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Hi, Phil - yeah, I should have mentioned that in my post. You had
responded some time ago about exactly that.
I'd like the PC for my ambient (for collision), but, if I remember
correctly you had also mentioned that, aside from the flow characteristics,
acrylic had been studied to exhaustion, so the failures were well
documented.
I have a life-support question but I'll post it under the proper subject
heading.
Rick
----- Original Message -----
Sent: Wednesday, October 21, 2009 10:34
PM
Subject: Re: [PSUBS-MAILIST]
canopy/bubble forming
Rick: Note that the link was on the blowing of polycarbonates -
Might want to think about the 'cold-flow' characterisrics of PC - that
what allows it to 'absorb' incredible levels of point loading that would
shatter acrylics like plexi-G - the material attempts to flow away from
the impact and dissipates the energy in that fashion. This same ability will
cause it to creep easily and deform under a continously applied load such
as that induced by external pressure. That's why you don't see Lexan
view ports or domes used in a chambers or vessels with significant pressure
differentials.
----- Original Message -----
Sent: Wednesday, October 21, 2009 10:58
AM
Subject: Re: [PSUBS-MAILIST]
canopy/bubble forming
This is an excellent link for anyone wanting to form their own canopies
or bubbles:
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