Syllabus

MODULE I – Fatigue 8 hours
Details: Basic understanding of fatigue, high and low cycle fatigue under symmetric and asymmetric cycling, ratcheting. Cyclic hardening – softening features, Micromechanisms of crack initiation and growth, fracture surface analyses. Stress and strain approaches of fatigue, Fatigue crack growth, Metallurgical variables and fatigue, Corrosion fatigue.

MODULE II: Fracture 6 hours
Details: Theoretical cohesive strength of metals, Griffith’s theory of brittle fracture, Fractographic aspects of fracture, Mechanism of brittle and ductile fracture, Fracture of composites, Notch effects.

MODULE III – Fracture Mechanics 12 hours
Details: Strain energy release rate, Stress intensity factor, Elastic stress field at and around crack tip, Airy stress function, Complex stress functions, Solution to crack problems, Effect of finite size, Plastic zone- Irwin and Dugdale models, Plane strain facture toughness, Plane stress fracture toughness, Alternative methods of fracture toughness testing, Design approach.

MODULE IV – Microstructural Aspects of Fracture Toughness 6 hours
Details: Microstructural anisotropy and toughness, Alloy cleanliness, Structural modification for improved toughness, Embrittlement theories

MODULE V – Wear 4 hours
Details: Classification of wear processes, Mechanisms of wear, Wear test methods, Worn surfaces, Types of particles present in wear debris, Wear resistance

To understand the behaviour of materials under various types of cyclic loading

To understand energy associated with fracture and stress field analysis of cracked surfaces

To assess tribological behaviour of material/component surfaces

Understanding of the in-depth fatigue behaviour of metals.

Generalization of the theories related to fracture of materials.

3. Conceptualization of the analytical expressions of fracture mechanics.

Solution to the analytical problems related to fatigue and fracture toughness.

Understanding the metallurgical aspects of fracture toughness.

Understanding the wear behaviour of metals/alloys.

G. E. Dieter, Mechanical Metallurgy, McGrow-Hill

R W Hertzberg, Deformation and Fracture Mechanics of Engineering Materials, John Wiley and Sons

David Broek, Elementary Engineering Fracture Mechanics, Sijthoff & Noordhoff

Bharat Bhushan, Introduction to Tribology, Wiley

International Journal of Fatigue, Fatigue and Fracture of Engineering Materials and Structures, International Journal of Plasticity, Engineering Fracture Mechanics