Virtual Work II

This lecture covers the concept of virtual work in mechanical systems, focusing on the equilibrium of external loads and arbitrary virtual displacements. It explains the principle of virtual work, kinematic relations, and determining equilibrium positions in structures. The lecture also delves into the theory of linear elastic behavior in beams, bending stiffness, and stretching stiffness. Additionally, it discusses strain-displacement relations for nonlinear beams and the Föpl-von Kármán plate theory for thin plates under large deflections.