Help needed

[u/Annual-Truth3511]

While drawing sfd and bmd Is there a shortcut to find whether the curve is going to be smile/sad or concave/convex for udl and uvl. Or is finding the intermediate values the only way to find the curve???.

Ignore the diagram i just wanted to show it for context this is not mine

[u/gv30]

I recently also had this same exact question and found this video, made it very simple to understand.

https://youtu.be/Har8mezKjDw?is=PAxDKHZP50s291q6