Why does solver bog down on the third load step of my linear analysis?
I've got a model, basically a cube block that is crossed by a few cylinders.
Two material are used, one for the block(linear isotropic) one for the cylinders
(linear orthotropic). The model is loaded with 3 load steps;
1- displacement in x Direction applied to the face with its normal vector in + X direction
2- displacement in y Direction applied to the face with its normal vector in + Y direction
3- displacement in z Direction applied to the face with its normal vector in + Z direction
The first two load steps are solved very fast, both take the same time to be solved, but
when solving load step 3 it seems that the solver gets complety locked.
A mistake in the solver caused the order vector from load step 2 to be re-used in load step 3
resulting in a huge wave front of 18000. This caused the solution to be much slower. A workaround
is to use BCSOPT,METIS. This error is fixed in ANSYS 10.0 [Ref: Defect 30224]