Stress and Strain (beyond 1D)

This lecture covers stress and strain beyond 1D, focusing on hyperstatic systems with pre-stressed elements and internal loads. It discusses examples like reinforced concrete and spoked wheels, reduction of degrees of freedom, and the concept of traction vectors. The lecture delves into the analysis of deformable structures, axial loads, and the introduction of strain, stress, and Hooke's Law in 1D. It also explains the definition of traction vectors, the total sum of forces on a plane in a solid body, and the equilibrium on a wedge of thickness. The stress tensor is explored, emphasizing the importance of understanding internal forces and moments in beams.