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Area moment of inertia (2nd moment of area) calculation

Posted 4 juin 2025, 10:31 UTC−4 Geometry, Equation-Based Modeling, Material Models Version 6.3 2 Replies

Mirhan Özdemir
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Hi everyone,

I’m trying to calculate the area moment of inertia (Ixx and Iyy) for an arbitrary 2D shape. As a simple example, consider a cross-section composed of two circles—I'd like to determine the area moment of inertia for this small circle.

Since the geometry can be arbitrary in other cases, I’m looking for a general method to compute Ixx and Iyy. I’ve noticed that COMSOL (e.g., through the "mass properties" function) provide mass-related properties like mass moment of inertia, but what I need are the area moments of inertia.

If anyone has suggestions or knows how to extract these values, I’d really appreciate your help.

Best regards, Mirhan

2 Replies Last Post 5 juin 2025, 16:23 UTC−4
Edgar J. Kaiser Certified Consultant
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Posted: 6 months ago 5 juin 2025, 04:17 UTC−4

Hi,

those are integrals across the respective surface. Check the integration options in the Nonlocal Couplings.

Cheers Edgar

-------------------
Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
Hi, those are integrals across the respective surface. Check the integration options in the Nonlocal Couplings. Cheers Edgar
Mirhan Özdemir
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Posted: 6 months ago 5 juin 2025, 16:23 UTC−4

Edgar

Dear Edgar,

Thank you for the response!

I will check your method.

Best regards, Mirhan

>Edgar Dear Edgar, Thank you for the response! I will check your method. Best regards, Mirhan

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