Symmetry not working correctly
Symmetry not working correctly
(OP)
I'm getting very different results when I try to use symmetry in Ansys 12.
I have a simple box with a force on the bottom; see picture.
When I run FEA on the whole thing, the box bottom deflects 0.1".
When I run it in symmetry, ansys tells me the box bottom deflects 0.4".
Setup for FEA on entire model:
4000lbs force on the bottom
Fixed support around the rim
Setup for FEA on symmetric model:
Only analyzing 1/4 of model
1000lbs force on the bottom
Fixed support around the rim
Frictionless support around cut faces.
Am I missing something? Thanks!
I have a simple box with a force on the bottom; see picture.
When I run FEA on the whole thing, the box bottom deflects 0.1".
When I run it in symmetry, ansys tells me the box bottom deflects 0.4".
Setup for FEA on entire model:
4000lbs force on the bottom
Fixed support around the rim
Setup for FEA on symmetric model:
Only analyzing 1/4 of model
1000lbs force on the bottom
Fixed support around the rim
Frictionless support around cut faces.
Am I missing something? Thanks!





RE: Symmetry not working correctly
When I matched the mesh size of the whole model to the symmetry model, the results match.
Scary that the results can be off by 600% with the default mesh size....