3 ms·
It's not classed because nobody would have signed off on it with the level of testing they had done. Carbon fibre reinforced polymers don't have a defined fatig
by TazeTSchnitzel 3y ago
It's not classed because nobody would have signed off on it with the level of testing they had done. Carbon fibre reinforced polymers don't have a defined fatigue limit, so stress cycle failure can't be ruled out, and it's difficult to estimate how much a design based around that material can endure. To get certified, OceanGate would have had to do destructive endurance testing on a replica hull, but they only proved it could survive a single dive! Their more serious competitors wouldn't dare take that risk.
- quickthrower2 3y agoHaving read enough plain crash stories, first thing I though of was material fatigue. Like in the early days fan blades snapping off jet engines causing catastrophic failure after so many takeoffs. Now they have to inspect these closely in manufacturing and during maintenance cycles. Wouldn’t surprise me if they use ML now as it seemed a difficult human observation task. The stress/unstress cycle of a vessel going that deep must be immense.
- paulddraper 3y agoI recall first learning of "material fatigue" though the fictional movie No Highway in the Sky (1951) [1] [1] https://en.wikipedia.org/wiki/No_Highway_in_the_Sky https://en.wikipedia.org/wiki/No_Highway_in_the_Sky