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Second Moment of Area - semicircular groove in a beam?

by Spennn
Tags: beam, groove, moment, semicircular
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Spennn
#1
Mar1-10, 10:51 AM
P: 2
Hi there guys, I've been looking into a problem that has been set as part of my Surf Science course (have your laughs I'm more than used to it! ;D) and not had much joy.

The problem that I have been having is that I can only find equations that relate to the second moment of area of I beams, Hollow cylinders etc. but, I am struggling to find anything relating to the shape that I need to investigate online or in books.

The shape I need to look at is a semicircle shaped groove in the surface of a beam.

So, I don't want to waste anybodies time, I'd just like to either know if I can relate someother shape to this or know if anybody can just point me in the right direction or let me know what I would call this shape so that I might have more luck searching myself :)

Thanks a bunch

Spen :)
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tiny-tim
#2
Mar1-10, 04:23 PM
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tiny-tim's Avatar
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Hi Spen! Welcome to PF!

Quote Quote by Spennn View Post
Hi there guys, I've been looking into a problem that has been set as part of my Surf Science course (have your laughs I'm more than used to it! ;D)
No! sounds groovy!

(I'm not sure exactly what the shape is, but anyway )

moment of area is additive, so you can find the moment of area of the groove, and then subtract that from the moment of area of the ungrooved beam.
Spennn
#3
Mar2-10, 06:18 AM
P: 2
Cheers buddy :)

Big help, now to get on with the coursework! meh!

Thanks again,

Spen


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