Beam Bending Stress

Beam bending stress, abbreviated as \(\sigma \) (Greek symbol sigma), also called flexure, is when a beam is subjected to a load along it's length axis with stress applied perpendicular to the axis.

 

Beam Bending Stress formula

\(\large{ \sigma_b = \frac{M \; y}{I} }\)

Where:

\(\large{ \sigma_b }\)  (Greek symbol sigma) = bending stress

\(\large{ M }\) = moment about the neutral axis

\(\large{ y }\) = perpendicular distance to the neutral axis

\(\large{ I }\) = second moment of area about the neutral axis (moment of inertia)