My watch list
my.chemeurope.com

# Bending stiffness

The bending stiffness EI of a beam (or a plate) relates the applied bending moment to the resulting deflection of the beam. It is the product of the elastic modulus E of the beam material and the area moment of inertia I of the beam cross-section. According to elementary beam theory, the relationship between the applied bending moment M and the resulting curvature κ of the beam is

$M = E I \kappa = E I \frac{\mathrm{d}^2 w}{\mathrm{d} x^2}$