Learning Forum

[Flatter97xD]

Hello,

I'm using 2020R1 and facing an issue while trying to mesh a zylindrical axisymmetric object for a static structural.

Normally I would use Hex Dominant, but I get an Error saying: "Mesher has failed to generate hex dominant mesh for one or more bodies. Try using a different mesh method." This is what it looks like:

[Keyur Kanade]

Please check following videos

Ansys Meshing Sizing:
https://www.youtube.com/watch?v=w4q6q8nKF3U
Please define body sizing.
Please go through help manual for more details
Regards Keyur
How to access Ansys Online Help Document
Guidelines on the Student Community

[Flatter97xD]

Thank you for your answer.
I've already checked the advanced size functions and read the manual but I just couldn't find the settings used in the tutorial, except for the growht rate. I can only choose between yes or no at adaptive sizing.
Where can I use functions like proximity and curvature? I have to set capture curvature to "yes", but how do I do this? I just cant find the option in the menu.
Regards Flatter

[Keyur Kanade]

Please use tetrahedron method.
Please check following videos

Ansys Meshing Sizing:
https://www.youtube.com/watch?v=w4q6q8nKF3U


Ansys Meshing: Meshing Methods:
https://www.youtube.com/watch?v=nEOC8rDnnRo
Regards Keyur
How to access Ansys Online Help Document
Guidelines on the Student Community

[Flatter97xD]

Thank you I watched the videos and changed some settings.
But why is Multizone not working and why do I have to use tetrahedron method? When using tetrahedron method the mesh is not as uniform as I wanted it to be. Whats the reason for that?
I deactivated adaptive sizing and lowered the growth rate, now it looks like this:
But the normal section view is still very unequal:

I want the mesh to look like this:
How do I get a working uniform mesh like this? Layered Tetrahedrons lead me to an error saying "An unknown error accured: The CAERep is corrupted."
I would be very thankful for some help.
Regards Flatter

[Keyur Kanade]

You can use body sizing for uniform mesh.
Please check sizing video.
Keyur

[Flatter97xD]

Thank you but I already did use body sizing. I guess this is the most uniform mesh I can get on this body. Face Meshing and other sized functions didn't help either.

[Flatter97xD]

Maybe I have not expressed myself clearly. I want a planar surface of elements at the location of the section plane. How do I achieve this?

[peteroznewman]

Open the geometry in SpaceClaim. Create three planes that go through the main axis and split each branch in half. Use Split Body and those three planes to make six bodies. You can also create a plane at the location you want a planar surface and split all the bodies again. On the Workbench tab, click the Share button.
Open the model in Mechanical. The mesher will have a better chance of creating a hex dominant mesh.
When using a Tet mesh, you can insert a Construction Surface into Mechanical in order to obtain results on a plane. Mechanical will interpolate within element that cross the plane to extract the correct value on each pixel in the plane. It is not necessary for every element face to be in the plane, but using the Split Body method above you will get that and won't have to create a Construction Surface.

[Flatter97xD]

Thank you so much, this was exactly what I needed, worked absolutely fine with Hex and also Tetrahedrons! I used Shared Topology to get the same properties as one body.
I already did use a construction surfuce before for plotting vector principal stress, but the vectors were'nt evenly distributed. Now they are. Now I just need to figure out how to plot the stresses on that split surface, but thats another story.

[tumulpurwar]

Hi I tried splitting body as you told in above post for my geometry(in spaceclaim), i want to mesh by hex dominant mesh solid part of my geometry model(purple color), but some parts failing still.
Any suggestions please