How to create a uniform tetrahedral mesh?

Hi!

I am modeling an organic object. I tried using all the tetramesh options but no matter what I do, I can't seem to get my elements to be about ~1.5 elements. I'm getting a significant range from 0.5 to 3. The only solution I've found so far was to use solid optimization but that takes a very long depending on how strict my criteria is. I simply want elements that are between 1.0 and 2.0 when an idealized goal of 1.5. I plan to take my model to do explicit analysis but that is very difficult if I can't control for small elements. But I also cannot have very large elements because I have material properties that are size dependent.

Would anyone have experience enforcing a tight range (relatively?) of element sizes? Do I have to use other elements to get a uniform size? If so, would they fit organic shapes well?

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HyperMesh

v2022.2

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Jason_Craanen

Hello,

You could try these options

William Kuo_21386

Hi! I tried those settings, even in script but I still get significant amount of elements outside my ranges by using 3D check. Is there no way I can reiterate the mesh generate until I get these values?

Jason_Craanen

Hi! I tried those settings, even in script but I still get significant amount of elements outside my ranges by using 3D check. Is there no way I can reiterate the mesh generate until I get these values?

You might want to try with a surface mesh first using the optimize option with your criteria file.

keep in mind your mesh size will be very sensitive to your cad/features

William Kuo_21386

You might want to try with a surface mesh first using the optimize option with your criteria file.

keep in mind your mesh size will be very sensitive to your cad/features

I tried that. Actually, I set the min and max size to an ideal 2.0, because I was generating so many smaller elements.

Overall, I'm struggling to figure out a way to generate a more consistent mesh. I tried using solid optimization but that fails pretty consistently.

Jason_Craanen

I tried that. Actually, I set the min and max size to an ideal 2.0, because I was generating so many smaller elements.

Overall, I'm struggling to figure out a way to generate a more consistent mesh. I tried using solid optimization but that fails pretty consistently.

You may want to try rebuild or batch tools that use the criteria/parameter file to more aggressively make quality corrections

If the element size is being influenced by geometry or features, you may want to increase your feature angle break. You may lose sensitivity to features and topology on your model, but have more control over element size.

Jason_Craanen

You may want to try rebuild or batch tools that use the criteria/parameter file to more aggressively make quality corrections

If the element size is being influenced by geometry or features, you may want to increase your feature angle break. You may lose sensitivity to features and topology on your model, but have more control over element size.

You can also try Mesh Controls