Question

The basic assumption of plane section normal to the axis of beam before bending remains plane after bending, implies that

• A. uniform stress over the beam cross-section
• B. uniform strain over the beam cross-section
• C. linearly varying strain over the cross section
• D. stresses which are proportional to strains at the cross section

Answer 1

The correct option is C linearly varying strain over the cross section

The longitudinal strain at any point across a section is proportional to its distance from the neutral axis.