Re: [ATM] Bending a bar

["Donald Good" <donald.good@comcast.net>]

Richard, 
FYI The moment of inertia referred to is not the force = mass X acceleration
inertia, but a structural mechanics term that refers to the cross sectional
shape (circle, square, I beam, etc,) and the thicknesses.

And Robert:
Robert Houdart wrote:
> ...A good reference...
> 
> If you need some help with a concrete example...

He was talking about plywood, not concrete. <g>

Don

-----Original Message-----
From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On Behalf Of
Richard
Sent: Thursday, June 14, 2007 7:44 AM
To: Michael Lindner
Subject: Re: [ATM] Bending a bar

Hi Michael,

Thursday, June 14, 2007, 1:32:22 PM, you wrote:

ML> Can anyone tell me a formula for how much a (rectangular) bar will 
ML> deflect under compression?

Here's one of many many calculators you will find online if you search
Beam Bending on google :

http://www.efunda.com/formulae/solid_mechanics/beams/casestudy_display.cfm?c
ase=cantilever_uniformload

It's not clear from your ascii art if both ends or one end are fixed,
but obviously it matters. Otherwise, it's defined by the load, where
it is applied and, strangely, the moment of inertia of the section.
-- 

Best regards,
  Richard in the UK

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