I am trying to generate a custom 3D mesh on the following geometry. The geometry has some extremely narrow parts which I would like to model in more detail than the rest of the geometry.
I tried following approach:
Since the geometry is a bored plate, I generated one side 2D cover mesh with the 2D Mesh+paver. I used the 2D local remesh to improve the mesh on the required part and used the 3D Swept Mesh to generate the layered mesh throughout the volume.
The 3D Swept Mesh failed: "Algorithm failed - the quality of the elements is too poor" When I checked the 2D mesh quality it really showed some failed elements.
So, I have following questions:
Thanks in advance,
Have you tried defining mesh size controls on the edges? Then turn ON the option to transition the mesh. This could eliminate the need for 2D local remesh and get you to a solid mesh.
If the solid mesh is just an extrude of the shells, you could manually extrude the elements into solids. Then you can check the solid element quality. The drawback here is that the solid mesh won't be associative to the geometry.
If you want to send me an example, I can take a look.
Simulation Product Management
Product Engineering Software
Siemens Industry Sector
Siemens Product Lifecycle Management Software Inc.
thanks for the quick answer. So I suppose you suggest to use:
MeshControll + (2D Mesh+Transient Size) + 3D Swept Mesh
With this I have following result/problem:
The Transient mesh controll, in the 2D Mesh dialog box, is checked, but there is no value to controll the transient mesh ratio. So, this solution is even worse than the first one.
I am attaching model sample for you to experiment on.
For clear understanding....
I used the "Size on edge" mesh controll with overall size 0,05
And I used 2D Mesh generator with paver on, element size 5, allowed triangles and "Transition element size" checkbox checked.
Thank you for sharing your data and clarifying how you've tried to mesh the face. I was thinking of using the same type of approach. It's fairing poorly for me too. I succeeded by forcing the transition in the geometry. I split the solid into 3 bodies by offsetting the slot edges into the face. I chose to offset the edges by 0.2mm.
I defined edge densities of 0.05mm on all the slot edges. Then I created a shell mesh on the slot solid body's face using a size of 0.2mm and transition ON. I did the same with the other co-planar faces on the other 2 solids, but used a size of 5mm. After that I generated 3 solid meshes. I was using NX 9 as I don't have NX 8.5 loaded on my machine.
The attached files represent the CAD geometry from my 3 solid bodies and the mesh from my 3 swept meshes (parasolid and Nastran bulk data files).