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Remove 3D elements free edges

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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Pranav Hari

Hi jacobier

The Edges panel functionality applies only for 2D shell elements

<?xml version="1.0" encoding="UTF-8"?>

Similar connectivity check for 3D elements can be done only in faces panel ( Tools > faces )

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

So does it mean that I don't need to worry about the free edge for my case?

Altair Forum User

Actually when I used 'face' function. I found a face between the two elements. 'Equivelance' did not work as well.

tinh

Could you show a photo?

I checked your file but don't see it

Altair Forum User

image.png.f37592ec87a365dec5cb99b48df1abc4.png

<?xml version="1.0" encoding="UTF-8"?>

The other edges are correct. Only these two are related to connection and should be removed.

Thank you very much!

Mario_21478

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,

Mario

Altair Forum User

Hi, Mario

Thank you very much! How can I solve this? I have tried deleting the element and manually making penta element, but the problem remained.

Mario_21478

Hello jacobier,

Delete the element and make a equivalence check (display all before).

Then you can create a new one.

Best Regards,

Mario

Altair Forum User

After I deleted the elements and displayed all, still 0 nodes were found for equivalence. Can you try that for me, as I have uploaded the model.