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In most cases, a "Preview" only takes a few minutes and gives an overview of the design that an optimization can achieve under the given boundary conditions. It can be seen where the flow of forces is located and therefore material is needed. It can be checked whether a load/event has been forgotten and where the design reaches the design space limits. This result is not a finished calcultion calculation and does not consider the defined stress goal, yet. It is a very fast, first shot at the optimization and can be used to check the boundary conditions and the ratio of the load constraints to the stress goal.
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