# BENDING STRESS

Bending stress is calculated from Bending Moment and Area Moment.

Smartboard Notes: Bending-Stress.pdf Bending-Stress.oneThe formula for determining the bending stress in a beam
under simple bending is^{}:

where;

σ is the bending stress (Ivonaff uses f_{b})

*M*- the moment about the neutral axis

*y*- the distance to the neutral axis

*I*

_{x}- the second moment of area about the neutral axis

*x*

*b*- the width of the section being analyzed

*h*- the depth of the section being analyzed

Vertical Bending Ixx |
Lateral Bending Iyy |
Torsion J |

#### Questions:

Assignment: Do all questions

Questions 29:1-29:11 (Chapter 29.3: Shear force and Bending
Moment)

OPTIONAL: Questions 30:1-30:9 (Chapter 30: Deflection of Beams)