E8b7af774, Ec3b1ac29 & E8bb13ecb

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.

Reasons why 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

Steps to prevent this behaviour:

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

Boundary condition multiselection of Non-Design Spaces to enable tearing off of Fixations.