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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 optimisation with the automatic Non-Design growth activated leads to results like the one below The transition here is a hard notch which also leads to peak stresses. With the Advanced User Settings the transition can be changed according to the respective needs.
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More to the automatic Non-Design growth and how these settings influence and impact the design here.