theconrodkid
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| posted on 21/9/02 at 05:48 PM |
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tube size
Ok chaps,so a 1" square tube has a strength or resistance to bending of 1 unit,what is the strength in units of 1 1/2" or2" tube
of the same gauge?
no wild gueses please
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chrisg
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| posted on 21/9/02 at 08:05 PM |
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Um........one
No... 1,245,634,334
Er.....twelvety!!!!
(Wild enough for you john?)
I don't know BTW.
Cheers
Chris
Note to all: I really don't know when to leave well alone. I tried to get clever with the mods, then when they gave me a lifeline to see the
error of my ways, I tried to incite more trouble via u2u. So now I'm banned, never to return again. They should have done it years ago!
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theconrodkid
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| posted on 21/9/02 at 08:21 PM |
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I guessed that 
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stephen_gusterson
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| posted on 21/9/02 at 10:19 PM |
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quote:
Ok chaps,so a 1" square tube has a strength or resistance to bending of 1 unit,what is the strength in units of 1 1/2" or2" tube
of the same gauge?
no wild gueses please
if it were that simple, i guess there woulnt be such stuff as 'finite stress analysis'.
atb
steve
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theconrodkid
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| posted on 21/9/02 at 11:35 PM |
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can you use finite stress to power infinite improbibility drives?i know the answer to that its 42
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Peteff
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| posted on 22/9/02 at 11:05 AM |
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You want some vallium filled tubing then you won't get any stress. As for the infinite probability drive, I bought a time machine next week to check
it out and it only exists in parallel universes. The time machine broke down next tuesday so I'm stuck for a day or two.
yours, Pete
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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theconrodkid
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| posted on 22/9/02 at 11:19 AM |
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Dont you just hate it when that happens 
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Alan B
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| posted on 22/9/02 at 12:46 PM |
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OK, first let's not confuse strength with "resistance to bending" they are different things. A material's ability to resist bending is a function
of a material property (youngs modulus) and a geometric property (moment of inertia). We are talking about the same material and doing a comparison so
we can ignore factor one.
For a square tube (ignoring the radiussed corners) the formula for moment of inertia (let's call it "I" and not go into any more detail )
I equals:
A to the power 4 - B to the power 4, all divided by 12
(A = the ouside dimn. B = the inside dimn.)
But the 12 is constant so we can ignore that too for comparison.
So for 1" x say 1/16"WT we have
0.414 units (again, forget what they are)
and 1.5" x 1/16"WT we have
1.488 units
and 2" x 1/16"WT we have
3.640
So compared to 1"
1.5" = 3.5 times better
2" = 8.79 times better
Hope that helps
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interestedparty
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| posted on 22/9/02 at 02:15 PM |
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Was that a guess, Alan?
John
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
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Peteff
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| posted on 22/9/02 at 04:02 PM |
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As quoted by Homer, " Bah, You can prove anything with facts ".
yours, Pete.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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theconrodkid
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| posted on 22/9/02 at 05:15 PM |
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Thanks Alan,at least we have someone who knows what their doin!the rest of you had better go back to school,see ya there!
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chrisg
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| posted on 22/9/02 at 06:00 PM |
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Not Twelvety then? Oh right.
Good of you to take time off from the Virus wars to give us the benefit Alan!!
(leave 'em to it, mate)
Cheers
Chris
Note to all: I really don't know when to leave well alone. I tried to get clever with the mods, then when they gave me a lifeline to see the
error of my ways, I tried to incite more trouble via u2u. So now I'm banned, never to return again. They should have done it years ago!
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stephen_gusterson
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| posted on 22/9/02 at 06:40 PM |
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quote:
Not Twelvety then? Oh right.
Good of you to take time off from the Virus wars to give us the benefit Alan!!
(leave 'em to it, mate)
Cheers
Chris
just looked on tol after a couple weeks.
what a really trivial argument.
That graeme guy seems a bit short tempered in a lot of his posts over the 2 years ive been on that list.
Nice to know riots can still start up on there without me
Old minicountryman1961 has been real quiet lately
atb
steve
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MrFluffy
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| posted on 22/9/02 at 07:41 PM |
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Talking of youngs modulus, time to insert appropriately cheesy engineering joke :-
Two cats sliding down a tin roof, which one hits the floor first? the one with the lowest mu of course...
(apologies no funny u symbol..)
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Alan B
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| posted on 22/9/02 at 09:48 PM |
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quote:
....
Good of you to take time off from the Virus wars to give us the benefit Alan!!
(leave 'em to it, mate)
Cheers
Chris
You noticed me flexing my moderator muscles eh?
I wanted to say "shut the f**k up", but it's not very diplomatic
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john_s
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| posted on 22/9/02 at 10:09 PM |
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quote:
I wanted to say "shut the f**k up", but it's not very diplomatic
No, but it can be very effective!
John
--
John Singleton
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