-Sean Phil Nuytten wrote:
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 ----- *From:* Rick & Marcia <mailto:empiricus@telus.net> *To:* personal_submersibles@psubs.org <mailto:personal_submersibles@psubs.org> *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:http://www.eng-tips.com/viewthread.cfm?qid=213295&page=4<http://www.eng-tips.com/viewthread.cfm?qid=213295&page=4>
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