COURSE UNIT TITLE

: FRACTURE MECHANICS OF MARINE COMPOSITES

DEGREE PROGRAMMES

Description of Individual Course Units

Course Unit Code Course Unit Title Type Of Course D U L ECTS
NAV 5035 FRACTURE MECHANICS OF MARINE COMPOSITES ELECTIVE 2 0 0 7

Offered By

Graduate School of Natural and Applied Sciences

Level of Course Unit

Second Cycle Programmes (Master's Degree)

Course Coordinator

PROFESSOR DOCTOR EVREN MELTEM TOYGAR

Offered to

NAVAL ARCHITECTURE
NAVAL ARCHITECTURE

Course Objective

1) The fundamental principal about Fracture Mechanics ( Fracture, failure , crack tips and ideal fracture.....)
2) LEFM and EPFM concept and to solve the engineering problems by using mathematical modelling of and physics and engineering knowledge under the consideration of fracture mechanics
3) To examine stress concentration under the influence of the crack, notch and holesto find the solution for real problems

Learning Outcomes of the Course Unit

1   To be informed of the bacis concepts in LEFM (linear elastic fracture mechanics)and EPFM( elastic-plastic fracture mechanics) by considering failure, fracturetypes and idealised fracture.
2   To quote the mathematical modeling of the engineering materials including crack, notch or ext. in the stuctures and the coherence with nowadays problems.
3   To obtain the parameters used in desing and dimensions,
4   To have an information about LEFM and EPFM , and to give the calculation of the
5   To make the study deals with the systems subjected to fatique, static and dynamic

Mode of Delivery

Face -to- Face

Prerequisites and Co-requisites

None

Recomended Optional Programme Components

None

Course Contents

Week Subject Description
1 Introduction: History of Fracture Mechanics, Fundamental concepts and equations, The definition of failure mechanisms
2 LEFM (linear elastic fracture mechanics) : Elastic stress field, the relationships between the stress and the strain, the stress intensity factor for Mod I, Mod II and Mod III, the fracture toughness parameter
3 Energy approach: Griffith Energy Approach, Irwin modification under the consideration of Griffith Energy theorem, The relationship between the G ve KI
4 The plastic zone at crack tip: The radius of plastic zone, plastic zone through thickness of the sample.
5 Mathematical modeling of LEFM: Plane elasticity, Cartesian coordinate, Polar coord., the analysis of crack propagation instability, the stress analysis at the crack tip, Westergaard Stress function
6 Elastic/Plastic Fracture Mechanics, J Integral
7 Midterm I
8 Elastic/Plastic Fracture Mechanics(EPFM): J Integral, crack opening displacement, Mathematical modeling of EPFM: to identify the crack tip opening displacement with yield modeling, J Integral, nonlinear energy release rate, singularity function
9 Crack Propagation, Failure Diagram, Failure Plastic Zone
10 Advanced Composite Malzemelerin Mechanics
11 Strain Energy Density of Composite Materials, Failure Modes for Interfaceces
12 Midter II
13 Impact Load for copmposite materials and fracture toughness
14 Problems and Solutions

Recomended or Required Reading

T. L. Anderson, "Fracture Mechanics: Fundamentals and Applications" (1995) CRC Press.
Richard W.Hertzberg, Deformation and Fracture Mechanics Of Engineering Materials.
Dowling, "Mechanical Behavior of Materials"
Broek, Elementary Engineering Fracture Mechanics

Planned Learning Activities and Teaching Methods

The course is taught in a lecture, class presentation and discussion format. All class members are expected to attend and both the lecture and take part in the discussion sessions. Besides the taught lecture, group presentations are to be prepared by the groups assigned for that week and presented to open a discussion session..

Assessment Methods

SORTING NUMBER SHORT CODE LONG CODE FORMULA
1 RPT REPORT
2 PRS PRESENTATION
3 FIN FINAL EXAM
4 FCG FINAL COURSE GRADE RPT * 0.25 + PRS * 0.25 + FIN * 0.50
5 RST RESIT
6 FCGR FINAL COURSE GRADE RPT * 0.25 + PRS * 0.25 + FIN * 0.50


*** Resit Exam is Not Administered in Institutions Where Resit is not Applicable.

Further Notes About Assessment Methods

None

Assessment Criteria

There will be 2 miterms, averaged out grades for which will be 35 % of the overall
success of the students. Homework will be 7.5% and the project will be 7.5% of the
success of the
student. Final exam will be 50 % of the resulting grade.

Language of Instruction

English

Course Policies and Rules

optional

Contact Details for the Lecturer(s)

Doç.Dr.M.Evren Toygar, evren.toygar@deu.edu.tr,
Dokuz Eylül University, Department of Mechanical Engineering,
Phone: 0 232 301 92 25
e-mail: evren.toygar@deu.edu.tr

Office Hours

To be announced.

Work Placement(s)

None

Workload Calculation

Activities Number Time (hours) Total Work Load (hours)
Lectures 12 5 60
Preparations before/after weekly lectures 12 2 24
Preparation for midterm exam 2 8 16
Preparation for final exam 1 15 15
Preparing assignments 4 5 20
Design Project 1 20 20
Final 1 3 3
Midterm 2 3 6
Quiz etc. 1 3 3
TOTAL WORKLOAD (hours) 167

Contribution of Learning Outcomes to Programme Outcomes

PO/LOPO.1PO.2PO.3PO.4PO.5PO.6PO.7PO.8PO.9PO.10PO.11PO.12
LO.1455454344434
LO.2444343443454
LO.3554343334543
LO.4444434444454
LO.5555544345435

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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