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For each resolution level a different stress percent goal is defined which is dependent on the stress goal set for the optimization. On the lower resolution levels the stress goal varies on purpose from the requested stress goal to realize a fast design generation. On the highest resolution level, the requested stress goal reaches 100% an thus satisfies the defined stress goal as the geometry allows it.
In one optimization several Events (load cases) can be considered. Each Event is calculated by itself and the stresses of all Events are superimposed (overlapped).
The stress calculation is from an FE point of view an estimation. That’s why we recommend a FE reanalysis using Apex Structures/Nastran to verify the results regarding all boundary conditions. For the reanlysis the intersected model should be used which will be manufactured. The reanalysis can also take dynamic loading & other boundary conditions into consideration. For more information regarding intersection have a look here.
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