JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objectives:

• Gain an understanding of fundamentals of fracture mechanics, Griffith crack theory.
• Analyze the crack behavior in various conditions.
• Obtain a working knowledge of failure analysis.

Course Outcomes

At the end of the course the student will be able to:

• Apply the knowledge of fracture mechanics under various conditions.
• Awareness about crack formation and crack growth in materials under various conditions.
• Able to analyze and take remedial steps in case of failure by fracture.

UNIT - I

Introduction to fracture mechanics: Fracture criteria, theoretical strength, stress-concentration factor, Griffith crack theory, strain-energy release rate.

UNIT - II

Mechanism of fracture: introduction, cleavage fracture, ductile fracture, fatigue cracking, environment assisted cracking, evaluation of fracture toughness. Introduction to LEFM: Concept, analysis of simple crack problems, nucleation and propagation of cracks, correlation between microstructure and fracture behaviour in different materials.

UNIT - III

Crack behaviour in elastic-plastic materials, effect of strain rate, environment, temperature, and irradiation on fracture behaviour of materials. Application of fracture mechanics to material selections, alloy design, and design of structures.

UNIT - IV

Conventional approach to fatigue crack growth in reactive environment, static and cyclic loading.

UNIT - V

Failure analysis: failure analysis methodology, failure types and characteristics, and concept of failure mechanism. Tools and techniques of failure analysis, case studies: in-process failure and service failure conditions.

TEXT BOOKS:

• 1. Fracture Mechanics: Fundamentals and Applications, T. L. Anderson, CRC Press, Inc., 1995.
• 2. Fracture and Fatigue Control in Structures, S.T. Rolfe and J.M. Barsom, Prentice-Hall, 1972.
• 3. Case Histories in Failure analysis, ASM, Ohio, 1979.

REFERENCE BOOKS:

• 1. ASM Handbook: Fatigue and Fracture, S. R. Lampman, (Rechnical Ed.) ASM International, 1996.
• 2. Elementary Engineering Fracture Mechanics, David Broek, Scjtoff & Noordhoff, 1978.
• 3. Failure analysis- R W Hertzberg, Deformation of Fracture Mechanics of Engineering Materials- John Wiley& Sons publications (1995).