where:
σ = Bending Stress (N/m² or Pa)
M = Bending Moment (Nm)
y = Distance from neutral axis (m)
I = Moment of inertia of the cross section (m4)
- The material is linear elastic, i.e. it behaves according to Hooke's Law.
- The material is homogeneous and isotropic.
- The deformation of the beam is small, such that the geometry of the beam remains practically unchanged when under load.
- The beam is under pure bending without axial or shear forces.