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Mass moment of inertia of an irregular area

  1. Mar 20, 2008 #1
    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.

    Attached Files:

  2. jcsd
  3. Mar 20, 2008 #2
    Alibre can do that. I think Solidworks or Pro-E can too, but not sure.
  4. Mar 21, 2008 #3


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    Science Advisor

    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.
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