Mechatronic Systems Engineering 2212A/B Lecture Notes - Lecture 14: Shear Stress, Neutral Axis

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Beams subjected to point or distributed loading will always have a shear force. A transverse shear stress will always be present. Slender beam, small depth compared with its length. Shear stress is uniformly distributed over the width. Shear formula: distance measured from the neutral axis. : moment of inertia of the entire x-section about the netral axis. : distance of the netral axis of measured from the neutral axis of the entire x: : top or bottom portion of the x-section. Procedure for calculating the transverse shear stress in a beam. Draw a section through the beam, normal to the long axis of the beam, at the point where you section about the neutral axis on the plane of the section. Draw fbd of the beam and determine all reactive forces and moment acting on the beam. Plot shear force ( ) and the bending moment ( ) diagrams for the beam want to calculate the shear stress ( )

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