Hi all, I am after trying to find the plastic section modulus about both local axes (x & y) after having calculated them for the global axes (n & p). Is there a way I can transform global to local using Morh’s circle to evaluate plastic section properties? Attached is the key diagram I am working to: I have been able to evaluate all other section properties locally and globally except for the local plastic section modulus about the x and y axes. I want to avoid going back to first principals in evaluating the plastic section modulus about the rotated local axes because they may cut through the fillets (r1 & r2) which will really complicate things. Any advice would be greatly appreciated.