Meshing Issue

[Anonymous]

Hello all,

I have a model with 5 individual parts. The geometry of the parts is a little complex. I have got issues with trying to mesh the model. Here are the issues that I face. Any help on these is appreciated!

1.When I try to use midplane mesh, the parts wondn't remain continuous after meshing.

2. When I use solid mesh with bridges and wedges - for a fine mesh, the model wouldn't mesh at all; for a coarse mesh, there are serious discontinuities in the meshed model.

3. When I use solid mesh with wedges, following error message appears - 

" 

fem2esh - Make esh file from fem file for a specified design scenario
Version 2018.00.00.0047-W64/X64 20-Mar-2017
Copyright (c) 2017, Autodesk, Inc. All rights reserved.

Version of fem2esh.exe : 2018.00000047
Version of dcx1-win-x64.dll : 2018.00000047
Version of femapi-win-x64.dll : 2018.00000047
Version of agsdb_ar-win-x64.dll : 2018.00000047
Version of tsx2tsy.exe : 2018.00000047

Design scenario : 2
Solver type : Linear
Start time : 2018/08/15-10:11:11

--- Get 5 active element parts in range [1, 5] from fem file
Problem in getting part 3 meshing ID:
Meshing for this part was cancelled by the user

--- 4 enabled L&C groups are defined
--- Get 40316 points defined in range [1, 40316] from fem file
Calling the Surface Topology Generator (tsx2tsy)...
tsx2tsy: Update part surface contact/bonding data (duration=0 sec.)
--- No mid-side node required
Set up nodal properties such as admissible BC etc. by adjacent elements...

In working on FEM file for a FEA model
Terminal Error: FEM2ESH#63
NO_3D_ELEMENT: please check meshing phase 3
2018/08/15-10:11:11"

Any help with solving these issues is appreciated!

Thank you

[John_Holtz · Accepted solution]

Hi @Anonymous

1. The midplane mesher is not programmed to match the mesh between different parts.
2. The "Bricks and wedges (layered mesh of thin parts)" either uses the midplane mesher or a technique that is very similar, so it is not programmed to match the mesh between different parts.
3. When did the error occur? (I am not sure what type of mesh you were trying since there is no mesh that uses only "wedges".) My guess is that the element type is not compatible with the type of mesh that was created. The other possibility is that you need to start the solid mesh generation manually (which is normally done automatically when you start the analysis or do a "Check Model"). You can start the solid mesh generation by right-clicking on "CAD Mesh Options" branch under the part in the browser and choosing "Create Solid Mesh". Maybe the part fails to solid mesh and that is why the "Check Model" cannot create any 3D elements (assuming the error message occurs during the Check Model or check model portion of the analysis).

For item 1 (midplane mesher), you can try either one of these:

• After creating the mesh, manually connect the parts together by changing the mesh. You can delete lines and draw lines to create elements, or move existing points to change the mesh.
• If you make the model from 1 part, the midplane mesher has a better chance of being able to create the mesh and connect all of the surfaces together. If you then need to change the parts (because you have different materials, for example), you can do that after the mesh is created.

Let us know what you want to do.

It may be helpful if you can attach an archive of your model: app button > Archive > Create.

[Anonymous]

Thanks a lot for the help! I appreciate it.