Unmatched mesh

[Anonymous]

Hi,

I have the issue that I cannot create an unmatched mesh between two parts (see screenshot). The smaller one should have 4-5 elements through its thickness. If their meshes are matching this would yield way too high mesh density in the bigger part.

I'm unsing Simulation Mechnical 2015 and it is a Static Stress with Linear Material Models scenario. I intend to use the smart 'Fine bonded to coarse mesh' feature to create the bonded pair.

Do you have any idea?

Thank you in advance,

Attila

[AstroJohnPE]

Hi Attila,

I do not remember if the mesher adjusts the mesh based on the selection of the smart bonding or not, so the first thing to try is to set the smart bonding option and remesh the model.

If that does not make a difference, then you should be able to define the contact between the parts (or between the surfaces) as "Free", mesh the model, and then change the contact type to bonded. Note that there is an option somewhere under the "Mesh > 3D Mesh Settings > Options" to match the mesh or not based on the type of contact set. That option may have something to do with your experience, too.

[Anonymous]

Hi John,

Thanks. I tried it and unfortunately it still does not work. I created a simple model to play around with (see attachments).

Any more ideas?

Thanks,

Attila

[Andrew.Sartorelli · Accepted solution]

Hi Attila,

In the latest release, Simulation Mechanical 2015 R1, there is the option to individually remesh parts in instances where an unmatched mesh is not desired or generating a match mesh prevents the model from successfully meshing. To do so you can use the following steps:

1. Suppress the smaller part in your model
2. Use "Generate 3D Mesh" on the Mesh tab of the ribbon. This will generate a mesh for the large part
3. Suppress the large part and unsuppress the small part
4. Use "Generate 3D Mesh" on the Mesh tab of the ribbon. This will generate a mesh for the small part
5. Unsuppress the large part
6. Enable smart bonding

You can read more about this procedure in the documenation for the Sim Mech 2015 R1 Release.

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[arizawilmer]

With the objective of complement Andrew answer you can watch the last video of sim Tv that is about mesh.

https://www.youtube.com/watch?v=1BIk2GhD5T4&list=UU4r-k65jeLknBBoVTtSj7Nw