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Abaqus - Mesh for a complex part

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Efstia

Structural
May 30, 2014
20
Dear all,

I would like to create a structured mesh of the rotation shaft that I have attached. However, the geometry is a bit complicated. I have created lots of partitions in order to be able to mesh it properly. The mesh change to sweep instead of structures. Is there any possibility to get your advice please?

I have attached the cae file.

Thanks,

Stath
 
 http://files.engineering.com/getfile.aspx?folder=707e19cd-6290-4f92-b97e-9ecc91fd8341&file=Rotation_shaft.cae
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Stath,

I looked at your CAE file and you have around 100 partitions. First, can you employ any of the symmetry planes and model only a portion of your part? Depending on your goals you may want to consider a couple of tied constraints or meshing with second order tets. The cylinders can easily be meshed it's really the junctions between them that are the issue. Section the junctions off first and mesh the cylinders. I hope this helps.

Rob

Rob Stupplebeen
 
Firstly I removed all redundant entities as there were odd points scattered all over that were skewing the mesh in places. Then I removed the partitions you'd made adjacent to the circular openings. These partitions should have been set to one side of the circles rather than being at the tangent radius. Then partition the whole thing using an internal face. Add some planes to partition the whole thing and to add internal faces and you get a structured mesh. Some more planes could have been added to tidy the mesh up a bit more and perhaps you could use biased seeds to get a finer mesh at junctions but as it stands the mesh is ok and there are no 'bad' elements in it. The file is attached.

 
 http://files.engineering.com/getfile.aspx?folder=4436ed57-9799-40f9-8b32-e2f70df5e924&file=Rotation_shaft-meshed.cae
Thanks Rob and Corus for your help.

Corus -- Thanks for your file. I have duplicated your partitions to obtain the separated parts and therefore get the tidy mesh using bias. However, I would like to ask how both horizontal and curved lines can pass thought from the points in the attached picture in order to get a structured mesh.

Thanks.
 
 http://files.engineering.com/getfile.aspx?folder=6a378cd4-e5b4-4e3e-b076-e15883f9fb17&file=Untitled.png
Dear Corus,

I have sorted the problem out. Thanks a lot for providing the cae file.

Regards,
Stath
 
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