SFD and BMD with examples

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SFD and BMD are diagrams used in structural engineering to determine the internal forces and bending moments in a beam.

SFD stands for Shear Force Diagram and shows the variation of shear force along the length of a beam.
BMD stands for Bending Moment Diagram and shows the variation of bending moment along the length of a beam.
SFD and BMD are used to determine the maximum shear force and bending moment in a beam, which are important for designing the beam's cross-section.
SFD and BMD are typically plotted using the equations of equilibrium and the equations of compatibility.
For example, consider a simply supported beam with a point load at the center. The SFD will be a straight line with a maximum value at the center, while the BMD will be a parabolic curve with a maximum value at the center.

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