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2d mesh using midsurface

Altair Forum User

Hello I have a question about preparing geometry to mesh. After using midsurface there is small gap between joined profiles.

1) Before meshing I need to extend vertical element to the horizontal one to have yellow lines and to have common edge?

2) If yes, how to do it if my geometry is not perfect and side surfaces of 2 profiles and not in the same plane. How can I perfectly locate 2 surfaces to each other? In my model 1 extended surface hits target surface too far and on another side miss target because of dislocation.

Help me please

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Rahul Rajan_21763

Using quick edit and surface edit one can achieve proper connectivity.Share hm file with geometry?

Altair Forum User

Thanks Rahul for reply.

I attached .hm file with my model. Some of profiles were easy extendable when they had the same width. But when the horizontal one is wider than the vertical (photo1) I can't do this. How can I adjust that dimension?

Photo 2: Is it necessary to join these 3 profiles in geometry? Or can I mesh them separately and join using for example RBE elements?

Photo 3: How to cut this sharp edge to remove fillet? What is the easiest way?

Please reply and thank you for your time

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Unable to find an attachment - read this blog

QuyNguyenDai

Before to woth with this kind of meshing, don't forget that mid-surface is NOT always the best choice. Some times it's better to work with external/internal faces.

Altair Forum User

But I was sure HyperMesh only allow to input thickness of element on both sides of element so I need to midsurface. Or there is possibility to give one side thickness? If yes, how to easy extract external faces?

QuyNguyenDai

If you work with external/internal faces, you can define 'offset' for your shell.

Create new component
Organize => surf => Select solid surfaces => copy

Altair Forum User

Unfortunately I tried this, but in my case it doesn't matter if I choose midsurface or external surface. Profiles don't target perfectly each other. There is smaller gap but anyway it is. So please reply on my previous question question about joining (welding) (photo2) 3 profiles side to side. Keep this gap and join elements in mesh on edges or any other idea?