Questions about element check and tetra mesh optimization

Altair Forum User

Dear all,

 

When the mesh quality is insufficient, OptiStruct exits with errors. Violated criteria are given in the .out file. Some criteria do not match to those in hypermeh Tool/ check elems or those in tetra mesh optimization.

 

E.g.

 ------------------------------------------------------------------------------
 Element     Property          # of     Recommended Range    Max.  Viol.  Elem.
                               Viol.     Lower     Upper    Value  type    No.
 ------- ------------------- -------- --------- --------- --------- --- -------
 TET10   Edge Angle               297        --     75.00     85.47  U  7028914
 TET10   Face Vertex Angle        867     15.00    165.00      8.44  L  7030125
 

 

 

OptiStruct uses 'Edge Angle' for TET10. What is the corresponding criterion in HyperMesh / Tool / check elems or tetra mesh optimization?

 

I get element quality errors in OptiStruct also due to 'Face Vertex Angle' (TET10). What is the corresponding criterion in tetra mesh optimization so that I can improve those angles?

 

Kind regards

tinh

Dear all,

 

When the mesh quality is insufficient, OptiStruct exits with errors. Violated criteria are given in the .out file. Some criteria do not match to those in hypermeh Tool/ check elems or those in tetra mesh optimization.

 

E.g.

 ------------------------------------------------------------------------------

 Element     Property          # of     Recommended Range    Max.  Viol.  Elem.

                               Viol.     Lower     Upper    Value  type    No.

 ------- ------------------- -------- --------- --------- --------- --- -------

 TET10   Edge Angle               297        --     75.00     85.47  U  7028914

 TET10   Face Vertex Angle        867     15.00    165.00      8.44  L  7030125

 

 

 

OptiStruct uses 'Edge Angle' for TET10. What is the corresponding criterion in HyperMesh / Tool / check elems or tetra mesh optimization?

 

I get element quality errors in OptiStruct also due to 'Face Vertex Angle' (TET10). What is the corresponding criterion in tetra mesh optimization so that I can improve those angles?

 

Kind regards

 

Hi,

Are you performing shape optimization?

hypermesh check face vertex angle but some solvers concern about face-edge-face angle

also with tetra model you should verify tet collapse. so thin tetras make poor quality of model

for other types of angle you need a script or a template to check by hypermesh