Hi again @samith,
As I understand it, different from the forces plot, the moments plot will be highly influenced by the point around which it’s being calculated. Choosing diferent points, for instance:
1
2
We get very different moments plots for the exact same boundary conditions.
All of that to say that the moments plot is dependent upon the chosen point, so what you need to do is evaluate if the moments for a given axis are not as expected considering the point around which they are being calculated.
That said, why do you think negative moments wouldn’t be expected? Let us know for further discussion!
Best,
Igor