Fracture Mechanics

Course Name: 

MF 817 Fracture Mechanics

Programme: 

M.Tech (Manufacturing Engineering)

Semester: 

Second

Category: 

Elective Courses (Ele)

Credits (L-T-P): 

(3-0-0) 3

Content: 

History of failure by Fracture; failure of structures, bridges, pressure vessels and ships, brittle fracture, development of testing for failure, identification of reasons for failure, existence of crack, Griffith crack and experiment, energy release rate and stress for failure in presence of crack. Stress Field around Crack Tip; revision of theory of elasticity, conformal mapping, Airy’s stress function for crack tip stress field with crack emanating from straight boundary, stress state in crack tip vicinity, modes of crack face deformation, stress intensity factor and Irwin’s failure criterion, fracture toughness. Determination of Stress Intensity Factor, different specimen configuration, numerical techniques- boundary collocation and boundary integral, finite element method, experimental method- reflection and refraction polariscopy, Determination of fracture toughness. Energy Consideration; potential energy, surface energy, plastic deformation around crack tip, energy release rate, compliance and correlation with fracture toughness, crack opening displacement (COD), COD as fracture criterion, experimental determination of COD, use of fracture toughness and COD as design criteria. Crack Propagation; law of fatigue crack propagation, life calculation when a crack is present and loaded, microscopic aspects of crack propagation, elastic crack and plastic relaxation at crack tip.

References: 

Engineering Fracture Mechanics -S.A Meguid Elsevier & Karen Heltan, introduction to fracture mechanics , Mc Graw hill S.A Meguid , Engineering fracture Mechanics Elsevier Publications Karen Hettan, Introducation to Fracture Mechanics, Mcgraw Hill Publications Anderson, Fracture Mechanics-Fundamentals and Applications, . T.L CRC Press 1998 David Brock, Elementary Engineering Fracture Mechanics Noordhoff

Department: 

Mechanical Engineering
 

Contact us

Dr. Narendranath S, Professor and Head
Department of Mechanical Engineering, NITK, Surathkal
P. O. Srinivasnagar, Mangalore - 575 025
Karnataka, India.

  • Hot line: +91-0824-2473049

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