Strain Energy Method (Castigliano’s Theorem) | Beam Deflection

Alberto Castigliano (Catigliano's Theorem)
Engr. Alberto Castigliano

Italian engineer Alberto Castigliano (1847 – 1884) developed a method of determining deflection of structures by strain energy method. His Theorem of the Derivatives of Internal Work of Deformation extended its application to the calculation of relative rotations and displacements between points in the structure and to the study of beams in flexure.