Manual mesh refinement vs convergence settings

[george0621]

Hi, 

I simulating a part where I can achieve convergence by manually refining the mesh element size. However, while using the automatic function using convergence settings, I can't achieve a similar result. The calculated stress just keeps increasing. Does anyone know what could be causing this?

best regards,

George

[george0621]

Hi, 

I simulating a part where I can achieve convergence by manually refining the mesh element size. However, while using the automatic function using convergence settings, I can't achieve a similar result. The calculated stress just keeps increasing. Does anyone know what could be causing this?

best regards,

George

[Gabriel_Watson]

You would have to share the file, but 99% of cases I would say you have stress concentration points that need a better fillet or transition in the geometry, so that the mesh can be effective.

[Gabriel_Watson]

You would have to share the file, but 99% of cases I would say you have stress concentration points that need a better fillet or transition in the geometry, so that the mesh can be effective.

[george0621]

I believe it is something with the geometry but I'm not sure what the best way to address it is. Any tips would be welcome! I've attached the model for reference.

[george0621]

I believe it is something with the geometry but I'm not sure what the best way to address it is. Any tips would be welcome! I've attached the model for reference.

[johnsonshiue]

Hi! Another possibility is that there is bad geometry. Go to the Modeling environment -> press Ctrl+F7. Does it report any bad body? If yes, please run through Repair Bodies workflow to fix the bad geometry.

Another possibility is that there is too much detailed geometry. Try using Delete Face -> Heal to remove unneeded detail geometry.

Many thanks!

[johnsonshiue]

Hi! Another possibility is that there is bad geometry. Go to the Modeling environment -> press Ctrl+F7. Does it report any bad body? If yes, please run through Repair Bodies workflow to fix the bad geometry.

Another possibility is that there is too much detailed geometry. Try using Delete Face -> Heal to remove unneeded detail geometry.

Many thanks!

[george0621]

I ran the check, there doesn't seem to be any bad bodies. I believe it is just the sharp edges that is causing the issues. Apart from using fillets, is there any way to resolve this?

[george0621]

I ran the check, there doesn't seem to be any bad bodies. I believe it is just the sharp edges that is causing the issues. Apart from using fillets, is there any way to resolve this?

[george0621]

Is there any way to keep the sharp edge an run the simulation, I would like to see what the effects of the edges are.

[george0621]

Is there any way to keep the sharp edge an run the simulation, I would like to see what the effects of the edges are.