Titanic sub CEO was on a 'predatory' mission to convince influential people to support his unsafe vessel, says expert
Titanic sub CEO was on a 'predatory' mission to convince influential people to support his unsafe vessel, says expert

Titanic sub CEO was on a 'predatory' mission to convince influential people to support his unsafe vessel, says expert

I actually have a question about this because I saw someone on YouTube speaking about this two days before the debris was discovered (the channel is Sub Brief, and they were going through all the things wrong with the vessel and how it likely imploded).
With metal/steel/other alloys (forgive me, I'm not familiar with the engineering, hence my question), when they implode, it's straight up crushed, right? Like force on a tin can.
In the video I mentioned, the guy was saying that carbon fiber doesn't crack; it's like porcelain (I think he said, or another fragile material) and it just shatters completely.
So I've been curious about something. The implosion that this submersible suffered, what would it have looked like?
If the hull just shattered under pressure, would the implosion be more like hundreds of thousands of shattered pieces ripping apart everyone rather than "crush" them in the "traditional" sense (and they'd be immediately crushed anyway by the water pressure regardless)?
Or would the implosion still present itself more or less the same as it would with a steel(?) hull?
It feels almost worse if they were, for lack of a better term, shredded. I know that it would still be instantaneous, but it feels like... I don't know, much more visceral.
From what I understand, the sub was basically two heavy titanium ends separated by a tube of carbon fiber. When the hull failed, there would have been a really brief moment where there were 5 people in a small void under tons of pressure pushing in from all sides. I'm wondering more specifically if they were crushed by the titanium ends coming together before they could have been crushed by the pressure itself.
I have done destructive strength testing on carbon fiber. It would not shatter like porcelain. Carbon fiber is made of thin, very strong but very flexible stands of carbon embedded in more brittle resin (plastic). The resin by itself probably would shatter. Carbon fiber will snap suddenly as the resin fails, but the fibers keep it from flying apart.
With steel, it would depend very much on the alloy. Some are very ductile (will bend very far without breaking) whereas some are more brittle and actually will shatter with enough force.
This video gives a good idea of how steel would compare to carbon fiber. Carbon fiber starts at 3:57 and high speed steel (a very brittle steel) at 6:19. There is no ductile steel, but 6061aluminum at 2:48 fails pretty much the same way just with a lower force.
https://youtu.be/ifOzrOgpI4g
Do you know what would have been involved here? Some kind of imaging, I assume?
Thanks for the write up!
100% with you on the value of codes and standards. I used to work in a field that was very safe except for the rare occasions on which it was very unsafe, and we all learned not only what the regulations were, but why those regulations were in place. Having the reason explained usually killed any desire I might have had to break that regulation, which of course is why the explanations were part of the training process. "Don't do this thing that is likely to lead to extremely painful injuries" or "make sure to do this thing in order to keep the very expensive machine from breaking" are rules I am delighted to follow.
I read somewhere that Rush had wanted to be an astronaut, but hadn't made the grade for some reason. I wonder if it was because he would have endangered everyone around him if he had been involved in a mission.
I believe the reason that Rush publicised was that his vision wasn't 20/20, but I suspect your point would have disqualified him later in the process anyway.