Meshing complex STL file

Hi,

I have a problem with a complex component (STL file) that contains different dimension of triangles because there are lattice regions and massive regions. Unfortunatley, i try to use the 'shrink wrap' command, but this creates or little tretra-elements (and after the analysis is very expensive) or big elements(in this case i lose the details of reticular part). How can i do?

I try to convert all the STL file in surfaces using 'From FEA' in surface, but the result is a very irregular surface with a lot of hole.

Thanks

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Altair Forum User

Hi Andreabb

set minimum tet collapse value and generate the mesh

Altair Forum User

Hi Pooja S,

how can i do this? Do you mean the collapse of the nodes?

Altair Forum User

Hi Andreabb

Tet collapse defines the height of tetra elements , can be set as shown in the below image

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Unfortunately, this way creates uniform mesh (tetra elements similar in dimension, i try with 0.01 minimum tet collapse) and collapse the details of the lattice region. Do you know other solutions?

Altair Forum User

Hi Andreabb

Please share the model

Altair Forum User

Hi Andreabb

Attached the video clip for your reference , it might help you

To create tet elements click on 3D> tetramesh

Unable to find an attachment - read this blog

Altair Forum User

Hi Pooja S,

My structure is more complex. I create two different mesh with 'shrink wrap' and this is a part of my model. There are two components: lattice part (that needs precise mesh) and massive part (that needs rought mesh). How can i merge the two part?

Unable to find an attachment - read this blog

Altair Forum User

Hi Andreabb

the best is do the 2D mesh on the outer surface with tria elements with good quality and then create the solid mesh

for solid mesh refer the pdf

https://altairuniversity.com/wp-content/uploads/2014/02/HM_TetraMeshintro.pdf

Altair Forum User

Thanks Pooja S,

I make the tria-mesh on the surfaces(2d) but after this the solid mesh (tetramesh) isn't available because 'the mesh is not enclosed'.

QuyNguyenDai

Just identify not enclosed zones and make manual correction.

Altair Forum User

Unfortunatley there are a lot of this not enclosed zones and I can't adjust these.