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Hi all, I have designed a 3 point bending test of a concrete beam and did topology optimization on it. Attached below is the result, I am generally satisfied with it but I have been trying to smoothen the sharp edges and introduce a symmetry about the middle (Left half design = Right half...

Hello, Yes, it is a discrete rigid part. I will try the analytical rigid part instead. Thank you for the direction!

So how would you find the optimal size for the mesh then? I'm just confused what to do from here

Hey, thanks for the response. I will look into it. But what explains the different stress patterns on the concrete beam itself?

Hello all, I followed a youtube video & made a 3 point bending test simulation for my concrete beam. Was trying to find the optimal number of mesh to use so I tried a few simulations with different mesh size & got different stress patterns and more stress concentration at contact point instead...