JNTUK B.Tech Fatigue and Fracture Mechanics gives you detail information of Fatigue and Fracture Mechanics R13 syllabus It will be help full to understand you complete curriculum of the year.
Course Objectives
- To provide an understanding of fundamental principles and assumptions, and to give a basis for analysis and evaluation of structures from a fracture mechanics point of view.
- Also students will be explored to fatigue, creep deformation, creep-fatigue interactions.
UNIT – I – Fatigue Of Structures : S-N Curves – Endurance limit – Effect of mean stress – Notches and stress concentrations – Neuber’s stress concentration factors – Plastic stress concentration factor – Notched S-N curves.
DESIGN OF COMPONENTS : Goodman, Gerber and Soderberg relations and diagrams – Modified Goodman Diagram – Design of components subjected to axial, bending, torsion loads and combination of them.
UNIT – II UNIT – V – Stress Analysis :- Statistical Aspects Of Fatigue Behaviour : Low cycle and high cycle fatigue – Coffin – Manson’s relation – Transition life – Cyclic strain hardening and softening.
LOAD ASPECTS : Analysis of load histories – Cycle counting techniques – Cumulative damage – Miner’s theory – Other theories.
UNIT – III – Physical Aspects Of Fatigue : Phase in fatigue life – Crack initiation – Crack growth – Final fracture – Dislocations – Fatigue fracture surfaces.
UNIT – IV – Fracture Mechanics : Strength of cracked bodies – Potential energy and surface energy – Griffith’s theory – Irwin-Orwin extension of Griffith’s theory to ductile materials. Stress analysis of cracked bodies – Effect of thickness on fracture toughness – Stress intensity factors for typical geometries. Introduction of finite element approach for crack propagation studies.
UNIT – VI – Fatigue Design and Testing : Safe life and fail-safe design philosophies – Importance of fracture mechanics in aerospace structure – Application to composite materials structures.
TEXT BOOK
- Knott, J.F., Fundamentals of Fracture Mechanics, Butter Worth & Co., (Publishers) Ltd., London, 1983.
REFERENCE BOOKS
- Barrois, W., and Ripley, E.L., Fatigue of Aircraft Structures, Pergamon Pres., Oxford, 1983.
- Sih, C.G., Mechanics of Fracture, Vol. I, Sijthoff and Noordhoff International Publishing Co., Netherlands, 1989.
- “Mechanical Engineering Design” by J E Shigley.
Course outcomes
- After completion of this course students will acquire the knowledge for applying fracture mechanics theory
- To calculate stress areas and the ”energy release rate” around crack tips and crack growth due to fatigue.
- To develop the theory of fracture by different postulator- Griffith’s theory and fracture toughness etc.
- Understand the concepts of elastic-plastic functional machines (EPFM) theorems
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