What is bending stress?
The fetched OmniCalculator page defines bending stress as the normal stress a beam develops while bending under load. In a downward-bending beam, the upper fibers go into compression and the lower fibers go into tension.
How to calculate bending stress
Omni expresses the maximum bending stress with the standard flexure formula:
σ = M x c / I
S = I / c
σ = M / S
Here, M is the bending moment, c is the distance from the neutral axis to the outermost fiber, I is the area moment of inertia, and S is the section modulus.
Cross-sections from the Omni workflow
The Omni page discusses typical solid and hollow beam shapes. This rebuild covers the most common symmetrical cases directly in the calculator: rectangle, square, solid circle, hollow circle, and hollow rectangle.