Introduction of stress tensor. 3D stress and strain transformation. Eigenvalue/vector analysis for principal stresses and strains. Experimental strain measurements. Stress-strain relations. Strain energy. Thin-walled cylinders. Statically indeterminate stress systems. Bending stress, slope and deflection of beams, shear center, non-symmetric beams, composite beams, Castigliano’s theorem. Statically indeterminate beams. Buckling instability. Yield criteria. Elementary plasticity. Structural streel design SANS code. Fracture mechanics. Fatigue.