points 2.0 yearsJun 24, 2023 05:08:41 ago (+7/-0)

Diversity hires

[ - ] Scyber 9 points 2.0 yearsJun 24, 2023 07:41:59 ago (+9/-0)

They were screwed from the start.

[ - ] TheNoticing 2 points 2.0 yearsJun 24, 2023 14:47:18 ago (+2/-0)

Someone screwed up down there.

[ - ] Hoobeejoo 10 points 2.0 yearsJun 24, 2023 05:05:17 ago (+10/-0)

This just keeps getting weirder and weirder.