How to consider the rotational mass in linear elastic static analysis?

[pucho]

Thank you Francesca!

[marafini.f]

Hi pucho, sorry for the late reply.
There is actually no model in your zip folder, just a .py file
Do you want to share your .scd file?

[pucho]

Sorry, Francesca, here is the file

[marafini.f]

I had no problem running your model pucho. What's wrong about it?

[pucho]

That is the model with simple interactions with no problem. The previous model I sent you, has the convergence problem.

[marafini.f]

Ah ok,
I thought you had done some modifications following these suggestions.

so if you erase your column and run the analysis no error occurs, so I think there is something wrong with how you defined them. I would suggest you draw your geometry separately and then move it in place after you created the interaction. Moreover, you need to check for instability, are you sure you gave enough DOFs property to avoid geometric singularities?

You can try assigning properties to the zeroLength first to all DOFs, than scaling down one by one and check when it starts to fail.

Let me know how your attempts goes.
Francesca

[pucho]

Thank you, Francesca, I will proceed as you suggest and let you know.

Best regards,

Hernan

[marafini.f]

You are welcome,
Enjoy your modelling
Francesca

[pucho]

Dear Francesca,

I have another question, I am using the OrthotropicMaterial mapper and I what to know if the requested properties are in Local or Global coordinates.

Thank you very much for your answer,

Hernan

[marafini.f]

Hi Hernan,

so the Orthotropic material behaves differently if you are applying it on a 3D element or on a 2D element.
Solids handle materials in the global coordinates, while shells in local coordinates. In the instance of shells, the X-axis corresponds to the first column of the Jacobian computer in the center.

Let me know if you need anything else.
Francesca