Mechanical Behaviour of Materials (Part – II)

ABOUT THE COURSE:This course has a vast syllabus and hence it has been partitioned into two sections. At the end of both the sections of the course, students should be well conversant with theory of plasticity, theory of dislocations and its relation to various mechanical properties exhibited by various materials, viz. strength, fracture, fatigue and creep.INTENDED AUDIENCE:Undergraduate Students and first year graduate students of following discipline: Materials Engineering, Mechanical Engineering, Metallurgical Engineering, Aerospace EngineeringPREREQUISITES:A course related to nature and properties of materialsINDUSTRY SUPPORT:Manufacturing Companies, Automobile companies

Week 1: Recap of Part I, Introduction to fracture mechanics, Stress concentration, Crack growth criteria, Mode of deformation Week 2:Stress intensity factor, Plane stress and strainStress intensity factor, Tri-axiality in plane stress and strain, Crack-tip plasticity Week 3:Size and shape of plastic zone, Fracture toughness and measurement, Classification of fracture and mechanisms Week 4:Classification of fracture and mechanisms continued, Introduction to Fatigue, Few cases of fatigue failures, SN curve, High and low cycle fatigue, Representation of fatigue data, Week 5:Fatigue crack propagation, Mechanisms of fatigue fracture, Fatigue crack closure, Fatigue design approaches Week 6:Failure in composites (Interfaces, direct/indirect strengthening, Damage evolution in fiber reinforced/particulate reinforced composites), Failure in Ceramics (Damage in ceramic matrix composites, Toughening mechanisms) Week 7:Failure in ceramics continued, Failure in Polymers Week 8:Creep: Testing, Mechanisms: Diffusional related, Dislocations related, Grain boundary sliding, Harper Dorn, Power Law, Deformation Mechanism Maps