Symmetrical solid models

[dorin.r.ghimpu]

Hi All,

I have a solid symmetrical model shaped like a cylindrical hat that has a pressure applied inside. I've sectioned the 'hat' , put boundary conditions and applied the pressure load. After that I've tried and ran the whole 'hat' to compare the results.

The results stress and displacement are slightly different.

Shouldn't I get the same stresses in both cases?

Please advise when possible.

Thank you much,

Dorin G.

[John_Holtz · Accepted solution]

Hi Dorin,

If the mesh is identical, and the full model is constrained to prevent potential rigid body motion, then the results would be identical. 

I suspect the mesh is not identical, meaning the mesh in the full model does not have 2 planes of symmetry. Because the mesh is different, the results can be different. (It also depends on the mesh size. If the mesh is sufficiently small, the results would be very close in the two models.)