Tetra mesh not working on an "enclosed" volume

Jacobier_20601

I have a set of 2D elements. When I used edge function to find edge, it says it is enclosed. But when I use tetra mesh function to mesh, it says it is not enclosed. 

How shall I mesh it?

Jason_Craanen

Hello,

Are you making sure to select all the elements.

Can you share the file or an image?

Jacobier_20601

 

Jacobier_20601

Jacobier_20601 said:

 

Jason_Craanen

Jacobier_20601 said:

Are you able to share the model?

It is really hard to tell just by the screen grabs what is going on.

Jacobier_20601

Jason Craanen_20442 said:

Are you able to share the model?

It is really hard to tell just by the screen grabs what is going on.

Hi, Jason

Here is the model file. I only included the 2D elements I wanted to use to generate the 3D elements. 

 

I have tried the new UI as well. The errors message is even more ambiguous. It just said, "failed to mesh". 

 

Jason_Craanen

Jacobier_20601 said:

Hi, Jason

Here is the model file. I only included the 2D elements I wanted to use to generate the 3D elements. 

 

I have tried the new UI as well. The errors message is even more ambiguous. It just said, "failed to mesh". 

 

I would investigate the integrity of the mesh a bit more

 

Jacobier_20601

Jason Craanen_20442 said:

I would investigate the integrity of the mesh a bit more

 

Hi, Jason

I am not familiar with the new UI.  When you said check the integrity. Do you mean the quality of the elements? Did you successfully generate the 3D elements?

Jason_Craanen

Jacobier_20601 said:

Hi, Jason

I am not familiar with the new UI.  When you said check the integrity. Do you mean the quality of the elements? Did you successfully generate the 3D elements?

Hi Jacobier,

Take a look at the 2d mesh check tool. It should point you to the areas that caused the tetra mesher to fail.

https://help.altair.com/hwdesktop/hwx/topics/pre_processing/meshing/boundary_shelll_check_t.htm?zoom_highlight=2d+check+mesh

Jacobier_20601

Jason Craanen_20442 said:

Hi Jacobier,

Take a look at the 2d mesh check tool. It should point you to the areas that caused the tetra mesher to fail.

https://help.altair.com/hwdesktop/hwx/topics/pre_processing/meshing/boundary_shelll_check_t.htm?zoom_highlight=2d+check+mesh

Thank you so much. But I don't think it is the 2D mesh quality that causes the problem because I have used the inner component to generate volumes. However, I did find some elements overlapping each other which Hypermesh does not consider them as penetration or edges. 

 

Do you know is there a way to detect overlapping/duplicated 2D elements?

 

Thank you.

Jason_Craanen

Jacobier_20601 said:

Thank you so much. But I don't think it is the 2D mesh quality that causes the problem because I have used the inner component to generate volumes. However, I did find some elements overlapping each other which Hypermesh does not consider them as penetration or edges. 

 

Do you know is there a way to detect overlapping/duplicated 2D elements?

 

Thank you.

Yes, the 2d check mesh tool I just showed you. It is not just about the quality.

https://help.altair.com/hwdesktop/hwx/topics/pre_processing/meshing/boundary_shelll_check_t.htm?zoom_highlight=2d+check+mesh

Jacobier_20601

Jason Craanen_20442 said:

Yes, the 2d check mesh tool I just showed you. It is not just about the quality.

https://help.altair.com/hwdesktop/hwx/topics/pre_processing/meshing/boundary_shelll_check_t.htm?zoom_highlight=2d+check+mesh

Thank you. But I am confused with the symbol that marks out the error 2D elements.

What does the color code means?

 

Jacobier_20601

Jacobier_20601 said:

Thank you. But I am confused with the symbol that marks out the error 2D elements.

What does the color code means?

 

Those red lines mark out the edges of the error elements. How about the orange lines?

Would you mind just try to fix some of the elements like aforementioned ones. I could not find any close-to-penetrate nodes around the marked out elements.