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Fatigue modeling (remember it has successfully made it to titanic prior) of a thick wall composite (non homogeneous) tube under external pressure is an extraordinarily difficult problem for the most skilled of specialists, so forgive me if I don't trust that reddit video even the tiniest bit.
I was suspicious of carbon fiber as a reasonable material when I first heard of this, and after watching a bunch of interviews with experts it is 100% confirmed. Should have been made out of good ol' fashion linear elastic metal or very thick cast acrylic.
If you gotta be fancy find some way to print it by direct deposition.
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18 Cayman GTS
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