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RE: [PSUBS-MAILIST] hull thickness technicial help needed



Somewhere in the psubs archives (under one of the conventions), there is an ABS spreadsheet for performing this calculation on metallic cylindrical pressure vessels.

It is quite comprehensive in it's analysis, however FRP, unlike steel, concrete, and even wood, seems to have less history, and available data in its use for 1 atm pressure vessels. If memory serves me correctly, the Busby manual references one as a shallow water test bed.

FRP, is a fabulous material for ambient subs for all the playing around you could do in complex shapes as demonstrated by http://exomos.com/exomos_main_content.html

When I finish my marine studies, I will look at using FRP for designs along the lines of my original concept http://www.frappr.com/psub

Joe

From: DrewBane1@aol.com
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] hull thickness technicial help needed
Date: Tue, 17 Oct 2006 15:35:01 EDT

I have the technical spec's on a 1/4" laminate using conventional lay up...
Is there anyone out there that can derive from this tech info a safe depth for
a  frp submersible?
resin  type                            411            8084
flexural strength  psi               29,600      39,0000
flexural modulus x10>5psi      10.3          12.7
tensile strength  psi                 20,700      31,500
tensile modulus  x10>5psi       17.4          14.4






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