Posted on 09/17/2024 9:09:44 PM PDT by Red Badger
The only one I really feel sorry for was the 19-year-old kid.
He didn’t want to go in the first place, but since it was Father’s Day he wanted to please his dad.................
Military submarines aren’t made out of carbon fiber......there a reason for that.
I imagine the stress fracture point for carbon fiber is waaaay low.................
I think the whole problem is carbon fiber is TOO rigid.....and I suspect proper inspections weren’t being done between dives.
Where I used to work we had a whole department that used multiple processes dedicated to inspecting parts for cracks and flaws. I doubt anything like that was being done.
How do you do NDT of Carbon Fiber?
X-ray?.....................
“advanced NDT techniques such as ultrasonic testing of carbon fiber allow analysts to detect internal cracking and other indications on a volumetric level, while eddy current testing can conform to the thin profiles of carbon fiber on a surface and subsurface level.”
The vid I saw of the hull being built was using a simple lay-up technique.
Monocoqued carbon fiber using heat and pressure to activate the resin results in extremely strong assemblies.
I’ve broken lots of laid-up carbon windsurfing and biking equipment. It all stopped when it started to come as a heat and pressure molded assemblies.
Out of date carbon fiber from Boeing?!?
Yeah, THATS THE TICKET!
Carbon fiber is strong in tension, weak in compression.
Using it in a pressurized aircraft, such as a Boeing 787, is playing to its strengths.
Using it in a submarine hull, exposed to EXTERNAL pressure, where it is weakest, is just foolish.
Using “expired” fiber for a critical manned structure, strikes me as being criminally negligent.
The photo shows that the bubble-like transparent window in the bow of the submersible is missing. I suspect that a structural failure began in the seam of the bubble, possibly causing a crack in the window that resulted in a catastrophic implosion within a few milliseconds.
12,500 ft/ 33 = 378.79 atmospheres, almost four times the surface pressure of Venus.
Mercifully, death would have been within a millisecond for the passengers.
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I agree, they didn’t feel a thing.
The window manufacturer would not guarantee the window’s integrity at the depth that they were using it, but they used it anyway........................
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