Hello,
Im a student.
I am trying to realize a topological optimization of a cube. the goal is volume / mass optimization.
I have a cube (my design space) with a hole that acts as a tapping, a 1mm thick plate that is connected to my cube and is encased (the first boundary condition); My cube is connected to a 2D plate by rigid elements of type RBE2. This 2D plate undergoes a force of 40 on one side (I do not want more to stay in the elastic domain) and is encased on the other side ( second boundary condition )
I impose optimization conditions on the RBE2 rigid point moving along the X, Y, Z axes.
My problem is that no matter what I use, I do not get any shape ... all I have is semi-dense area (density between 0.5-0.7) and the closer I get to 1 and the more I get nothing, and the reduction in volume is 95% 93%, which seems really huge.
At first, I tried to increase the moving constraints of my optimization problem because I had constraint violations when I parsed the .out file. Now I have no more constraint violations but still have a decent topology ... I'm stuck.
I do not know if I have badly defined my optimization problem, if my geometry is not good ( i dont think that can be the problem ), or if my optimization answer is not the right one.
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