How to mesh a thin disk ( dia=150 , thickness 2) so that we don't get too many elements?

Altair Forum User

Hi all,

I have been trying to analyze an assembly of 4 thin disks of different materials. 

My problem is when I mesh the individual disks so that I can have at least 3 elements through the thickness (periphery), I get a huge number of elements on the top and bottom faces of the disk because of small element size (0.6667).

If I mesh the top/bottom faces and thickness(periphery) individually by selecting different element sizes ( 0.667 and 10) then most of the elements fail with respect to aspect ratio, element size.

The only thing that works is uniform element size of 0.6667 throughout. But it takes a lot of time to run this simple analysis. ( bottom fixed, pressure on top).

 

Any suggestions please?

 

 

Thanks,

Abhi

Altair Forum User

Hi,

 

try to use a size of 0.6667*5 = 3.3335 for the area and 0.6667 for the thickness, thats a aspect ratio of 5 and is still OK.

 

If it is possible (boundary conditions) calculate only, maybe 1/8 of the disk and create symmetry boundary conditions = same result.

 

Regards,

Mario

Altair Forum User

@Abhi: which element config do you use ? TET4? TET10? HEX8 ? HEX20 ?

How about your definition of 'too many elements' ?