apply ansol for shell163

[dovil]

Hello,

I was trying to add time history of the nodal solution of strains for Shell163 elements. Then, I got such error message:

The averaging done by the ANSOL command together with the RSYS,SOLU command assumes consistent coordinate systems for all elements used in the averaging. Shell elements aer present in the selected set which may not have consistent coordinate systems which in turn may lead to incorrectly averaged nodal results.

So, what can I do to ensure that consistent coordinate systems are active for all associated shell163 elements used by the ANSOL command?

I also tried to get the time history of the element solution for the strain values, but I got "invalid" results.

Thank you very much!

 

[lopessilva]

Hello,

There may be some problem in the mesh, in the point of nodal coordinates recognition by ANSYS. If you are importing a geometry built in a CAD program to ANSYS and then you mesh the model in ANSYS, there may be an issue on the geometry import. I would try another format. If you build the geometry in ANSYS and you are getting this error, it is a much more uncommon issue. When you build the geometry, you could have messed up with the coordinate system. Possible causes include contaminating database with boolean or overlap operation on meshed models, or defining several local coordinate system for the same points, or even an error in the coordinate input, which can in fact happen, but I don´t believe it´s the case, or you should have noticed that in the geometry plot.

I would check for the existence of local coordinate systems, which can in fact originate the coordinate unconsistency you are experiencing. If that´s the problem, define only one global coordinate system and delete the local.

I hope I have helped,


Regards,
Hugo Silva
Mechanical Eng. PhD student
Materials Eng. MSc.