Course Description


The concepts of stress and strain, shear, 3D descriptions. Moduli of elastic behavior, energy of elastic deformation, thermal expansion, principal stresses/strains, inhomogeneous stress state, compatibility of strains. Stress-strain relation, anisotropic elastic behavior, generalized Hooke’s law. Plane stress and strain states. Plastic deformation, fracture, creep, fatigue, hardness. Experimental determination of mechanical properties.

Elements of crystal structure and symmetry. Point defects. Dislocations: topological characterization, motion for plasticity, dislocations in various structures, energy, forces between dislocations, multiplication mechanisms. Extended defects. Homophase and heterophase interfaces, twins, grain boundaries (large and small angle, tilt and twist boundaries, coincidence site lattice model, structural units model, motion, junctions). Heteroepitaxial interfaces, coherency, critical thickness of epilayers. Quantum wells and interlayers. Quantum dots. Superlattices. Nanowires. Other advanced nano-heterostructures. Elastoplastic behavior of nanostructures and its experimental determination.

 

Course Info


Code:  ΠΥΥ104

Group:  Compulsory

Semester:  First Semester

Hours / Week:   3

ECTS Units:  5

Instructors:  G. Dimitrakopulos