Hi Aspirant!

In simple words, we can say that bending stress is borned by bending moment which means bending moment is father of bending stress.

>> Bending stress is caused by bending moment.

>> Bending moment is defined as the moment (force x perpendicular distance) that is acting on either left or right of a reference cross section.

>> During bending process the longitudinal elements of the beam will be in tension and compression. This increase or decrease in length of the beam will induce normal stresses in the beam often referred to as bending stresses.

Thankyou!