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Location:
Montrose, VIC
Registered:
May 2002
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Question for maths buffs out there (are there any??)
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Sun, 03 October 2004 02:48
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I'm trying to work out the amount of force exerted on an O ring sealing something. Basically, I want to find a formula for the surface area of a toroidal ring - has someone got a book on fluid mechanics, etc. that's better than the one I've got? 
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Question for maths buffs out there (are there any??)
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Sun, 03 October 2004 04:04
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Yeah, had a think about it over lunch - it's basically just the surface area of a cylinder the diameter and length of the O ring /2 - thanks anyway! (amazing what lacking food can do to the mind, in'it..)
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Location:
Brisbane
Registered:
October 2002
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Re: Question for maths buffs out there (are there any??)
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Sun, 03 October 2004 05:24
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| draven wrote on Sun, 03 October 2004 13:31 |
(Pi.R1^2) - (Pi.R2^2)
if I understand the question correctly.... that's SA for 1 face. if you want total 3d SA, that's 2x the above, + Pi.2.R1.T + Pi.2.R2.T where T is the thickness
edit: Just finished my coffee and realised what an O-ring looks like, thus my formula being useless (but I like the way it looks)
for an o-ring, it'll be (Pi.R1.2).(Pi.R2^2), where R1 is radius from centre of o-ring to middle of the rubber, and R2 is radius of the actual rubber piece.
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thats what i'd have said 
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: Question for maths buffs out there (are there any??)
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Sun, 03 October 2004 05:36
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pick the person who was silly enough to do maths for a little while at uni and actually be good at it 
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Location:
South Australia
Registered:
July 2002
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Re: Question for maths buffs out there (are there any??)
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Sun, 03 October 2004 12:34
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what book on fluid mechanics have you got and what kind of problem are you solving???
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Location:
Montrose, VIC
Registered:
May 2002
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Re: Question for maths buffs out there (are there any??)
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Sun, 03 October 2004 13:00
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Must say I'm impressed that I actually recieved a few replies for this - there must still be a few people that use this site that occasionally use their head
Anyway, that was the easy part - the difficult part is knowing the REST of the problem, which may end up involving cutting an expensive part in half.
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Location:
South Australia
Registered:
July 2002
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Re: Question for maths buffs out there (are there any??)
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Sun, 03 October 2004 14:51
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hey you didn't answer my question
I've done a fair bit of third year fluid mechanics so I may or may not be able to help you out (I must admit, I do suck at it a little)
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