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dilen

how to ensure matching nodes for two parts in contact

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Hi,


 


I have two 3D parts in contact. I want to ensure matching nodes between the parts so that the contact is good in FE. How do I do that please. I am using tet elements.


 


Thanks


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Hi,

Let say you have two circular plates lying on one another. Mesh the first plate then translate or reflect same mesh to other plate.

Translate and Reflect would help you to get same pattern.

Regards

Rahul R

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My parts are like this. The red one is hollow inside  (with a thickness) and the yellow one fit inside. How will the mesh share similar nodes if I mesh them seperately with the same element size?


post-33908-0-21395900-1434367372_thumb.g

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Hi,

In such cases you could use red coloured component internal faces mesh.There are many options like translate,project,scale or morphing technique would help you to get same mesh.

If possible could you share your model.after that we can suggest exact way to get desired output.

Regards

Rahul R

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Here's my suggestion:


  1. Separate the component "l5cort" into two components: internal & external
  2. With "l5cort_int" & "l5cort_ext" you can mesh the 1st volume "m_l5cort_TET"
  3. With "l5cort_int" you can mesh the 2nd volume "m_l5trab_TET"
  4. Goto page "3D" => "detach" then select "m_i5trab_TET" to detach them from the 1st

Now you got two volume mesh with coincident nodes at contact surface.


See my screenshot.


 


HTH,


 


Update: here's your HM model modified.


post-889-0-04228400-1434427660_thumb.png

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@dilen: from your HM model, I make directly 3D TET mesh from your surface mesh without any modification. It should work.


If you have bad quality element, it's another history :)


You can also refine your surface mesh.


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I have managed to do it using the same method earlier but this time it worked. Don't know why.


One last thing, how would you ensure matching node between these entitoes, please?


 


 


 


 


post-33908-0-00467400-1434636887_thumb.g

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Hi,

Split surfaces where both the faces are mating. Then mesh one face and duplicate it to new component then using detach command you vcan ensure node matching.

Regards

Rahul R

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I tried the imprint options but the nodes on each part are not matching.


I'm not sure how to go about splitting surfaces using one part as the cutting tool. Any advcie please?


 


Thanks


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Hi Dai,


 


I have a similar question about the connectivity issue of the tetrahedral element of two bodies. I am trying to mesh an assembly, in which, one body penetrates into another body. I want to mesh them using 3D tetrahedral element. I first mesh the outer body and then mesh the other body which penetrates the first body. I chose the option "match existing mesh". However, the nodes of elements of thees two bodies do not connect with each other. I read your post and download the .hm file you created. But I can't figure out how did you separate the one component into two components and what is the purpose of this. Below is the link of my .hm file. Could you please show me detailed step for meshing my model? 


 


https://www.dropbox.com/s/gqd9sx4wq5nfnpl/mesh2.hm?dl=0


 


Thank you very much


 


Youyi


 


 




Here's my suggestion:


  1. Separate the component "l5cort" into two components: internal & external
  2. With "l5cort_int" & "l5cort_ext" you can mesh the 1st volume "m_l5cort_TET"
  3. With "l5cort_int" you can mesh the 2nd volume "m_l5trab_TET"
  4. Goto page "3D" => "detach" then select "m_i5trab_TET" to detach them from the 1st

Now you got two volume mesh with coincident nodes at contact surface.


See my screenshot.


 


HTH,


 


Update: here's your HM model modified.



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Hi Dai,

 

I have a similar question about the connectivity issue of the tetrahedral element of two bodies. I am trying to mesh an assembly, in which, one body penetrates into another body. I want to mesh them using 3D tetrahedral element. I first mesh the outer body and then mesh the other body which penetrates the first body. I chose the option "match existing mesh". However, the nodes of elements of thees two bodies do not connect with each other. I read your post and download the .hm file you created. But I can't figure out how did you separate the one component into two components and what is the purpose of this. Below is the link of my .hm file. Could you please show me detailed step for meshing my model? 

 

https://www.dropbox.com/s/gqd9sx4wq5nfnpl/mesh2.hm?dl=0

 

Thank you very much

 

Youyi

Hi Youyi,

Here's my test for your mesh (see HM model & screenshot).

Firstly, you have to work for "skin" meshes.

I use "Skin_1" & "Skin_2" to make solid mesh "m_ReadandWriteElement_NiCoFe"

Then, I used "Skin_1" & "Skin_3" to make solid mesh "m_Coil1_Cu_double". You can delate all Skin mesh if you not need.

 

If you want to have two separated meshes, use "3D" => "detach" with offset=0 to detach the second from the first one.

 

HTH,

mesh2_by_QNGUYENDAI.zip

post-889-0-91847500-1435504757_thumb.png

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