RE: [PSUBS-MAILIST] Hemisphere Seat Formula

["Greg Cottrell" <greg@precisionplastics.com>]

Jon,

The dome shape that exerts the highest radial loading should fall somewhere
around the midpoint between a flat disc and a full hemisphere. I imagine
that the 90 degree segment exerts the peak load but I don't know how to
demonstrate that mathematically.



Greg Cottrell
Project Manager
 
 
greg@precisionplastics.com
http://www.precisionplastics.com
 
P please consider the environment before printing this email 
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Jon Wallace
Sent: Tuesday, June 14, 2011 1:19 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Hemisphere Seat Formula


No replies.  Let me try another way...those of you with hemisphere 
domes, how did you calculate the seat requirements?  I don't think total 
surface area of the dome can be used to find the total stress on the 
steel seat.

Jon


On 6/11/2011 6:11 PM, Jon Wallace wrote:
>
> Looking for info on seat design (square edges) for a hemisphere dome 
> and how much of the surface area of a hemi contributes to force 
> against the seat.
>
> Jon




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