In this video we explore bending and shear stresses in beams. A bending moment is the resultant of bending stresses, which are normal stresses acting perpendicular to the beam cross-section.

Focus, in particular, on the deflection at the right end of the beam, as seen below. Here, you can easily see how the laminae slide with respect to each other in the absence of shear stress between ...

When a 'beam' experiences a bending moment it will change its shape and internal stresses (forces) will be developed. The photograph illustrates the shape change of elements of a beam in bending. Note ...

CONCLUSION: If shear forces exist at a cross section of a beam, then shear stresses must develop in the beam as it deflects in order to satisfy the requirements for the E-B theory. A magnified copy of ...