Draw shear force and bending moment diagram

Question

Accepted Answer

The shear force and bending moment diagrams show the internal forces and moments in a beam.

Shear force diagram shows the variation of shear force along the length of the beam.
Bending moment diagram shows the variation of bending moment along the length of the beam.
Shear force is the algebraic sum of all the vertical forces acting on one side of the section.
Bending moment is the algebraic sum of all the moments of the forces on one side of the section.
Shear force changes sign at point of application of a vertical force or a concentrated moment.
Bending moment changes slope at point of application of a vertical force or a concentrated moment.
Shear force diagram starts and ends at zero.
Bending moment diagram starts and ends at zero.
Shear force diagram is obtained by integrating the distributed load.
Bending moment diagram is obtained by integrating the shear force diagram.

Accepted Answer

The bending moment diagram shows how. (and therefore normal stress) varies across a structure. If we know the state of longitudinal or normal stress due to bending at a given section in a structure we can work out the corresponding bending moment

Draw shear force and bending moment diagram

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