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Determine Torsional stiffness/rigidity

4 REPLIES 4
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Message 1 of 5
sapayne
1776 Views, 4 Replies

Determine Torsional stiffness/rigidity

Hi

I would like to determine the torsional stiffness or a non-circular, constant cross-section part. I am trying to optimize the composition/cross section of a simple airfoil and need to examine the impact of changes to the cross section on the torsional stiffness. How can one determine torsional rigidity/stiffness?

Thanks,
Shannon

4 REPLIES 4
Message 2 of 5
AstroJohnPE
in reply to: sapayne

Could you apply a torque to twist it, and then measure or calculate the angle of twist?

Message 3 of 5
sapayne
in reply to: sapayne

This is precisely the work around I've applied. Thanks for the feedback :]

Message 4 of 5
sapayne
in reply to: AstroJohnPE

On a similar note, when applying this method to irregularly shaped torsion members, is there a simple means of precisely determining the neutral axis?

Thanks,
Shannon

Message 5 of 5
sapayne
in reply to: AstroJohnPE

Do you have a recomended means of applying pure torsion?
At the moment I have applied a torque to a selected surface, however It appears that this may be applying a torque to eash individual node and I am not certain that the part is experienceing pure torsion.

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