| Course Name | Engineering Fracture Mechanics |
| Course Code | 23AEE432 |
| Program | B. Tech. in Aerospace Engineering |
| Credits | 3 |
| Campus | Coimbatore |
Introduction to Linear and Elasto-plastic fracture mechanics (FM), historical development of FM, modes of fracture, crack growth mechanisms, brittle and ductile fracture behaviour. study on energy release rate (G), derivation of ‘G’ on Double cantilever beam, Energy release rate derivation on different modes of failure, Necessary and sufficient conditions of FM and stable and unstable fracture mechanisms.
Introduction to stress to intensity factor, K, (SIF)– Cauchy- Riemann conditions, Westergaard’s stress function, stress intensity factors derivations for different failure modes. Determination of crack-tip stresses and displacement field, principal of superposition – study on K and G relation. SIF of surface and embedded cracks.
Determination of Crack Opening Displacement (CTOD/COD). Energy release rate by J-integral approach, Evaluation of failure energy by numerical approach. Study on different fracture toughness tests: plane strain test, Compact tension test, three-point bending test, C-specimen test, Chevron notch test.
Requisite(s): 23AEExxx MECHANICS OF MATERIALS & 23AEExxx AEROSPACE STRUCTURES-I
Course Objectives
Introduce the physical and mathematical principles of linear and nonlinear fracture mechanics and their applications in wide range of engineering design using energy release rate and stress intensity approaches.
Course Outcomes
CO1: Illustrate the types of fractures with characteristic features and different growth mechanisms.
CO2: Understanding the principles of energy release rate and determining the energy release rate on different failure modes.
CO3: Determination of stress intensity factor (SIF) for plane, surface and embedded cracks under various types of loads.
CO4: Study of J-Integral approach to determine fracture energy and introduction to CTOD method.
CO5: Identifying the various testing procedures to determine fracture toughness.
CO-PO Mapping
| PO/PSO | PO1 | PO2 | PO3 | PO4 | PO5 | PO6 | PO7 | PO8 | PO9 | PO10 | PO11 | PO12 | PSO1 | PSO2 | PSO3 |
| CO | |||||||||||||||
| CO1 | 1 | 2 | – | – | – | 1 | – | – | – | – | – | – | – | 1 | – |
| CO2 | 2 | 2 | 2 | 1 | – | – | – | – | – | – | – | 1 | 2 | 1 | – |
| CO3 | 2 | 2 | 2 | 1 | – | – | – | – | – | – | – | 1 | 2 | 1 | – |
| CO4 | 2 | 2 | 2 | 1 | 2 | – | – | – | – | – | – | 1 | 2 | 1 | 1 |
| CO5 | – | 1 | 1 | – | 2 | – | – | – | – | – | – | 1 | – | 2 | 1 |
| Assessment | Internal | End Semester |
| Midterm Exam | 30 | |
| *Continuous Assessment (CA) | 30 | |
| End Semester | 40 |
*CA – Can be Quizzes, Assignment, Projects, and Reports
Text Book(s)
Anderson, T.L., “Fracture Mechanics”, Fourth Edition, CRC Press, 2017.
Reference(s)
Ramesh, K., “e-book on Engineering Fracture Mechanics”, IIT-Madras, 2007.
Prashant Kumar, “Elements of Fracture Mechanics” Tata McGraw-Hill Education, 2009.
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