[PSUBS-MAILIST] carbon fiber pressure vessel

[Alan James via Personal_Submersibles]

Hi Hank,I looked at carbon fibre a number of years ago. At the time I found that there were other fiberglass / resincombinations that were just as strong under compression. I think epoxy / e-glass is one I looked at. If you found a commercially made vessel similar to the shape of a sub, you would still have to makethrough hulls & holes for view ports that would need reinforcing. So you would need to add additionalthickness to the original structure & hope your addition bonded well. Some resins rely on chemical bonding,so any reinforcements would need to be done at the same time as the hull was layed up.Graham hawk made a fiberglass sub (I think carbon fiber) it was a pretty complex proceedure.I remember Phil saying he made something in fiberglass, possibly a Newt suit, & that it cost 5x as much tomake than if it were done in metal.Additionally it would be hard for an amateur to analize for strength. The direction of the weave & proportionof resin to cloth making a differance.Alan 

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Tuesday, September 8, 2015 3:12 AM
 Subject: [PSUBS-MAILIST] carbon fiber pressure vessel
   
There are some pretty amazing carbon fibre  pressure vessels out there.   Has anyone looked at a carbon fibre sphere as an occupant sphere.Hank
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