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Remove 3D elements free edges

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I know someone has asked this topic before. However, all the solution I found did not work on my case. 


I used "edges" to find the free edges between two hex elements.  I have tried to remove it by " equivalence " and by deleting the elements and creating them again. When I checked the nodes on the two hex elements. I found that there is one shared node has two ID numbers. So I also tried to replace one ID with another ID. None all these methods worked. 


Please help me.


Thank you very much!


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Hello jacobier,


The left of the two masked (hidden) elements (yellow, Reissner's membrane) is at fault.

It's a degenerate hexa element, rather than a penta. Therefore, at this point, the nodes can not become equivalence.


Best Regards,



jacobier likes this

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