FATIGUE IN MATERIALS AND STRUCTURES

SAP503

Course Code: SAP503
Semester: -
Theory+Practice: 3 + 0
ECTS: 10

Course Type

Elective Course

Course Level

Master's Degree With Thesis

Year of Study

Semester

ECTS

Name of Lecturer(s)

Instructor Murat Kandaz

Learning Outcomes

At the end of this course, the students;

Learns the types and mechanisms of fatigue, how and through which stages it occurs, and how it varies.
Learns design approaches and methods against fatigue, how the related physical phenomena can be quantified with what level of accuracy and precision.
Learns the effects of notches, multi-axial factors, environmental factors, welding and connections, residual stresses, and crack size on fatigue.
Learns the design requirements and methods regarding the similarities and differences in components and structures created with metal-composite-ceramic-polymer materials in the context of fatigue.
Learns about related studies on digitization and innovative approaches regarding fatigue.

Mode of Delivery

Face to face

Prerequisites

Recommended Optional Programme Components

None

Course Description

Introduction to fatigue, history, fatigue at macro-meso-micro levels and related effects, design criteria and methods, fatigue tests, fidelity and sensitivity of stress-life and strain-life approaches, accuracy and precision analyses with the fracture mechanics approach, test methods, fracture mechanics approach, variable amplitude loading and quantification techniques, nonlinear and/or time-dependent fatigue, general thermomechanical fatigue and its characteristics, material modeling, notch effects and multiaxial stress and fatigue models, fretting fatigue, effects of contacts, corrosion fatigue, thermal fatigue models at low and high temperatures, fatigue in welded regions, fatigue in various connection types, measurement and quantification techniques related to residual stresses, corrections and methods for small/short cracks, relevant fatigue types and mechanisms encountered in composite/ceramic/plastic materials and corresponding design methods, morphological investigations, fractographs, and case analyses.

Course Contents

WEEK	TOPICS
1^st Week	Course plan and rules, introduction to fatigue
2^nd Week	Fatigue at macro-meso-micro levels, design criteria
3^rd Week	Fatigue tests, stress-life approach and methods
4^th Week	Cyclic deformation, strain-life approach and methods
5^th Week	Fracture mechanics approach
6^th Week	Variable amplitude loadings
7^th Week	Nonlinear / time-dependent fatigue analyses and advanced theories
8^th Week	MIDTERM
9^th Week	Examination of notch effects and other 3D effects
10^th Week	Environmental factors, fatigue in welds and connections
11^th Week	Residual stress analyses, small/short crack analyses
12^th Week	Fatigue in composite materials
13^th Week	Fatigue in ceramics and polymers
14^th Week	Various case studies, future trends, and innovative approaches
15^th Week
16^th Week
17^th Week
18^th Week
19^th Week
20^th Week

Recommended or Required Reading

Cisilino, A., 2000, Linear and Nonlinear Crack Growth using Boundary Elements, WIT Press, Southampton, UK.
Gdoutos, E.E., 1993, Fracture Mechanics: An Introduction, Kluwer Academic Publishers, Dordrecht, The Netherlands.
Gdoutos, E.E., 1990, Fracture Mechanics Criteria and Applications, Kluwer Academic Publishers, Dordrecht, The Netherlands.
Hertzberg, R.W., 1996, Deformation and Fracture Mechanics of Engineering Materials, John Wiley and Sons, Inc., Hoboken, NJ, USA.
Janssen, M., Zuidema, J. and Wanhill, R., 2004, Fracture Mechanics, 2nd Edition, Spon Press, New York, USA.
Kanninen, M.F. and Popelar C.H., 1985, Advanced Fracture Mechanics, Oxford University Press, New York, NY, USA.
Kundu, T., 2008, Fundamentals of Fracture Mechanics, CRC Press, Boca Raton, FL, USA.
Lawn, B., 1995, Fracture of Brittle Solids, Cambridge University Press, Cambridge, UK.
Schijve, J., 2001, Fatigue of Structures and Materials, Kluwer Academic Publishers, Dordrecht, The Netherlands.
Shukla, A., 2005, Practical Fracture Mechanics in Design, Marcel Dekker, New York, USA.

Planned Learning Activities and Teaching Methods

Lecture
Questions/Answers
Problem Solving

Assessment Methods and Criteria

	Quantity	Percentage (%)
Mid-term	1	25
Project	1	35
Total(%)		60
Contribution of In-term Studies to Overall Grade(%)		60
Contribution of Final Examination to Overall Grade(%)		40
Total(%)		100

ECTS Allocated Based on Student Workload

Activities	Quantity	Duration (Hour)	Total Workload (Hour)
Midterm exam	1	2	2
Preparation for Quiz	0	0	0
Individual or group work	14	6	84
Preparation for Final exam	1	84	84
Course hours	14	3	42
Preparation for Midterm exam	1	36	36
Laboratory (including preparation)	0	0	0
Final exam	1	2	2
Homework	0	0	0
Project	1	52	52
Quiz	0	0	0
Total Work Load			302
Total Work Load / 30 (h)			10.06
ECTS Credit of the Course			10

Language of Instruction

Turkish

Work Placement(s)

Programme Qualifications / Learning Outcomes

	LO1	LO2	LO3	LO4	LO5
K1
K2	X	X
K3
K4
K5
K6
K7
K8
K9
K10	X		X	X
K11