Image
The above mentioned Error Codes suggest that the model setup isn’t suitable and isn’t going to reach good optimisation results. The Error codes mention a removal of a mask and as a second consequence the removal of the applied boundary conditions which results in a termination of the optimisation model. Because of this removal the model is no longer complete and it doesn’t make sense to continue with the optimisation.
Reasonswhy Masks are tearing off:
either no force or displacement is applied on the defined Non-Design Space→ no stresses are available for the stress optimisation to prevent the material from being reduced
or the force applied is too/very small compared to the optimisation target
or the additional fixation is not needed for the defined boundary conditions and optimisation constraints
...
Prevent the tearing off by:
increasing the Complexity → more elements are available and a finer model is possible (calculation effort increases!)
reducing the optimisation Stress Goal
increasing the applied force so that the stresses and therefore the relevance of the Non-Design Space is increased
creating an extra load case in which fixations and loads are switched
Accept this result as a design proposal in order to reduce the number of fixation points
To reduce the number of fixations, the fixation has to be applied on all Non-Design Spaces at once as one boundary condition (multi-selection)
Thus individual Fixations can tear off without an occurring error
...