Question

The value of eo >>> ei, due the shifting of the neutral axis during bending. Explain this phenomenon with a sketch.

Answer 1

The value of eo is greater than ei when bending action occurs and due to that neutral axis of the beam shifts. it is explained in the following Image answer:

I've considered eo as outer diameter and ei as inner diameter.

Reason: when load acts on the beam, the beam is stretched down and forms a curved shape. On seeing deep into it, the lower part of the beam is subjected to tensile stress and the outer diameter eo is enlarged than the original length of the beam.

Likewise the upper part of beam is subjected to compressive stress and the inner diameter ei is decreased than the original length of the beam.

I hope my answer will clarify your doubt!!

Thanks!!