Instructor : Asst.Prof.Dr.Turgut AKYÜREK

e-mail :

Office: L-A18

Office Telephone: 2331303

Lecture Hours : Wednesday 17:00 – 20:00 @ Balgat A209

Office Hours : Wednesday 13:20 – 14:10. Appointments are accepted.

Web site :

Course Description: 

  • Fracture Mechanics is an essential tool to evaluate whether a component is likely to fail or not. This course has been planned in a simple and step-wise manner to help students familiarise with the basic and advanced topics. Elements of Fracture Mechanics comprehensively covers: - Stress Intensity Factor - Energy Release Rate - J-Integral - Experimental techniques - Fatigue Failure - Environment assisted fracture - FEA of cracks - Mixed mode fracture - Non-destructive test methods.  

Course Objective: Aims of this course are:

  • To develop a clear understanding of principles for fracture mechanics and
  • To provide crucial information on engineering applications.

Method of Instruction: 

The instruction for ME 542 will consist of three one-hour lectures each week.  These lectures will introduce the analytical techniques and advanced mechanics concepts that were described above.  The theories will be reinforced through regular homework assignments and exams. 

Course Material: Text Book is “Elements of Fracture Mechanics”,  1st Edition, Kumar, P.,  2009.  McGraw Hill., ISBN-13 978-0-07-065696-3. 



There will be 1 mid-term examination, 1 final examination, 4 quizzes and 4 homework. 

Notes and Assignments: 

Course notes and assignments, along with additional information, will be placed on a course web page in PDF format for the student to download. Homework will be due at the beginning of the lecture on the due date, which will be shown on all homework assignments.  No late assignments will be accepted.  Missing assignments will be given a grade of zero.

All electronic material will be in pdf format.  


According to the university regulations, students must attend at least 70 % of the lecture hours. Otherwise, the student gets NA (Not attended) from the course. Valid excuses are exempt from computation of these percentages. Due to risks of Covid 19, for this semester, attandance is optional, not compulsory.

Apart from the university regulations, it is of student’s benefit to attend all of the lecture hours. 


Overall final grade will be over 1000 points. Weight of each grading item will be as below.

Progress and retention will be evaluated with homework assignments and exams.  Homework will be assigned regularly to reinforce concepts covered in lecture.  A Mid-Term Exam will be given to assess the understanding of the general elasticity components.  A Final Exam will be assigned to assess the ability to utilize the different analysis methods presented in the course.   

The course grade will compromise a weighted average of all assignments.  The specific distribution will be: 


Item Weight


Homework (4x50)


Quiz (4x50)


Mid-Term Exam


Final Exam





All the announcements, including the examination dates, will be posted on the course web site.


Reference Books:

  1. Fracture Mechanics: Fundamentals and Applications, Anderson, T.L. 3rd Edition, CRC Press Taylor & Francis Gr., 2005, ISBN: 978–1–4200–5821-5.
  2. Elementary Engineering Fracture Mechanics, Broek, D, 3rd Edition, Martinus Nijhoff Pub., 1984, ISBN: 90-247-2580-1 
  3. Practical Uses of Fracture Mechanics, Broek, D, 3rd Edition, Kluwer Academic Publishers, 1997, ISBN: 90-247-0223-0

Tentative weekly course schedule:

Chapter Subject Week
1 Background 01-02
2 Energy Release Rate 03
3 Stress Intensity Factor 04
4 Stress Intensity Factor for More Complex Cases 05
5 Inelastic Deformation at the Crack Tip 06
6 J-Integral 07
7 Crack Tip Opening Displacement 08
8 Test Methods 08-09
9 Fatigue Failure and Environment-Assisted Fracture 10-11
10 Finite Element Analysis of Cracks in Solids 11-12
11 Mixed Mode Crack Initiation and Growth 13
12 Crack Detection Through Non-Destructive Testing 14