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Problems with a Geometry

Posted by Maximilian Busch at October 15. 2012

Hello together,

I have a problem with a Geometrie. I have to make a static analysis on a given geometry. This geometry comes in the format STEP. After fusing and gluing the Part to one Shape, I can mesh it.

Now I want to analys it with CalculiX, but there are regions with elements very small an deformed elements. They are the reason of the errors I get from the solver (nonpositive Jacobian determinant).

I think the main problem is the tangential transition shown in the picture.

Now my question is, how can I solve the problem in the geometry by salome.

I tested same shape processing options, but I can't solve the problem.

Thanks for answers

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Re: Problems with a Geometry

Posted by Maximilian Busch at October 15. 2012

And another picture!

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Re: Problems with a Geometry

Posted by Saint Michael at October 15. 2012

Hello Maximilian

Since it's rather difficult to heal your geometry in GEOM module, the best solution is to fix your mesh by merging too close nodes (menu Modification / Transformation / Merge Modes ). If automatic mode does not provide what you need, you can manually setup nodes to merge.

St. Michael

Re: Problems with a Geometry

Posted by Maximilian Busch at October 15. 2012

Thanks a lot for that hint, it works great!!!

Re: Problems with a Geometry

Posted by Maximilian Busch at October 25. 2012

Now there is another Problem, I have elements in my geometry that look like they only be a line, like lens-shaped. With the tool merge nodes I can't win this challenge. Are there other great working tools in Salome to manage this Problem?

Thanks a lot

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