Deformation of Materials: Stresses, Deformations, and Elasticity

This lecture covers the study of the processes involved in the deformation of materials, focusing on stresses (force per unit area) and deformations (variation of length). It explains the bonding energy between atoms and introduces Young's modulus as a measure of material stiffness. The module discusses the wide range of Young's modulus values for different materials, from polymers to ceramics, and their relation to the material's rigidity. It also explores the concepts of linear elasticity, plastic behavior, and rupture in metals, ceramics, and polymers. The lecture delves into the measurement of elastic modulus through tensile tests, the role of dislocations in plasticity, and the significance of corner dislocations in metals.