Discussion Forum

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

--
Good luck
Ivar

Hi David,

I suggest you apply a moment not a point force as Ivar suggested. As an initial estimate based on beam theory the radius of curvature due to an applied moment = E*I/M.

Nagi Elabbasi
Veryst Engineering

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.

Hi

Check the Results - Data set - Right-click - cut plane nodes and related help/doc

--
Good luck
Ivar