Question

In a R.C. section under flexure, the assumption that "a plane section before bending remains plane after bending" leads to

• A. Strain distribution being linear across the depth
• B. Stress distribution being linear across the depth
• C. Both stress and strain distribution being linear across the depth
• D. Shear stress distribution being uniform along the depth

Answer 1

The correct option is A Strain distribution being linear across the depth

Plane sections normal to the axis remain plane after bending, this assumption means that strain at any point on the cross-section is directly proportional to its distance from the neutral axis.