Meshing Problems

Rahul_P1

Hey Guy´s,

as you can see on the pictures below I´ve got a problem with mehsing the model.

At the yellow colored faces (shared faces which belong to both solids) I created a 2D-automesh. Afterwards I use 'tetra mesh'-panel to create a mesh to all solids.

Hypermesh statusbar says: 'Problem with surface normal orientation'

Do you know whats wrong, e.g. in my model or in the procedure?

Rahul_P1

Kned,

Try without curvature and proximity settings and let us know what you find

Rahul_P1

Hello Rahul,

Your tip did not work. 
Do you have other suggestions?

Rahul_P1

Kned,

Try to equivalence free nodes to eliminate free edges. go to tool page-->Edges-->select elements-->Equivalence.

Also could you please explain about the surfaces shown in picture below?

 

I used volume tetramesh (without 2D mesh) and everything went smooth.

refer to the picture below:

Rahul_P1

without 2D AutoMesh it works too! But it's not the solution I want to have.
The purple surfaces in the picture are created for trim the solids to create a submodel. Sub-modeling are needed to try the free body diagrams.

Do you know other ways for create a sub model or cross sections for FBD?

How can I avoid the mesh error?

Regards,
kned

Rahul_P1

Kned,

The surface normal orientation error is probably due to duplicate elements in your surface mesh,

1. Go to check elements panel. tool > check elems or mesh > check > check elems
2. Click on duplicates.
3. Click on save failed.
4. Go to delete panel. tool > delete
5. Retrieve the elements. click on the yellow 'elems' entity selector > click on retrieve

You can also reorient the surface normals and the element normals, however you definitely have to remove the free edges using tool > equivalence