[PSUBS-MAILIST] HDPE Sub hull…?

[Jon Wallace via Personal_Submersibles]

For an 1828mm cylinder the ABS calculators are showing 25 feet maximum 
depth.  The material properties I found were

Modulus of Elasticity: 150000psi
Yield Stress: 4000psi
Poisson Ratio: .5

Jon


On 4/24/2014 9:17 AM, Dean Cropp via Personal_Submersibles wrote:
> Hi everyone..
>
> I an still toying with two designs of PSUB, one larger, steel and with 
> an AUX diesel engine 3PAX…. But also with a smaller 2PAX more mobile 
> system and have been looking into the possibility of using HDPE as a 
> hull material for a small 100msw PSUB
>
> http://www.vinidex.com.au/products/pe-pipe-systems/pe-pressure-pipe/
>
> There is off the shelf (Sort of) 1000mm OD pipe here in Australia with 
> a 60mm wall thickness but I have also come across a 1360mm-OD and 
> 1650mm-OD pipe again with 60mm wall thickness that may be available. 
> HDPE can be welded, drilled and tapped quite well and using 
> fittings/penatrators made of delrin with o'ring seals has worked well 
> on some camera housings I have made.
>
> Has anyone looked further into this? is the wall thickness enough to 
> just have bulkheads instead of stiffeners? no corrosion problems and 
> it is super slippy in the water!
>
> I have always looked at having HDPE battery pods, what not the whole sub?
>
>
> Dean Cropp
>
> ~ Underwater DOP ~ Ocean Wrangler ~
> Sydney : Australia
>
> p: 0416287833  (Int p: +61 416 287 833)
> e: croppycam at bigpond.com <mailto:croppycam at bigpond.com>
> s: croppycam
> w: www.accessallangles.com <http://www.accessallangles.com>
>
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