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

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5.1 THEORY OF SIMPLE BENDING

When a beam is subjected to a loading system or by a force couple acting on a plane passing through the axis, then the beam deforms. In simple terms, this axial deformation is called as bending of a beam (Figure 5.1).

 

Bending of beams

 

Fig. 5.1 Bending of beams.

 

When a beam is subjected to action of any load, then the fibres on one side of the beam are stretched and those on the other side are compressed. If the beam is simply supported, then the lower fibres will be under tension and the upper fibres are on compression. On the other hand, in a cantilever beam the upper fibres will be on tension and the lower fibres will be ...

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