JNTUK B.Tech Fracture Mechanics gives you detail information of Fracture Mechanics R13 syllabus It will be help full to understand you complete curriculum of the year.
(Course Objective: To provide a comprehensive coverage on fundamental concepts of fracture mechanics. He should clearly understand the mechanisms of Griffith theory, LEFM, EPF and failure of forging, castings and weldments. The student should be able to identify the reasons for failure of various components during applications)
UNIT-I : (Learning Objectives: To understand the basic concepts of failure modes, ductile-brittle transition and about the fracture at elevated temperature)
Introduction: Prediction of mechanical failure. Macroscopic failure modes; brittle and ductile behaviour. Fracture in brittle and ductile materials – characteristics of fracture surfaces; inter-granular and intra-granular failure, cleavage and micro-ductility, growth of fatigue cracks, The ductile/brittle fracture transition temperature for notched and unnotched components. Fracture at elevated temperature.
UNIT-II : (Learning Objectives: To know the concepts relevant to G, R and R-curves)
Griffiths analysis: Concept of energy release rate, G, and fracture energy, R. Modification for ductile materials, loading conditions. Concept of R curves.
UNIT-III : (Learning Objectives: To know the mechanism of LEFM. He should clearly understand various terms pertaining to LEFM)
Linear Elastic Fracture Mechanics (LEFM): Three loading modes and the state of stress ahead of the crack tip, stress concentration factor, stress intensity factor and the material parameter the critical stress intensity factor, crack tip plasticity, effect of thickness on fracture toughness.
UNIT-IV : (Learning Objectives: To know the mechanism of EPFM. He should clearly understand various terms pertaining to EPFM)
Elastic-Plastic Fracture Mechanics; (EPFM). The definition of alternative
failure prediction parameters, Crack Tip Opening Displacement, and the J integral. Measurement of parameters and examples of use.
UNIT-V : (Learning Objectives: To be able to analyze the causes for failures in various castings, forgings and weldments) Failure Of Forging, Casting And Weldments Causes of Failure in Forging like material characteristics, Deficiencies in design, Improper Processing / Fabrication or Deterioration resulting from service conditions, Failure of Iron and Steel Castings, effect of Surface Discontinuities, Internal Discontinuities, Microstructure, Improper Composition, Improper Heat Treatment, Stress Concentration and Service Conditions. Failure of Weldments – Reasons for Failure procedure for Weld Failure Analysis.
UNIT-VI : (Learning Objectives: To understand the reliability concept and other functions associated with the reliability concept) Reliability : Reliability Concept and Hazard Function, Life Prediction, Condition Monitoring, Application of Poisson. Exponential and Weibull Distribution for Reliability, Bath Rub Curve, Parallel and Series System, Mean Time Between Failures and Life Testing.
(Course outcomes: The student should be able to
- understand the failure of the products manufactured through various processes and suggest remedial methods
- understand linear elastic fracture mechanics and elastic plastic fracture mechanics theories and apply them for fatigue studies
- estimate reliability of the system and sensitivity of process parameters on quality of the product. )
(Assessment: The student should be evaluated based on the assignments and objective tests. Emphasis should be given by conducting tutorial classes (With a focus on academically weak students) at the end of each unit. )
TEXT BOOKS
- Dislocations and Mechanical Behaviour of Materials – M. N. Shetty, PHI
- T.L. Anderson, Fracture Mechanics Fundamentals and Applications, 2nd Ed. CRC press, (1995)
REFERENCES
- B. Lawn, Fracture of Brittle Solids, Cambridge Solid State Science Series 2nd ed1993.
- J.F. Knott, Fundamentals of Fracture Mechanics, Butterworths (1973)
- J.F. Knott, P Withey, Worked examples in Fracture Mechanics, Institute of Materials.
- H.L.Ewald and R.J.H. Wanhill Fracture Mechanics, Edward Arnold, (1984).
- S. Suresh, Fatigue of Materials, Cambridge University Press, (1998)
- L.B. Freund and S. Suresh, Thin Film Materials Cambridge University Press,(2003).
- G. E. Dieter, Mechanical Metallurgy, McGraw Hill, (1988)
- D.C. Stouffer and L.T. Dame, Inelastic Deformation of Metals, Wiley (1996)
- F.R.N. Nabarro, H.L. deVilliers, The Physics of Creep, Taylor and Francis, (1995)
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