EngiRef / Civil Engineering Formula
Bending Stress
Bending Stress: Stress due to bending moment. A Beams formula in civil engineering. Variables σ, M, y and I, each with SI and imperial units.
Beams
Specification
- Name
- Bending Stress
- Discipline
- civil
- Category
- Beams
- LaTeX
- \sigma = \frac{My}{I}
- Description
- Stress due to bending moment
- Conditions
- Linear elastic, pure bending; plane sections remain plane
- Can solve for
- σ, M, y, I
- Tags
- bending, stress, moment, flexure
Variables
| Symbol | Name | Unit | Si Unit | Imperial Unit |
|---|---|---|---|---|
| σ | Bending Stress | Pa | Pa | psi |
| M | Bending Moment | N·m | N·m | ft·lbf |
| y | Distance from NA | m | m | in |
| I | Moment of Inertia | m⁴ | m⁴ | in⁴ |
Common questions
- What is the Bending Stress formula?
- Stress due to bending moment. It sits under Beams, Civil engineering in the EngiRef reference.
- What do the symbols in the Bending Stress formula mean?
- In Bending Stress, σ is bending stress in Pa; M is bending moment in N·m; y is distance from na in m; I is moment of inertia in m⁴.
- When does the Bending Stress formula apply?
- Bending Stress holds under this condition: Linear elastic, pure bending; plane sections remain plane.