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Then the optimization target must be defined. With AMendate, a target stress is specified that serves as the reference during optimization. For this purpose, a fatigue strength value of the material can be used and provided with an additional safety factor. The software does not take any safety factors internally into account when determining the design. This must be included in the maximum stress by the engineer. Through the stress-oriented optimization, an optimally uniformly loaded component is developed, in which above all the transitions between struts and surfaces are formed optimally and with few stress increases. The standard unit of stress MPa = Nmm^2 corresponds to the previously mentioned system of units
Symmetry
An axis symmetry around the coordinate origin can be selected for the calculation of symmetrical components. A model structure with complete geometry is recommended for this. For the calculation, however, only the positive area of the spatial axes is used, the result is then mirrored into the negative area. Both the geometry and the boundary conditions are mirrored. Therefore, for loads beyond the zero point (e.g.: area load of a symmetrical bridge), only the load portion for the positive coordinate space may be specified (halved force, corresponding to half the area, e.g.: only force on one of the bridge sides). For a correct calculation ALL boundary conditions must be symmetrical, this applies to fixations, forces and moments. Errors can easily creep in, especially when defining moments.
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