| Course Unit Title | Course Unit Code | Type of Course Unit | Level of Course Unit | Year of Study | Semester | ECTS Credits |
|---|---|---|---|---|---|---|
| Fracture Mechanics | MMK604 | Elective | Doctorate degree | 1 | Spring | 10 |
Name of Lecturer(s)
Assistant Prof. Dr. Şenol ŞAHİN
Learning Outcomes of the Course Unit
1) Perform analysis on structures using theory of fracture mechanics.
2) Perform crack propagation analysis using Paris law.
3) Describe experimental methods commonly used to determine fracture properties.
4) Evaluate experimental results from material tests.
5) Point out risk factors for fracture.
6) Have a broad understanding on failure analysis and prevention.
Program Competencies-Learning Outcomes Relation
| Program Competencies | ||||||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | ||
| Learning Outcomes | ||||||||||||||
| 1 | High | No relation | Middle | Low | Middle | Low | Low | High | Low | No relation | Low | No relation | No relation | |
| 2 | High | No relation | Middle | Low | Middle | Low | Low | High | Low | No relation | Low | No relation | No relation | |
| 3 | High | No relation | Middle | Low | Middle | Low | Low | High | Low | No relation | Low | No relation | No relation | |
| 4 | High | No relation | Middle | Low | Middle | Low | Low | High | Low | No relation | Low | No relation | No relation | |
| 5 | High | No relation | Middle | Low | Middle | Low | Low | High | Low | No relation | Low | No relation | No relation | |
| 6 | High | No relation | Middle | Low | Middle | Low | Low | High | Low | No relation | Low | No relation | No relation | |
Mode of Delivery
Face to Face
Prerequisites and Co-Requisites
None
Recommended Optional Programme Components
Stregth of Matarials I & Stregth of Matarials II, Theory od Elasticity.
Course Contents
FRACTURE MECHANICS AND GENERAL CONCEPTS, LOADING TYPES, FRACTURE MECHANICS, HISTORICAL FRACTURE MECHANICS, THEORETICAL STRENGTH OF MATERIALS, STRESS CONCENTRATION, MICRO CRACKS AND GRIFFITH’S MODEL, CONCLUSIONS, LINEAR ELASTIC FRACTURE MECHANICS, ENERGY BALANCE APPROACH, STRESS INTENSITY FACTOR APPROACH, THE RELATION BETWEEN (G) AND (K), CONCLUSIONS; Elasto-PLASTICS FRACTURE MECHANICS, CRACK TIP FRACTURE ZONE, CALCULATION OF CRACK TIP FRACTURE ZONE, THICKNESS EFFECTS, PLANE STRESS – PLANE STRAIN, FRACTURE TOUGHNESS TESTS, ELASTO – PLASTIC FRACTURE TOUGHNESS TESTS, (CTOD) METHOD, (J) INTEGRAL, (R) CURVE , STATIC FRACTURE TOUGHNESS TESTS, STANDARD JIC TEST, THREE POINT BENDING TEST, COMPACT TENSION TEST, DOUBLE CANTILEVER BEAM TEST, DYNAMIC FRACTURE, DYNAMIC ENERGY BALANCE, NOTCHED IMPACT TESTS, INSTRUMENTED CHARPY IMPACT TESTS, Crack Arrest Test, CRACK PROPAGATION MECHANISMS, INTRODUCTION, EXAMINATION TECHNIQUES, MACROSCOPIC EXAMINATION, MICROSCOPIC EXAMINATION, Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM), FATIGUE, GENERAL TERMINOLOGY, FACTORS PROMOTING FATIGUE CRACK PROPAGATION, APPLICATION OF FRACTURE MECHANICS TO FATIGUE CRACK PROPAGATION, ENVIRONMENTAL EFFECTS AND STRESS CORROSION CRACKING, CREEP, CREEP CURVE, CREEP TESTS, PROBLEMS
Weekly Schedule
1) This course provides candidates with profound knowledge on fracture mechanics and general concepts, loading types, theoretical strength of materials.2) Stress concentration, micro cracks and Griffith’s model, linear elastic fracture mechanics,
3) Energy balance approach, stress intensity factor approach, relation between (G) and (K), elasto-plastics fracture mechanics, crack tip fracture zone, Calculation of crack tip fracture zone,
4) Thickness effects, plane stress – plane strain, fracture toughness tests, Plane strain fracture toughness, Specimen dimensions, KIC test procedure, Force-displacement analysis and calculation of KIC, (Homework subject is given / Homework Mid-term Exam Week is delivered).
5) Elasto – plastic fracture toughness tests, (CTOD) method, (J) integral, (R) curve, (Presentation Subject is given / Presentations are submitted starting from the Tenth Lesson Week).
6) static fracture toughness tests, standard jic test, Three point bending test, Compact tension test, double cantilever beam test,
7) Dynamic fracture, dynamic energy balance, notched impact tests, instrumented charpy impact tests, crack arrest test,
8) Midterm exam. (Homework Mid-term Exam Week is delivered /The Project Subject is given / The project is delivered in the thirteenth week of the lessons).
9) Crack propagation mechanisms, examination techniques,
10) Examination techniques, macroscopic examination, microscopic examination, transmission electron microscopy (TEM), scanning electron microscopy (SEM),
11) Fatigue, general terminology, factors promoting fatigue crack propagation, (Presentations are submitted starting from the Tenth Lesson Week).
12) Application of fracture mechanics to fatigue crack propagation,
13) Environmental effects and stress corrosion cracking,
14) Creep, creep curve, (The project is delivered in the thirteenth week of the lessons).
15) Creep tests,
16) Final Exam
Recommended or Required Reading
1- Prof. Dr. Paşa YAYLA, Kırılma Mekaniği, Çağlayan Kitabevi, ISBN: 97-8975-43607-07.
2- Klaus FRIEDRICH, Application of Fracture Mechanics to Composite Materials: Volume 6, Elsevier, 1989.
3- Prof. Dr. İ. Barlas. ERYÜREK, Hasar Analizi, Birsen Yayınları, 1993
4- J. G. WILLIAMS, Fracture Mechanisc of Polymers, ISBN: 978-0470200131
5- T. L. Anderson, Kırılma Mekaniği Esaslar ve Uygulamalar, Çevirenler Prof. Dr. Barlas Eryürek ve Yük. Mak. Müh. Ethem Akınay, OTYEV Yayını, 2014, ISBN: 978-605-61001-2-3
Planned Learning Activities and Teaching Methods
1) Lecture
2) Drill and Practice
3) Group Study
4) Simulation
5) Self Study
6) Problem Solving
7) Project Based Learning
Assessment Methods and Criteria
Contribution of Semester Studies to Course Grade |
30% |
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Contribution of Final Examination to Course Grade |
70% |
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Total | 100% | |||||||||||||||||
Language of Instruction
Turkish
Work Placement(s)
Not Required