COURSE UNIT TITLE

: FATIGUE

DEGREE PROGRAMMES

Description of Individual Course Units

Course Unit Code Course Unit Title Type Of Course D U L ECTS
MEE 5102 FATIGUE ELECTIVE 3 0 0 8

Offered By

Graduate School of Natural and Applied Sciences

Level of Course Unit

Second Cycle Programmes (Master's Degree)

Course Coordinator

PROFESSOR DOCTOR ÇINAR EMINE YENI

Offered to

Mechanics
Mechanics
Mechanics

Course Objective

The course is aimed for engineers concerned with the design and development of equipment subjected to repeated loadings and who must make decisions concerning the fatigue resistance of a structure, machine or component. Key points for successful fatigue design are mentioned as well as modern treatments of cumulative damage, or life prediction, that recognize the importance of cycle counting and sequence of events. Extensive use of example problems and case studies will be used. The overall objective of the course is for participants to gain an understanding of the phenomenon of metal fatigue and most importantly learn what methods are available to predict and prevent failures.

Learning Outcomes of the Course Unit

1   Define the fundamental concepts involved in fatigue
2   Identify the micro- and macrocharacteristics of fatigue failure
3   Differentiate various fatigue analysis methods
4   Analyze the type of loading mechanism
5   Describe methods for analyzing fatigue at notches
6   Identify factors which can adversely affect fatigue behavior
7   Apply processes which can be used to improve fatigue behavior
8   Design against fatigue failure
9   Evaluate the given data in order to design and manufacture against fatigue failure

Mode of Delivery

Face -to- Face

Prerequisites and Co-requisites

None

Recomended Optional Programme Components

None

Course Contents

Week Subject Description
1 Introduction-Fatigue as a Phenomenon in the Material
2 Characteristic Features of Fatigue Failures a) Microscopic Characteristics b) Macroscopic Characteristics
3 Total Life Approach to Design, Cyclic Stress Controlled Fatigue Stress Life Approach
4 Effect of Mean Stress on Fatigue Life, Stress Fluctuations, Cumulative Damage and Safe Life Design
5 Stress Concentration at Notches, Fatigue Strength of Notched Specimens, Neuber s Method
6 Strain Life Approach, High Cycle and Low Cycle Fatigue, Monotonic and Cyclic Stress-Strain Response
7 Cyclic Stress-Strain Behavior, Hysteresis Loop, Strain Life Equation for Both High Cycle and Low Cycle Fatigue
8 1. Midterm
9 Mean Stress Effects on Fatigue, Cumulative Fatigue Damage
10 Avoidance of Fatigue Damage, Sources of Residual Stresses, Measurement of Residual Stresses, How to Remove Residual Stresses
11 Stress Intensity Factors of Cracks and Their Application, Fatigue Crack Propagation
12 2. Midterm
13 Procedure for Constant Amplitude Fatigue Crack Growth Life Calculation, Safe-Life Approach vs. Fail-Safe Approach
14 Plane Stress-Plane Strain, Effect of Overload on Fatigue Crack Propagation

Recomended or Required Reading

Fatigue of Structures and Materials, J. Schijve, Kluwer Academic Publishers, 2009.

Mechanical Behavior of Materials , N. E. Dowling, Prentice Hall, 1993.

Deformation and Fracture Mechanics of Engineering Materials, R. W. Hertzberg, 4th Edition, John Wiley & Sons Inc., 1996.

Fracture Mechanics: Fundamentals and Applications, T. L. Anderson, 2nd Edition, CRC Press, 1995.

Planned Learning Activities and Teaching Methods

This course is taught in a lecture, class presentation, problem-session and discussion format. All students are expected to attend both the lecture and problem-session, discussion so they are also expected to solve on their own and submit homework in time. Typical applications of fatigue failures will also be handled in detail.

Assessment Methods

SORTING NUMBER SHORT CODE LONG CODE FORMULA
1 MTE 1 MIDTERM EXAM 1
2 MTE 2 MIDTERM EXAM 2
3 ASG ASSIGNMENT
4 RPT REPORT
5 FIN FINAL EXAM
6 FCG FINAL COURSE GRADE MTE 1 * 0.20 + MTE 2 * 0.20 + MAKRASG +RPT/2 * 0.20 +FIN * 0.40
7 RST RESIT
8 FCGR FINAL COURSE GRADE (RESIT) MTE 1 * 0.20 + MTE 2 * 0.20 + ASG +RPT/2 * 0.20 +RST * 0.40


Further Notes About Assessment Methods

None

Assessment Criteria

To be announced.

Language of Instruction

English

Course Policies and Rules

To be announced.

Contact Details for the Lecturer(s)

Prof. Dr. Çınar YENI
cinar.yeni@deu.edu.tr
Dokuz Eylül University, Faculty of Engineering, Department of Mechanical Engineering
Phone: 0 232 3019209

Office Hours

The lecturer will inform her suitable office hours on her weekly schedule on the office door.

Work Placement(s)

None

Workload Calculation

Activities Number Time (hours) Total Work Load (hours)
Lectures 12 3 36
Preparations before/after weekly lectures 12 5 60
Preparation for midterm exam 2 15 30
Preparation for final exam 1 20 20
Preparing assignments 2 15 30
Preparing presentations 1 15 15
Final 1 3 3
Midterm 2 3 6
TOTAL WORKLOAD (hours) 200

Contribution of Learning Outcomes to Programme Outcomes

PO/LOPO.1PO.2PO.3PO.4PO.5PO.6PO.7PO.8PO.9PO.10PO.11PO.12PO.13PO.14
LO.1221313
LO.2311222
LO.33342521211
LO.4122252212
LO.53211322
LO.6232231422
LO.7324451411
LO.85255422422
LO.951134522

CONTACT INFORMATION
Dokuz Eylül Üniversitesi Cumhuriyet Bulvarı No: 144 35210 Alsancak / İZMİR
Phone: +90(232) 412 12 12 - Fax: +90 (232) 464 81 35

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