Mass moment of inertia of an irregular area

[garytse86]

Main Question or Discussion Point

Hi. Please help. I'm struggling to find the mass moment of inertia of an area.

Please see picture.

I already have the centroid of the area, and the exact area.

How would I find the mass moment of inertia of this area about its centroid?

I tried using AutoCAD, but it gives you the *area* moment of inertia which isn't helpful to me?

do you guys know any programs that find the mass moment of inertia of an irregular area for you?

Thanks A LOT.

 

[mechlady]

Alibre can do that. I think Solidworks or Pro-E can too, but not sure.

 

[FredGarvin]

Pro-E and Solidworks will definitely do it. However, you could just start breaking it up into a lot of smaller parts and calculating it yourself. I would think setting a spreadsheet up wouldn't be too difficult, just time consuming.