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How to calculate Moment of inertia.

Posted Dec 2, 2015, 1:56 a.m. EST MEMS & Nanotechnology, MEMS & Piezoelectric Devices, Structural Mechanics Version 5.0 2 Replies

Gunjan Kumari
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Hi!
I need to find the moment of inertia of a cantilever beam. Anyone knows a way to calculate it? Which study we should do? Here I attached my model.

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2 Replies Last Post Dec 2, 2015, 4:53 a.m. EST
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 9 years ago Dec 2, 2015, 3:17 a.m. EST
Hi
the moment of inertia can be obtained by adding the Definition "Mass Proprieties" node and populate this with corresponding density values.

If its the polar moment (see the formulas on Wiki) you want, then you need to calculate this in the derived values, once you have at least populated the data set with a "Solve - Get initial values", and/or add the integration operators accordingly and added the moments as variables under the Definition node

--
Good luck
Ivar
Hi the moment of inertia can be obtained by adding the Definition "Mass Proprieties" node and populate this with corresponding density values. If its the polar moment (see the formulas on Wiki) you want, then you need to calculate this in the derived values, once you have at least populated the data set with a "Solve - Get initial values", and/or add the integration operators accordingly and added the moments as variables under the Definition node -- Good luck Ivar
Gunjan Kumari
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Posted: 9 years ago Dec 2, 2015, 4:53 a.m. EST
Hi Ivar,
Thanks for replying so soon but I can't get what are you saying. would you please elaborate it?
Hi Ivar, Thanks for replying so soon but I can't get what are you saying. would you please elaborate it?

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