RE: [PSUBS-MAILIST] Store Front and Product Survey

["Sean T. Stevenson" <cast55@telus.net>]

In the case of a circular window seat, the "structural requirements" would be
based on a simple beam calculation, would it not?  Design for required factor of
safety for shear and bending moment, using the worst case scenario of shear area
at minimum radius of seat (i..e window bows inward and all load is on the inside
edge of the seat), and bending moment about maximum radius of seat assuming a
point load at the minimum radius.  Also consider stress concentration at the
corner (outside radius of seat).

I'll dig through my books when I get home and see if there is any relevant info.

-Sean


Quoting irox <irox@ix.netcom.com>:

> 
> Hi Sean,
> 
> I have ASME PVHO-1-2002 here, it pretty much just reprints what's in
> the Stachiw book, although I find it a little easier reading (mmmmm,
> much shorter, bigger pictures).  But the values I'm looking for are
> listed as "selected on the basis of structural requirements".  I think
> maybe there is another pressure vessel standards (non-HO maybe?) which
> contains this information.
> 
> So, the PVHO books I have are:
> 
> ASME PVHO-1-2002: Safety Standard for Pressure Vessels for
> Human Occupancy.
> 
> and
> 
> ASME PVHO-2-2003: Safety standard for pressure vessels for
> human occupancy in-service guidelines for PVHO Acrylic Windows.
> 
> Are they any others I should add to my collection?
> 
> Cheers,
>   Ian.
> 
> -----Original Message-----
> >From: "Sean T. Stevenson" <cast55@telus.net>
> >Sent: Mar 6, 2008 6:41 PM
> >To: personal_submersibles@psubs.org
> >Subject: RE: [PSUBS-MAILIST] Store Front and Product Survey
> >
> >I don't have the book handy to check, but isn't that covered in ASME
> PVHO-1?
> >
> >-Sean
> >
> >
> >Quoting irox <irox@ix.netcom.com>:
> >
> >> 
> >> Hi Jon,
> >> 
> >> yes, I think we are talking about the same thing, the metal the
> >> acrylic is mounted in.  I am using the Stachiw book, but it has
> >> gaps in about the viewport housings/thru-hull mounts.  Things like
> >> "K is selected on the basis of structural analysis" (where K is
> >> some value I want to know), but no other information obtaining
> >> or estimating K.
> >> 
> >> I'm currently researching spherical sector viewports with a
> >> square edge.  The lip (side wall) of the viewport housing/thru-hull
> >> will take part of the pressure of the viewport, as well as the
> >> flat, contact surface.  (For flat viewports, the flat contact
> >> surface takes all the pressure and not the lip, which is
> >> just used to keep the viewport in place and for attaching the
> >> retaining ring).  I cannot find information in the Stachiw
> >> book about how thick the lip needs to be.
> >> 
> >> I plan to over build, but I'd like to know by how much I'm
> >> over building.
> >> 
> >> Cheers,
> >>   Ian.
> >
> >
> >
> >
> >
> >************************************************************************
> >************************************************************************
> >************************************************************************
> >The personal submersibles mailing list complies with the US Federal
> >CAN-SPAM Act of 2003.  Your email address appears in our database
> >because either you, or someone you know, requested you receive messages
> >from our organization.
> >
> >If you want to be removed from this mailing list simply click on the
> >link below or send a blank email message to:
> >	removeme-personal_submersibles@psubs.org
> >
> >Removal of your email address from this mailing list occurs by an
> >automated process and should be complete within five minutes of
> >our server receiving your request.
> >
> >PSUBS.ORG
> >PO Box 53
> >Weare, NH  03281
> >603-529-1100
> >************************************************************************
> >************************************************************************
> >************************************************************************
> >
> 
> 
> 
> 
> ************************************************************************
> ************************************************************************
> ************************************************************************
> The personal submersibles mailing list complies with the US Federal
> CAN-SPAM Act of 2003.  Your email address appears in our database
> because either you, or someone you know, requested you receive messages
> from our organization.
> 
> If you want to be removed from this mailing list simply click on the
> link below or send a blank email message to:
> 	removeme-personal_submersibles@psubs.org
> 
> Removal of your email address from this mailing list occurs by an
> automated process and should be complete within five minutes of
> our server receiving your request.
> 
> PSUBS.ORG
> PO Box 53
> Weare, NH  03281
> 603-529-1100
> ************************************************************************
> ************************************************************************
> ************************************************************************
> 
> 







************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
	removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.

PSUBS.ORG
PO Box 53
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************