The bending stiffness) is the resistance of a member against bending deflection/deformation. It is a function of the Young's modulus, the second moment of area 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.

is the deflection. According to elementary beam theory and the resulting curvature of the beam is:

is the distance along the beam. Double integration of the above equation leads to computing the deflection of the beam, and in turn, the bending stiffness of the beam. Bending stiffness in beams is also known as Flexural rigidity.

See also

• Applied mechanics

• Beam theory

• Bending

• Stiffness

References