| There's a formula for designing the strain on pressurized vessels especially when the
strength characteristics of the material used is known The thicker the material used for the vessel the more pressure It will take That's obvious & simple so far They used carbon fiber and titanium fiber probably interwoven and then glued there is a procedure for this There's also a nominal, working, and burst value after these vessels are manufactured. Basically established by testing
There was no testing on this vehicle non-destructive or destructive That was bypassed Also I believed it was planned to be a 7-in thick vessel this one for some reason was 5-in thick Two of the employees from oceangate were sued and dismissed for making issues of the safety of this vessel particularly about the thickness and particularly about the gluing process (That isn't even that strange in any industry where there is engineers)
Especially in R&D situation like this So you have a material which the mechanics of that material are not fully understood Being used to manufacture a vessel that's going to withstand unimaginable pressures because of its size every square inch of that vehicle had 4,000 per square inch on it It's of a certain configuration (shape)
Needs to be tested The other thing I would bring up is I wonder if the gasket failed they're almost at full depth
Maybe they didn't change the gasket or they change the gasket and it was of a different physical characteristics The gasket is used on the hatch which was bolted shut
The gasket surface design is very critical at that pressure also I think you can rule out fatigue because carbon fiber and titanium for that matter have really high fatigue resistance LJK |