Learning Forum

[João Mazaro]

I am creating a mesh convergence study on a shell body in ANSYS Mechanical and refining it in certain areas with edge and face sizing. I've been able to mesh it with element sizes of 0.4 mm (63384 elements), 0.35 mm (70469 elements), and 0.33 mm (73675 elements) with no trouble; it took only a couple of minutes to finish, but when I try to set the element size to 0.32 mm, it never finishes. I left it overnight (8+ hours), and it was still stuck.

I have done meshes with a much larger number of elements (200k+) with no problem. Does anyone know why this could be happening? Thank you.

[Lydia]

Hi Joao,

As Ansys employees can not exchange files, it might be a bit challenging to diagnose without them, but here are few things you can try:

• Does your mesh only fail for 0.32 mm? Have you tried 0.31mm for example? It could be the lowest value supported from your machine
• Try to change the mesh defeaturing tolerance and see if it makes any difference https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v232/en/wb_msh/msh_auto_defeat.html?q=mesh%20defeaturing%20tolerance

[Govindan Nagappan]

Hi Joao,

Try a different method. Default is quad dominant. Insert a method control and try using Multizone mesh method

Are you using a student version?

[João Mazaro]

Hello Lydia and Govindan,

Thank you for the responses. I ended up changing my geometry a bit, and now it works just fine. I think my geometry had some sort of defect that was causing the problem. Anyway, I appreciate your help.