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Question

For a square-sectioned beam bent as shown in the given figure, the exaggerated view of the deformed cross - section is


A
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C
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Solution

The correct option is C
The fibres above the neutral axis will be subjected to compression and fibres below the neutral axis will be subjected to tension due bending. These bending stresses are axial in direction.
The transverse strain will also be there at all fibres cross-section due to Poisson's effect. Thus top fibres will laterally expand and bottom fibres will get compressed. Thus the deformed section will be as shown in figure (c).

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