⌖The structure
Axial force N(s)
Shear force V(s) — in plane
Bending moment M(s) — in plane
Positive M is plotted downwards — on the side of the fibres it puts in tension. The dashed vertical lines mark the corners, where N, V and M generally jump.
Displacement δ(s) — in plane
δ = √(u² + v²), the total in-plane movement of the bar axis.