How to import AVIZO file into Hypermesh?

Nafiseh

Hello,

 

I would like to import the RVE model developed in AVIZO software into the HyperMesh for mesh refinement, as AVIZO's meshing capabilities are limited. It seems like extracting the geometry could make adjusting the mesh size in Hypermesh easier. Could you advise on the best file format to export the geometry of the RVE model? I have tried several formats, but only the meshed model gets imported.

 

Any assistance would be greatly appreciated!

 

Thank you,

 

Jason_Craanen

Nafiseh said:

That's great to hear!

It seems the issue was related to the version of Hypermesh I'm working with, and I'll need to upgrade it.

Could you please share the file with the verified mesh with me?

Thank you!

Nafiseh

 

I still don't feel the version should matter in this case, but I don't even have 2019 any more to check.

 

Jason_Craanen

Hello,

YOu can find the supported CAD formats for Hypermesh in the help documentation

https://help.altair.com/hwdesktop/hwx/topics/pre_processing/geometry/cad_readers_supported_r.htm

Thanks

jason

Nafiseh

Jason Craanen_20442 said:

Hello,

YOu can find the supported CAD formats for Hypermesh in the help documentation

https://help.altair.com/hwdesktop/hwx/topics/pre_processing/geometry/cad_readers_supported_r.htm

Thanks

jason

Hello Jason,

Thank you for your response.

I’ve reviewed the acceptable CAD formats for Hypermesh under the Import Geometry tab. However, I’m facing the issue that the 3D RVE model developed in Avizo has already been meshed. When I try exporting it in formats like SLDRT from Avizo and importing it into Hypermesh, I encounter an error while reading the file. Could this be related to the version of Hypermesh I’m using (2019.1)?

Additionally, have you ever tried exporting a file from Avizo and importing it into Hypermesh?

Best regards,
Nafiseh

Jason_Craanen

Nafiseh said:

Hello Jason,

Thank you for your response.

I’ve reviewed the acceptable CAD formats for Hypermesh under the Import Geometry tab. However, I’m facing the issue that the 3D RVE model developed in Avizo has already been meshed. When I try exporting it in formats like SLDRT from Avizo and importing it into Hypermesh, I encounter an error while reading the file. Could this be related to the version of Hypermesh I’m using (2019.1)?

Additionally, have you ever tried exporting a file from Avizo and importing it into Hypermesh?

Best regards,
Nafiseh

Hello,

I am unfamiliar with that software. However, do you have geometry from your 3D model? What exactly are you exporting from the other software? 

I believe you can only export mesh OR CAD not both in the same file.

Nafiseh

Jason Craanen_20442 said:

Hello,

I am unfamiliar with that software. However, do you have geometry from your 3D model? What exactly are you exporting from the other software? 

I believe you can only export mesh OR CAD not both in the same file.

Yes, the model has geometry when you're developing it in AVIZO. The software also has a Meshing tab to create a mesh, but it's not very robust. Therefore, I want to export the geometry to Hypermesh, which is much stronger for meshing.

However, I am facing an issue: the model exported from AVIZO seems to include the mesh, and I can't export just the geometry. I exported it as a .bdf file and used the "Solver Deck" option in Hypermesh, selecting the Nastran format (which contains only the elements, without geometry). I then used the "Tetra Remesh" option, but the mesh size doesn't seem to change in this case.

Jason_Craanen

Nafiseh said:

Yes, the model has geometry when you're developing it in AVIZO. The software also has a Meshing tab to create a mesh, but it's not very robust. Therefore, I want to export the geometry to Hypermesh, which is much stronger for meshing.

However, I am facing an issue: the model exported from AVIZO seems to include the mesh, and I can't export just the geometry. I exported it as a .bdf file and used the "Solver Deck" option in Hypermesh, selecting the Nastran format (which contains only the elements, without geometry). I then used the "Tetra Remesh" option, but the mesh size doesn't seem to change in this case.

I cannot help with the export out of AVIZO. However a bdf (solver deck) will ONLY contain mesh. There will not be any geometry. So you will need to figure out how to export geometry from your software. And I have shown you the supported cad formats.

I have found tetra remesh works best when refining smaller about half. I would typically recommend updating the 2d surface mesh instead. And then refilling with tets.

