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Course Detail

Course Name Fracture Mechanics
Course Code 15MEC235
Program B. Tech. in Mechanical Engineering
Year Taught 2019


Unit 1

Introduction to Fracture Mechanics: Failures in structures – types and causes, historical perspective, fracture mechanics approach to design -energy criterion, stress intensity approach, time dependent crack growth and damage tolerance, effect of material properties on fracture.

Linear Elastic Fracture Mechanics (LFEM): Stress concentration effect of flaws, Griffith energy balance, the energy release rate, instability and resistance curve(Rcurve), stress analysis of cracks, relationship between stress intensity factor and energy release rate (K and G), crack tip plasticity, mixed mode crack initiation and propagation.

Unit 2

Elastic Plastic Fracture Mechanics (EPFM): Crack-Tip-Opening Displacement (CTOD), the J contour integral and its determination, relationships between J and CTOD, crack-growth resistance curves, J-controlled fracture.

Fracture mechanism in metals and non-metals: Ductile fracture, cleavage, the ductile-brittle transition, intergranular fracture, fracture in polymeric materials, and fracture in ceramic and ceramic composites.

Unit 3

Applications: Introduction to fracture toughness testing of metals and non-metals for determination of fracture parameters, Application of fracture mechanics concepts in the analysis of fatigue crack growth.

Computational fracture mechanics: Overview of numerical methods for fracture mechanics problems, traditional methods in computational fracture mechanics – point matching and energy methods, the energy domain integral, finite element implementation, design of finite element mesh, linear elastic convergence study, analysis of growing cracks.

Text Books

  • Anderson T. L. – ‘Fracture Mechanics: Fundamentals and Applications’ – CRC Press – 2012 – 5th Edition



  • Ramesh K. – ‘E-book on Engineering Fracture Mechanics’ – IIT Madras – 2006
  • Janssen M., Zuidema and Wanhill R. J. H. – ‘Fracture Mechanics’ – VSSD (Delft University of Technology) – 2006 – 2nd Edition
  • Kumar P. – ‘Elements of Fracture Mechanics’ – Wheeler Publishing – 1999
  • Dahlberg T. and Ekberg S. – ‘Failure Fracture Fatigue: An Introduction’ – Overseas Press (India) – 2006
  • Suresh S. – ‘Fatigue of Materials’ – Cambridge University Press – 1998 – 2nd Edition

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