Anelasticity and Mechanical Spectroscopy

This lecture covers the mechanical behavior of solids, including elasticity, defects like dislocations and point defects, grain boundaries, anelasticity, thermodynamics, internal energy, Gibbs energy, and the phenomenological description of energy. It also discusses the equation of the ideal anelastic solid, harmonic response, internal friction, thermal activation, point defects, dislocations, string model, relaxation at grain boundaries, and the variation of grain size in a polycrystal. The lecture concludes with mechanical spectroscopy, focusing on free pendulum, vibrating blade, and forced pendulum experiments.