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TimM

Node to Node Connectivity between two parts

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Hi, I am a beginner at using HyperMesh and I need some help regarding this issue. I want to achieve Node to Node connectivity between  two seperate parts from one Assembly. 

I meshed both with Volume Tetra Mesh. I have also already found and read an older post where someone asked a similar question on how to achieve this. 

The way I interpreted it is that I have to mesh first the red Part and then I have to Project the Elements from the red part onto the gray part. The next step would then be to Volume Tetramesh the red part? 

Unfortunately I cannot get it done, everytime I try these steps there is no Node to Node connectivity. Maybe someone can give me a detailled step by step explanation so I can find what I am doing wrong. 

Here is a picture of both parts, (i have already meshed them here with volume tetra) 

 

Best regards TimM

Frage Hypermesh.JPG

Frage Hypermesh 2.JPG

Test Model.hm

Edited by TimM
Edit* I have added the model file

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hi,

i see that you have the geometry (2 solids) in your model.

and your described solution may be difficult to follow.

 

You should get the 2 solids connected before creating the mesh.

To connect the solid >> use Solid edit (geom page) >> boolean
image.thumb.png.7b6310e6a5f6dd45f81e1b3a479ded12.png

if you do it right >> change the color mode to "topology", you will see the surface between 2 solids is yellow. this is the shared surface b/w 2 solids.
next create the mesh, the nodes on this surface will be shared.
image.png.8acc9e62e77e575838c75b86a8479a47.png

image.png.335ab58f42d207e1bdc4a1344a0f7dbd.pngimage.png.1b61e966606ad3bf4b912bfd28626c68.png

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After merging solids and split again, you get something like the following (only 1/4):

20200720_000206.png.9e877d27e0a4b0e502cee409bc192ee5.png

When you have this geometry, your work is finished almost 50%!

Never make TET meshing when you can make HEX one:

20200720_000207.png.8559100de547cc0e3f3130e5b0b42ae6.png

 

HTH,

 

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Thank you so much. This helped a lot. 

 

Quote
5 hours ago, Q.Nguyen-Dai said:

Never make TET meshing when you can make HEX one:

 

Why should I always prefer Hex if it is possible? I suppose it is giving me more precise results?

 

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7 hours ago, TimM said:

Thank you so much. This helped a lot. 

 

 

for structure analysis, hexa give better accuracy with the same number of elements compare to tetra.

If you are using tetramesh for structure analysis, you should use second order tetra (tetra 10 nodes).

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