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ENGR 220 Section 6.1~6.2 BENDING

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Internal Forces

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Method of Sections

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Internal Forces in 2-D

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**Shear and Moment Diagrams**

For beams we can calculate the shear and moment diagrams as a function of position along the beam. Internal normal force will not be considered in that most loadings are vertical on a beam and were are primarily concerned about shear and bending failures.

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**Graphical Method for Shear and Bending Moment Diagrams**

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Sign Convention Shear ~ positive direction is denoted by an internal force that causes a clockwise rotation on which it acts. Moment ~ positive direction is denoted by and internal moment that causes a compression or pushing on the upper part of the member

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**Graph the internal forces shear force and bending moment along the axis of the beam.**

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**7-87: Draw the shear and loading diagrams**

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