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’s residual strength diagram, Paris law, J-integral, HRR field, Mixed-mode fracture, Crack arrest methodologies.

Other Resources

Course Curriculum

Mod-01 Lec-01 EFM Course Outline Details 48:59
Mod-01 Lec-02 Spectacular Failures Details 48:54
Mod-01 Lec-03 Lessons from Spectacular Failures Details 50:28
Mod-01 Lec-04 LEFM and EPFM Details 49:52
Mod-01 Lec-05 Fracture Mechanics is Holistic Details 51:30
Mod-01 Lec-06 Fatigue Crack Growth Model Details 50:23
Mod-01 Lec-07 Crack Growth and Fracture Mechanisms Details 53:3
Mod-02 Lec-08 Elastic Strain Energy Details 48:16
Mod-02 Lec-09 Fracture Strength by Griffith Details 50:26
Mod-02 Lec-10 Energy Release Rate Details 50:48
Mod-02 Lec-11 Utility of Energy Release Rate Details 52:46
Mod-02 Lec-12 Pop-in Phenomenon Details 51:29
Mod-03 Lec-13 Displacement and Stress Formulations Details 51:25
Mod-03 Lec-14 Forms of Stress Functions Details 52:40
Mod-04 Lec-15 Airy’s Stress Function for Mode-I Details 51:49
Mod-04 Lec-16 Westergaard Solution of Stress Field for Mode-I Details 51:53
Mod-04 Lec-17 Displacement Field for Mode-I Details 51:14
Mod-04 Lec-18 Relation between KI and GI Details 53:20
Mod-04 Lec-19 Stress Field in Mode-II Details 51:1
Mod-04 Lec-20 Generalised Westergaard Approach Details 53:14
Mod-04 Lec-21 William’s Eigen Function Approach Details 46:25
Mod-04 Lec-22 Multi-parameter Stress Field Equations Details 51:28
Mod-04 Lec-23 Validation of Multi-parameter Field Equations Details 47:1
Mod-05 Lec-24 Discussion Session-I Details 54:29
Mod-06 Lec-25 Evaluation of SIF for Various Geometries Details 49:20
Mod-06 Lec-26 SIF for Embedded Cracks Details 47:22
Mod-06 Lec-27 SIF for Surface Cracks Details 0:53
Mod-06 Lec-28 Modeling of Plastic Deformation Details 53:1
Mod-06 Lec-29 Irwin’s Model Details 52:29
Mod-06 Lec-30 Dugdale Model Details 52:58
Mod-06 Lec-31 Fracture Toughness Testing Details 52:48
Mod-06 Lec-32 Plane Strain Fracture Toughness Testing Details 50:43
Mod-06 Lec-33 Plane Stress Fracture Toughness Testing Details 51:33
Mod-07 Lec-34 Paris Law and Sigmoidal Curve Details 51:12
Mod-07 Lec-35 Crack Closure Details 51:17
Mod-07 Lec-36 Crack Growth Models Details 52:51
Mod-08 Lec-37 J-Integral Details 54:19
Mod-08 Lec-38 HRR Field and CTOD Details 52:51
Mod-08 Lec-39 FAD and Mixed Mode Fracture Details 0:52
Mod-08 Lec-40 Crack Arrest and Repair Methodologies Details 53:6
Mod-09 Lec-41 Discussion Session – II Details 59:3

This course is part of NPTEL online courses, delivered by IIT Madras.

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