Mumbai university > MECH > SEM 3 > Strength Of Materials

Marks: 5M

Year: June 2014

Sagging and Hogging are the terms used to define the sign of a bending moment. The bending moment which causes a beam to bend with the concave side upwards, is called a Sagging Bending Moment. This kind of bending moment is treated as a positive bending moment.

On the other hand, the bending moment which causes a beam to bend with the concave side upwards is called a Hogging Bending Moment. This kind of a bending moment is treated as a negative bending moment.

Alternatively, if the bending moment is in the anticlockwise direction on the R.H.S of the beam, then it is considered as a positive bending moment. Similarly, if it is in the clockwise direction on the L.H.S. of the beam, it is taken as a positive bending moment