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Course Co-ordinated by IIT Madras
Coordinators
 
Prof. K. Ramesh
IIT Madras

 

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The course covers the basic aspects of Engineering Fracture Mechanics. Spectacular failures that triggered the birth of fracture mechanics, Modes of loading, Classification as LEFM and EPFM, Crack growth and fracture mechanisms, Energy release rate, Resistance, Griffith Theory of fracture, Extension of Griffith Theory by Irwin and Orowan, R-Curve, Pop-in phenomena, Crack branching. Necessary and sufficient conditions for fracture, Stress and Displacement fields in the very near and near-tip fields, Westergaard, Williams and Generalised Westergaard solutions, Influence of the T-stress and higher order terms, Role of photoelasticity on the development of stress field equations in fracture mechanics, Equivalence between SIF and G, Various methods for evaluating Stress Intensity Factors, Modeling plastic zone at the crack-tip, Irwin and Dugdale models, Fracture toughness testing, Fedderson‚€TMs residual strength diagram, Paris law, J-integral, HRR field, Mixed-mode fracture, Crack arrest methodologies.


Modules

Topics

1

EFM Course outline and Spectacular Failures

2

Introduction to LEFM and EPFM, Fatigue Crack Growth Model

3

Crack Growth and Fracture Mechanisms, Griffith TMs Theory of Fracture

4

Energy Release Rate

5

Review of Theory of Elasticity

6

Westergaard Solution for Stress and Displacements for Mode I, Relationship between K and G

7

Introduction to multi parameter stress field for Mode I, Mode II and Mixed Modes

8

SIF for Various Geometries

9

Modeling Plastic Deformation, Irwin‚€TMs model, Dugdale Model

10

Fracture Toughness Testing, Paris Law and Sigmoidal curve

11

Crack Closure, Crack Growth Models, J-Integral

12

Failure Assessment Diagram, Mixed Mode Fracture, Crack Arrest and Repair Methodologies
  • Strength of Materials

  • Theory of Elasticity (Desirable).


  1. K. Ramesh, e-Book on Engineering Fracture Mechanics, IIT Madras, 2007. URL: http://apm.iitm.ac.in/smlab/kramesh/book_4.htm

  2. Prashant Kumar, Elements of Fracture Mechanics, Tata McGraw Hill, New Delhi, India, 2009.

  3. K. R.Y. Simha, Fracture Mechanics for Modern Engineering Design, Universities Press (India) Limited, 2001

  4. D. Broek, Elementary Engineering Fracture Mechanics, Kluwer Academic Publishers, Dordrecht, 1986.

  5. T.L. Anderson, Fracture Mechanics - Fundamentals and Applications, 3rd Edition, Taylor and Francis Group, 2005.


Articles from the journals:

  • Engineering Fracture Mechanics

  • International Journal of Fracture

  • Experimental Mechanics

  • Journal of Mechanics and Physics of Solids

  • Journal of Applied Mechanics

  • Strain

  • Journal of Strain Analysis for Engineering Analysis and

  • Design, Engineering Failure Analysis etc.



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