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Strength of Materials by V. Ramasamy, P. Purushothama Raj

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5.4 SHEAR STRESSES IN BEAMS

When a beam is subjected to bending moment, normal tensile and compressive stresses prevail along the cross section of the beam. In addition to the above stresses, transverse sections are subjected to vertical shearing stresses. Vertical shearing stresses are always accompanied by complementally shear stress of equal intensity in a perpendicular plane. Shear stress varies along longitudinal planes since the perpendicular section resists the shear forces.

Assumptions made for simple bending may also be adopted for their investigation. It is seen that transverse shear stress in beams generally increases towards the neutral axis from top to bottom of the section. As longitudinal stresses are almost negligible near the ...

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