meshing suface of solids

maysam

Why the mesh patterns for the 4 sectors of the circle are not the same? I mean it's a symmetric circle that has been cut into exactly 4 same sectors but when I use 2D auto mesh, the marked sectors meshing patterns are different than the other two and I can't make them the same! The meshed circle is part of the solid. I'm planning to drag the 2D mesh to 3D mesh the whole cylinder. Even when I use 'solid map' to directly 3D mesh the cylinder, only 2 of the adjacent sectors get the 'nice mesh'.

I'm using HM 13 and Abaqus as a solver.

 

Thanks,

Maysam

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tinh

Hi,

I cannot say the reason

switch to 'mesh style', change elem type from 'mixed' to 'quad only', change map type from 'auto decide' to 'map as circle'

click to 2 ugly surfs then click 'mesh'

 

Altair Forum User

Hi,

 

It can be because all four partitions maynot be 100% symmetry. 

 

If you want to check, you can mesh one partiotion and position the mesh on other three. 

maysam

Altair Forum User said:

Hi,

I cannot say the reason

switch to 'mesh style', change elem type from 'mixed' to 'quad only', change map type from 'auto decide' to 'map as circle'

click to 2 ugly surfs then click 'mesh'

 

 

Map as circle messed it up but map as triangle worked! No idea why!

Another question (more like a general wondering though)... why the color of small triangle showing in the middle of the 'formerly ugly' mesh is light pink and the triangle in the nice mesh is light blue? Of course both of the meshes are the same now but i wonder what the difference in color means.

Thanks,

Maysam

 

 

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Altair Forum User

 

@maysam if you know that the mesh should be symmetrical, why not work only on 1/4 of the part?

 

 

maysam

Altair Forum User said:

 

@maysam if you know that the mesh should be symmetrical, why not work only on 1/4 of the part?

 

 

 

I did start meshing the 1/4 of it but since I started from one of the 'ugly mesh' sectors, I got confused and decided to see if the rest are acting weird also or not.

I'm still confused why that happened!

Rahul Rajan_21763

For symmetric part you can use reflect command. since we use 2d automesh which is a automatic method which donot guarantees that one would get symmetric mesh output.