3d meshing a very thin region of a rod
Altair EmployeeI want to 3d mesh a rod with curved profiles at both ends, but I am not able to mesh the ends of the rods properly leading to element errors which I am not able to solve. Also I want to 2d mesh a cylinder connected to the rod at one end and then link the 3d elements on rod and 2d elements on cylinder. I have attached the model file and also the images of the cross section of rod and cylinder.
Please help me with the same.
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Answers
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Hi virtro
This can be cleared by refining the mesh near the thin section. Try clearing the tet collapse near the thin section of the rod.
Then extract mid surface of the cylinder to create a 2D mesh and connect the 3D & 2D mesh using rigid elements like RBE2s or RBE3s with a layer of face elements on solid mesh.
You can refer these forum links to connect 3D mesh to 2D mesh
https://community.altair.com/community?id=community_question&sys_id=e776483a1b2bd0908017dc61ec4bcb6a
https://community.altair.com/community?id=community_question&sys_id=a896007a1b2bd0908017dc61ec4bcbfa0 -
Thank you for the reply Pranav, but I am not able to refine the elements in the thin region. Can you please show me the process?
Also I am not able to properly imprint the 3d mesh on 2d mesh of cylinder as it gives me weird results. Please help me with the same
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Hi virtro,
Perhaps you can put the 2d>mesh edit>imprint to good use. Please refer to HM help (F1) and some tips and tricks .
A similar problem was already treated:
https://community.altair.com/community?id=community_question&sys_id=733648761b2bd0908017dc61ec4bcbff0 -
Altair Forum User said:
Thank you for the reply Pranav, but I am not able to refine the elements in the thin region. Can you please show me the process?
Also I am not able to properly imprint the 3d mesh on 2d mesh of cylinder as it gives me weird results. Please help me with the same
Hi virtro
The thin edges have been refined by using a fine mesh along the region. The surface was split using Geometry > surface edit > Trim with nodes and re meshed with a smaller element size
Then the mid surface of the cylinder was extracted using Geometry > midsurface > extract, to do a 2D mesh
For connecting 3D mesh to 2D mesh, here i used a Tie contact between the face elements of the rod and cylinder
The model is attached for your reference
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