Engineering Professional Programs

Dates	April 9 - June 11, 2008	Registration available soon; check back for updates.
Time	Wednesdays, 4:00 - 7:00 p.m.
Location	Boeing Everett campus
Credit	3 CEUs or 3 UW credits

Course Description

Concepts of fatigue and failure in aerospace structures, cumulative damage crack initiation, crack growth, residual strength, probability aspects and case histories. Included are macro and micro aspects of fatigue. analytical methods for fatigue life assessment in aircraft structures. applications of linear fracture mechanics to failure analysis and fracture control, fracture toughness and fatigue testing techniques, environmental effects.

Course Outline

1. Introduction to Fatigue Mechanism

1.1 crack nucleation

1.2 crack growth

1.3 fatigue failure

2. Design Considerations

2.1 stress concentration

2.2 residual stresses

3. Stress Intensity Factors

3.1 Definition

3.2 Determination

3.3 Applications

4. Fatigue Properties

4.1 Fatigue limits

4.2 S-N curves

4.3 Fatigue diagrams

4.4 Fatigue crack growth

5. Fatigue Strength

5.1 Notched specimens

5.2 S-N curves/dd>

6. Fracture Mechanics

6.1 Crack growth test

6.2 Analytical prediction

6.3 Plasticity

6.4 Plane stress and plane strain

7. Fatigue Loads and Spectra

7.1 Load types

7.2 Load history

8. Fatigue Damage Accumulation

8.1 Crack nucleation

8.2 Crack growth

9. Fretting and Corrosion Fatigue

9.1 Fretting corrosion mechanism and effects

9.2 Corrosion fatigue mechanism and effects

9.3 Methods to avoid

10. Fatigue and Failure of Joints and Structure

10.1 Fastened structures

10.2 Bonded structures

10.3 Welded structures

10.4 Stiffened structures

Texts

Schive, Jaap, Fatigue of Structures and Materials, Klewer Academic Publishers, 2001; ISBN: 0-7923-7014-7

This text is available from Amazon.com, BarnesandNobel.com and other online and local booksellers.

Instructors

Patrick Safarian

is a Technical Specialist with the Federal Aviation Administration. Since 1987 he has been the involved in ensuring safety of the existing fleet as well as certification of new products in the Seattle Aircraft Certification Office and Large Airplane Directorate. Prior to that, he was at The Boeing Company as a senior specialist engineer. He contributed to the development of methods and allowables for fracture mechanics and fatigue analyses, and performed analytical and numerical analyses on highly complex structures, including accident investigations. He received his BSME from Northrop University and his MSME from California State University at Fullerton, and completed courses toward a PhD in Mechanical Engineering at UC, Davis. He recently earned his Doctorate in Theology at Northwest Graduate School. He currently teaches graduate level courses in University of Washington and Central Washington University.

Michael Mohaghegh

has worked as a Principal Lead Engineer, Manager and FAA Designated Engineering Representative for the Boeing Company. Presently, he is a Boeing Technical Fellow in Advanced Structures and Materials. He has 38 years experience in designing and analyzing commercial aircraft (707,737,747,B1,767,777) and developing technology standards. Dr. Mohaghegh is the developer and instructor for design and analysis, finite element, and fatigue and fracture courses at Boeing and has also taught at airlines, suppliers and universities in the United States and abroad. Dr. Mohaghegh received his B.S. and M.S.degrees from the University of California at Berkeley and his Ph.D. from the University of Washington in structural engineering. He has published papers in the Journal of Applied Mechanics, Journal of Aircraft, International Journal of Mechanical Sciences, International Journal of Mechanical Engineering Education and the Boeing AERO magazine.

Questions

If you have questions about this program, please call UW Educational Outreach Advising at 206-685-8936 in the greater Seattle area or 1-800-543-2320. If you have questions about registration for this program, please call the UW Educational Outreach Registration Department at 206-543-2310 or 1-800-543-2320.

For more information about Boeing initiatives in composites education, email Michael Richey, Boeing Learning Training and Development, Engineering & Operations Group.