Discussion Forum

January 5, 2013 10:21am UTC in response to David Fyda

Re: New to COMSOL. Help with structural analysis.

Hi

If you have a tube, it's not only the diameter but also wall thicknes that should be considered, in addition to the length and the aterial parameters.

If you apply a "point" load you will get singularties, apply rather a Boundry load (surface for 3D, line for 2D but a tube is difficult to represent in 2D ;) or a Point in 1D.

Then if you want a radius of curvature you should rather apply a moment at the end and not a force, a force does not really give a regular radius of curvature.

Finally you need to define the "radius of curvature" there are some interesting threads on the FOURM try a search, somewhere one of the COMSOL employees have give a model to extract the radius of curvature for small and (?) lage deformations.

Once yo have the Radius you can define the moment (or force) as a global variable driven by the expression
(Calculated_Radius - Desire_Rradius)^2

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Good luck
Ivar

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January 7, 2013 8:34pm UTC in response to Nagi Elabbasi

Re: New to COMSOL. Help with structural analysis.

I think I managed it, but I do have a question.

In my pipe, after running the analysis, and graphing the Von Mises stresses on the entire pipe, is there anyway to cut half the pipe off so I can see the stresses on the inside of the pipe?

Thanks.

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