Nafiseh

Jason Craanen_20442 said:

I cannot help with the export out of AVIZO. However a bdf (solver deck) will ONLY contain mesh. There will not be any geometry. So you will need to figure out how to export geometry from your software. And I have shown you the supported cad formats.

I have found tetra remesh works best when refining smaller about half. I would typically recommend updating the 2d surface mesh instead. And then refilling with tets.

Thank you for your response. Could you please help me with how to update the 2D surface mesh?

I really appreciate your time and help. here is the model that I've imported through Solver Deck.

Jason_Craanen

Nafiseh said:

Thank you for your response. Could you please help me with how to update the 2D surface mesh?

I really appreciate your time and help. here is the model that I've imported through Solver Deck.

If those are 3d elements, you can extract faces

https://help.altair.com/hwdesktop/hwx/topics/pre_processing/model_setup/free_faces_find_t.htm?zoom_highlight=faces

And then simply remesh the faces

https://help.altair.com/hwdesktop/hwx/topics/chapter_heads/genreal_2d_meshing_c.htm

Nafiseh

Jason Craanen_20442 said:

If those are 3d elements, you can extract faces

https://help.altair.com/hwdesktop/hwx/topics/pre_processing/model_setup/free_faces_find_t.htm?zoom_highlight=faces

And then simply remesh the faces

https://help.altair.com/hwdesktop/hwx/topics/chapter_heads/genreal_2d_meshing_c.htm

Thank you! I got an error while extracting the faces although I have selected the elements.

Jason_Craanen

Nafiseh said:

Thank you! I got an error while extracting the faces although I have selected the elements.

Is it possible those are already 2d/shell/face elements? 

If so you can skip that step and go right to remeshing.

Nafiseh

Jason Craanen_20442 said:

Is it possible those are already 2d/shell/face elements? 

If so you can skip that step and go right to remeshing.

No, they are 3D elements. When I use Tetra remeshing, the mesh size doesn't change, even though I adjust the element size to be coarser or finer.

I'm wondering if this issue could be related to the version of Hypermesh I'm using (2019.1), considering that the AVIZO version I'm using is 2024.

Jason_Craanen

Nafiseh said:

No, they are 3D elements. When I use Tetra remeshing, the mesh size doesn't change, even though I adjust the element size to be coarser or finer.

I'm wondering if this issue could be related to the version of Hypermesh I'm using (2019.1), considering that the AVIZO version I'm using is 2024.

Shouldn't matter. Can you share the file? 
I would recommend updating to a newer version of Hypermesh though as well. 2019 is no longer a supported version.

Nafiseh

Jason Craanen_20442 said:

Shouldn't matter. Can you share the file? 
I would recommend updating to a newer version of Hypermesh though as well. 2019 is no longer a supported version.

Hello,

Attached is the HyperMesh file.

Thanks 

Jason_Craanen

Nafiseh said:

Hello,

Attached is the HyperMesh file.

Thanks 

Works fine in latest version. 

Delete solid elements and remesh

Nafiseh

Jason Craanen_20442 said:

Works fine in latest version. 

Delete solid elements and remesh

That's great to hear!

It seems the issue was related to the version of Hypermesh I'm working with, and I'll need to upgrade it.

Could you please share the file with the verified mesh with me?

Thank you!

Nafiseh

 

Jason_Craanen

Nafiseh said:

That's great to hear!

It seems the issue was related to the version of Hypermesh I'm working with, and I'll need to upgrade it.

Could you please share the file with the verified mesh with me?

Thank you!

Nafiseh

 

I still don't feel the version should matter in this case, but I don't even have 2019 any more to check.

 

nafise

Hello,
Thank you for your assistance.

I'm unable to sign in with my previous account, so I’m commenting with a new one. I have a question about converting 2D faces that I've extracted from 3D elements into a solid. I've tried using the FE Geometry option under Topology to convert the elements, but I'm facing an issue. When I convert each of the three phases (colors) into a solid one by one, parts of the same phase are getting assigned different colors. For example, while converting the green phase, some parts unexpectedly turn red.

Could you please help me with a way to convert each of these phases into solids one by one without this problem? I’d really appreciate any guidance you can provide.

Thank you!