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The next picture shows the FE-Reanalysis with MSC Apex (Structures). The high precise FE-Analysis shows even more clearly stress risings at the transitions from the Non-Design Spaces to the Design structure. These stress risings are only on the surfaces of the material and do not necessarily have to have an influence on the tensile strength of the part.
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The shown GD-Bracket optimisation was done with the default settings which lead to smooth transitions between Non-Design Spaces / Interfaces and Design structure to avoid hard notches. Stress risings often have an impact on the fatigue life of a part and should be considered.
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