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For my new KLH-500 submersible configuration
evaluation I've run CosmosWork FEA software on this thick acrylic conning tow
addition, to see what options I have design wise.
The general operating depth is 500 fsw
At that depth the pressure is 222.7273
psi
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I've now found documents that show yield strength of
the material is the FOS data I need to use.
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This run was done using the material properties for
Acrylite GP.
Next I'll run Polycast cell cast acrylic, and
Plexiglas GP.
This assembly starts out by meshing it with a very
small mesh of 0.88456266 Global Size,
and 0.044228133 Tolerance. ----------------------------------------------------------------------------------------------------------------------------------------------------
To Yield Strength FOS is 5.41438 x 500 fsw = 2,707.19 fsw To Ultimate/Tensile Strength FOS is 3.00799 x 500 fsw = 1,503.995 fsw These are for the parts being in 30 degree F water. --------------------------------------------------------------------------------------------------------------------
To Yield Strength FOS is 6.02015 x 500 fsw
= 3,010.075 fsw
To Ultimate/Tensile Strength FOS is 3.34453 x 500 fsw = 1,672.265 fsw These are for the parts being in 70 degree F water. ---------------------------------------------------------------------------------------------------------------------------
I added 4" thick steel plates to the top and bottom of the acrylic
cylinder, so I could apply the same pressure to there exterior surface, to
better replicate the forces that will act upon this part.
Here are the images of the test.
In this image you can see if I change the settings, I can replicate the
look you see many times in Stachiw's book on acrylics.
As usual the inside corners get the most stress applied to
them.
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"The folly of mistaking a paradox for a discovery, a metaphor for a proof, a torrent of verbiage for a spring of capital truths, and oneself for an oracle, is inborn in us."
~ Paul Valery
Regards
Szybowski |
