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[ANSYS Meshing] Why is Ansys Meshing getting crazy

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Old   December 8, 2016, 19:15
Default Why is Ansys Meshing getting crazy
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Kadir
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Hi everyone,

I'm new around here and I'm practising about meshing in Ansys. As I demonstrated below , there is a solid body that i'm trying to make hexahedral mesh and I couldn't succeed yet but my problem is a bit different I think.

Some places on a body that I've already meshed are changing very badly even when I dont change anthing about these bodies or another body that have contact with them. And when I undo all my changes there is no recovery on these meshes. It stays the same.

There is my solid body in the first screenshot. Its some parts were completed with simple normal mesh like demonstrated in the second one. I was trying to mesh the bottom parts but suddenly some part's meshes have changed and it didn't recover even when I supress or remove all the methods and sizings etc.

I've thought that if I try to divide the edge into only 2 parts the mesh density may go away but when I try this Mechanical gives me an error.

Plus I'm adding my geometry file. Thank you all for your interest.

https://we.tl/IyLpnCU4IV
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File Type: png 2.PNG (92.2 KB, 21 views)
File Type: png 3.PNG (60.5 KB, 16 views)
File Type: png 4.PNG (41.8 KB, 22 views)

Last edited by kadir-ek; December 9, 2016 at 07:21.
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Old   December 9, 2016, 00:53
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Quote:
Originally Posted by kadir-ek View Post
Hi everybody,

I'm new around here and I'm practising about meshing in Ansys. As I demonstrated below , there is a solid body that i'm trying to make hexahedral mesh and I couldn't succeed yet but my problem is a bit different I think.

Some places on a body that I've already meshed are changing very badly even if I dont change anthing about these bodies or another body that have contact with them. And when I undo my all changes there is no recovery on these meshes. It stays the same.

There is my solid body in the first screenshot. Its some parts was completed with simple normal mesh like demonstrated in the second one. I was trying to mesh the bottom parts but suddenly some part's meshes have changed and it didn't recover even if I supress or remove all the methods and sizings etc.

Plus I'm adding my geometry file. Thank you all for your interest

https://we.tl/IyLpnCU4IV
If bodies are within a multibody part, then their meshing order does matter. You may get different resilts depending on it. If you change meshing controls for one of such bodies, you have to regenerate mesh for all bodies in part.
This does not apply to bodies which are not combined in multibody parts.
If you want the mesher to preserve your sizing controls, use Hard option instead of Soft. But keep in mind that if hard controls are not consistent, mesher may fail.
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Old   December 9, 2016, 05:53
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Quote:
Originally Posted by kadir-ek View Post
Hi everyone,

I'm new around here and I'm practising about meshing in Ansys. As I demonstrated below , there is a solid body that i'm trying to make hexahedral mesh and I couldn't succeed yet but my problem is a bit different I think.

Some places on a body that I've already meshed are changing very badly even if I dont change anthing about these bodies or another body that have contact with them. And when I undo my all changes there is no recovery on these meshes. It stays the same.

There is my solid body in the first screenshot. Its some parts were completed with simple normal mesh like demonstrated in the second one. I was trying to mesh the bottom parts but suddenly some part's meshes have changed and it didn't recover even if I supress or remove all the methods and sizings etc.

I've thought that if I try to divide the edge into only 2 parts the mesh density may go away but when I try this Mechanical gives me an error.

Plus I'm adding my geometry file. Thank you all for your interest.

https://we.tl/IyLpnCU4IV
share iges or step file of your geometry
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Old   December 9, 2016, 07:06
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Kadir
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First of all, thanks for replies.

Quote:
Originally Posted by Antanas View Post
If bodies are within a multibody part, then their meshing order does matter. You may get different resilts depending on it. If you change meshing controls for one of such bodies, you have to regenerate mesh for all bodies in part.
This does not apply to bodies which are not combined in multibody parts.
If you want the mesher to preserve your sizing controls, use Hard option instead of Soft. But keep in mind that if hard controls are not consistent, mesher may fail.

I always choose hard but I think that's not the problem. Problem is after my mesh has broken, it stays always the same. It never gets the previous shape even when I undo all changes that I've done.


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Originally Posted by Abdullah khan View Post
share iges or step file of your geometry
I'm at work now but I'll share the mesh file when I'm back home today. Thanks
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Old   December 9, 2016, 07:55
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Quote:
Originally Posted by kadir-ek View Post
First of all, thanks for replies.




I always choose hard but I think that's not the problem. Problem is after my mesh has broken, it stays always the same. It never gets the previous shape even when I undo all changes that I've done.




I'm at work now but I'll share the mesh file when I'm back home today. Thanks
sometimes undo and redo many times we have that issue because of programming limitation of the Ansys algorithm make sure you don't save changes you made when you close the ICEM
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Old   December 10, 2016, 14:33
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Hi guys,

Sorry for late I've tried to export only the mesh file but I couldn't so I'm sending my Mechanical model. It's about 50 mb. If you could take a look when you are free it would be great

https://we.tl/Oa1JTuBtmI

Thanks
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Old   December 10, 2016, 16:38
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Guys I've found the problem. There is a wrong edge size definement because of the geometry decomposing. At first I did right but after geometry decomposing somethings have changed I think. Thank you all for your interest
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