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Moment of intertia for corrugated pipes 
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#1
Mar412, 10:58 PM

P: 2

Hi,
I am struggling to find forumula for Moment of Inertia for corrugated hollow pipes somewhat as shown in the picture. Main Pipe is made of Solid wall construction over which smaller diameter hollow plastic pipe is spairally welded. Any approximate calculations will also help. Thanks, Aktan 


#2
Mar512, 10:35 AM

Sci Advisor
PF Gold
P: 2,241

That's a bellows that's designed to be flexible, why do you want a MOI for it?



#3
Mar612, 06:13 AM

P: 2

Thanks 


#4
Mar1812, 05:47 AM

P: 17

Moment of intertia for corrugated pipes
Normally you'd just calculate the a unit moment of inertia, in^4/in and depending on how perfect you want the value, you either approximate it as the inner tube if it is a simple pipe with the corrugations applied to the outside as stiffeners, and use parallel axis theory to combine. Most commerically produced pipe have tables published with all this data.
http://www.dot.ca.gov/hq/esc/techpub.../section12.pdf 


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