Bending stiffness
The bending stiffness (![K](/Images/godic/202412/24/a5f3c6a11b03839d46af9fb43c97c1881628.png")
) is the resistance of a member against bending deformation. It is a function of elastic modulus ![E](/Images/godic/202412/24/3a3ea00cfc35332cedf6e5e9a32e94da1628.png")
, the area moment of inertia ![I](/Images/godic/202412/24/dd7536794b63bf90eccfd37f9b147d7f1628.png")
of the beam cross-section about the axis of interest, length of the beam and beam boundary condition. Bending stiffness of a beam can analytically be derived from the equation of beam deflection when it is applied by a force.