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Hello to all the members, reading the book “Practical aspects of structural Optimization” I found the following sentence (beginning of pag24): “We may be asked to design a light weight bracket that has to fit in a 300x300x300mm volume. We want the bracket to be made of steel, to carry a load of 100kg. The maximum permissible deflection of the bracket is 0.1mm and the maximum permissible stress is 20kg/mm^2. We are allowed to use steel that can be 1mm 2 mm or 4mm thick. In this case, our design space would be 300x300x300mm volume. The objective would be to minimize the mass. The optimization constraint would be the permissible stress and deflection. The design variables would be the thickness of the steel and the layout of the steel. (i.e. how the sheet should “flow”- where material should be located – within the design space)” I don’t really understand how I can set this analysis. How can I ask tell the material to “flow”? Can I define the variable thickness as design variable? Thanks