this post was submitted on 28 Jun 2023
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[–] axtualdave 15 points 1 year ago (5 children)

By all accounts, carbon fiber doesn't "strain". It does its thing great right up until it fails catastrophically.

[–] Pakyul 5 points 1 year ago

Which is why they used acoustic sensors to monitor the carbon fiber's integrity instead of strain gauges. They absolutely would have had warning.

[–] guyman 2 points 1 year ago (1 children)

Was the hull made purely of carbon fiber?

[–] wazoobonkerbrain 1 points 1 year ago (1 children)

The hull consisted of a carbon fiber tube with titanium endcaps, one of which served as a door (which could not be opened from inside) and contained the porthole.

[–] Sleepy 5 points 1 year ago (3 children)

I watched this that shows the making of the hull. So it seems that it's carbon fibre over a metal cylinder. I don't know if that cylinder is titanium but it doesn't seem like the hull was pure carbon fibre. That cylinder is nowhere near thick enough for anything but the base for the carbon fibre though so it's not like it would offer anything but squish in an emergency. But I did find this very interesting (and terrifying somehow):

https://youtu.be/4O5F4ZVlIac?t=660

[–] wazoobonkerbrain 1 points 1 year ago

Hmmm.... still not sure....

The Titan Tragedy—A Deep Dive Into Carbon Fiber, Used for the First Time in a Submersible

OceanGate shows a metal tube around which the carbon fiber filament is wound but it may be a mandril removed after hardening of the composite.

[–] wazoobonkerbrain 1 points 1 year ago

The tube section was carbon fiber only, no metal. The endcaps were titanium. Many thanks for the link, I will take a look!

[–] wazoobonkerbrain 0 points 1 year ago

I'll be damned, you're right, the carbon fiber was wound around a metal tube. My bad.

[–] wazoobonkerbrain 1 points 1 year ago

The Cameron interview implied that the occupants saw signs of trouble. What form those signs took was not specified.

[–] wazoobonkerbrain 1 points 1 year ago

The Titan Tragedy—A Deep Dive Into Carbon Fiber, Used for the First Time in a Submersible

*No hull monitoring system was needed during a April 2019 dive when Karl Stanley, submersible expert, took the Titan to 12,000 ft off the coast of the Bahamas. Stanley heard a cracking noise and urged Rush to cancel that summer’s dives to see the Titanic, reported the New York Times. *

[–] guyman 1 points 1 year ago (1 children)

Was the hull made purely of carbon fiber?

[–] vimdiesel 1 points 1 year ago

No end caps were titanium alloy and the port was glass of course