Engineering fracture mechanics

Start Date
24/07/2017

End Date
13/10/2017

No. of
Enrollments
97 students

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syllabus uploaded

Created by

Ramesh K.
IIT Madras
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Course Language
English
Course Type
Scheduled
Video transcripts
English
Course Category
Engineering
Learning Path
Undergraduate
Course Length
48 Hours
Weekly time commitments
90 Hours
Course Completion
Yes, after passing all tests.
Exam Date
To be announced
Credits
0

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Weekly Reading list

Overview

About the course

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.
 

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Intended Audience
Students in Engineering Colleges and working professionals in similar areas

Core/Elective: Core/Elective

Pre-requisites
Basic course on Strength of Materials. Course on Theory of Elasticity desirable

UG/PG: Both

Industry Support :HAL, Honeywell, GE, GM, NAL, DMRL, DRDO, BEML, Mahindra&Mahindra, Tata Motors, L&T, VSSC, Defense and Atomic energy Laboratories

Course layout

Week 1: EFM Course outline and Spectacular Failures

Week 2: Introduction to LEFM and EPFM, Fatigue Crack Growth Model
Week 3: Crack Growth and Fracture Mechanisms, Griffith TMs Theory of Fracture
Week 4: Energy Release Rate
Week 5: Review of Theory of Elasticity 
Week 6: Westergaard Solution for Stress and Displacements for Mode I, Relationship between K and G
Week 7: Introduction to multi parameter stress field for Mode I, Mode II and Mixed Modes
Week 8: SIF for Various Geometries
Week 9: Modeling Plastic Deformation, Irwin TMs model, Dugdale Model
Week 10:Fracture Toughness Testing, Paris Law and Sigmoidal curve
Week 11:Crack Closure, Crack Growth Models, J-Integral
Week 12: Failure Assessment Diagram, Mixed Mode Fracture, Crack Arrest and Repair Methodologies 


Suggested  Reading:

1. K. Ramesh, e-Book on Engineering Fracture Mechanics, IIT Madras, 2007. Visit Page
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.

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Faculty

Ramesh K.


Prof. K. Ramesh is currently a Senior Professor at the Department of Applied Mechanics,IIT Madras; as its Chairman during (2005-2009) and formerly a Professor at the Department of Mechanical Engineering, IIT Kanpur. He received his undergraduate degree in Mechanical Engineering from the Regional Engineering College, Trichy (now NIT, Trichy), Postgraduate degree from the Indian Institute of Science, Bangalore and the Doctoral Degree from the Indian Institute of Technology Madras.

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