Hi
I am new user if LIGGGHTS and I am trying to do simulation but I am getting error. I am using the given error
fix cad1 all mesh/surface/stress file meshes/isgec1.stl type 1 scale 0.001 curvature 1e-05 wear finnie
ERROR
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Mesh cad1: 1308 elements have high aspect ratio (soft limit: smallest angle > 0.500000 ° required)
WARNING: Fix mesh: Mesh contains highly skewed element, moving mesh (if used) will not parallelize well (../surface_mesh_I.h:657)
Mesh cad1: 514 mesh elements have a really unreasonably high aspect ratio (hard limit: smallest angle must be > 0.057296 °)
ERROR on proc 0: Fix mesh: Bad mesh, cannot continue. You will need to fix or remove these element. Remedies:
- You can use the 'element_exclusion_list' feature to remove elements with too many neighbors and elements with angles below the hard limit
(../surface_mesh_I.h:683)
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I have attached the screen shot of the error
| Attachment | Size |
|---|---|
 liggghts_error.png | 243.66 KB |
richti83 | Wed, 08/29/2018 - 22:25
I guess you exported your
I guess you exported your mesh from CAD with a lot of details.
1st you should remove all unneeded features (phases, holes, wall-thickness ..),
2nd I would recommend to export from CAD to step file and than use netgen mesher to make equilateral triangles (setting max and min edge length to max=min+1, you need to play around with the exact value)
3rd if you really want to use >100.000 triangles** you can use element_exclusion_list write blacklist_mesh.txt [...], run 1 step, use element_exclusion_list read blacklist_mesh.txt [...] in follow up simulation.
**keep in mind that one triangle is as expensive than 11 particles, so you need a relay big computer ...
best,
Christian.
Rahul Kumar | Thu, 08/30/2018 - 08:20
thanks a lot
thanks a lot
I will give it a try