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Void Spaces add Access Region, Clearance Region, Excluded Part
Explain Retained Part
For the optimisation we define different areas of the geometry. These are mainly Design and Non-Design Spaces.
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The Design Spaceis the most important space and complies with the imported/created solid CAD geometry. It includes any space where material is allowed to be or has to be, to provide maximal freedom for the algorithm. If the Design Space is limited, so is the optimisation algorithm and the optimisation potential is reduced.
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Tip: Avoidance of stress rising on Design Space boundaries. Sometimes it is useful to reduce the Design Space a little bit for the optimisation by subtracting an offset. The optimisation is carried out with this reduced Design Space. However, the intersection afterwards is done with the originally defined Design Space in order to avoid sharp edges and thus stress risings. This way you avoid stress risings on the boundaries after you have combined your optimisation result with your original Design Space.