Fatigue and Damage Tolerance Analysis Institute
December 7-11, 2009 · UWEO Bellevue This course has been cancelled
January 11-15, 2010 · UWEO Bellevue
Overview
This five-day intensive course, offered in cooperative agreement with the FAA, is designed to prepare participating engineers to meet the challenges of finding compliance to the Aging Aircraft Safety Rule (AASR) including the new Part 26 requirement, by providing fundamental knowledge of fatigue and fracture mechanics and the tools necessary to conduct accurate fatigue and damage tolerance analyses.
Learn:
- Concepts of fatigue, fracture mechanics and damage tolerance in aerospace structure.
- Analytical and numerical methods of fatigue and damage tolerance analysis.
- Tools to apply and solve fatigue and damage tolerance problems.
Topics:
- Introduction to fatigue mechanism
- Design considerations
- Fatigue properties
- Fatigue strength
- Stress intensity factors
- Fracture mechanics
- Fatigue loads and spectra
- Fatigue damage accumulation
- Introduction to non-destructive inspection
- Fatigue and failure of joints and structure
- Damage tolerance of repairs and alteration
Featuring case studies and examination of lessons learned from accidents.
Institute includes:
- A copy of the course textbook, Fatigue of Structures and Materials by Jaap Schijve
- A course notebook written by your instructor and supplemental materials
- Refreshments served each morning and afternoon and two catered lunches during the week
Course Outline
Monday
- Introduction to Fatigue Mechanism: History and background, crack nucleation, crack growth, fatigue failure.
- Design Considerations: Stress concentration, eccentricity, hard point, residual stresses, surface treatment, computational tools.
Tuesday
- Fatigue properties: Fatigue limits, S-N curves, fatigue diagrams, fatigue crack growth.
- Fatigue Strength: Notched and un-notched specimens, S-N curves, Analytical prediction.
Wednesday
- Stress Intensity Factors: Definition of K, Elastic crack tip stresses, Strain energy release rate G, relationship of G and K, computation techniques, applications.
- Fracture Mechanics: Griffith theory, crack growth properties, fracture toughness, analytical prediction, crack tip plastic zone, plane stress and plane strain, applicaion.
Thursday
- Fatigue Loads and Spectra: Load spectra, variable amplitude loading in fatigue, variable amplitude loading in crack growth, effects of load history.
- Fatigue Damage Accumulation: Crack growth, residual strength and failure analysis, fail safety, damage tolerance, safe life, inspections.
Friday
- Introduction to Non-destructive Inspection: Inspection techniques, probability and reliability of inspections, inspection limitations.
- Fatigue and Failure of Joints and Structure: Fastened structures, bonded structures, stiffened structures.
- Damage Tolerance of Repairs and Alteration: Introduction, discussion and guidelines of methods, computer software, examples-antenna installations.
- Supplemental Topics: Lessons learned from accidents, analytical and numerical methods to fatigue and damage tolerance analyses, widespread fatigue damage, case studies, workout examples of repairs and alterations.
- Special Feature: Introduction and demonstration of NASGRO and AFGROW computer tools.
Successful completion
This highly interactive class includes daily homework assignments and group discussions to reinforce what you're learning in class each day.
To successfully complete this institute and earn 4.0 Continuing Education Units from the University of Washington, you will be expected to complete all homework assignments, actively participate in class discussions, complete a final project and pass the final examination.
Instructors
Patrick Safarian, Ph.D, P.E..
Damage Tolerance Technical Specialist, Federal Aviation Administration (FAA), Seattle Aircraft Certification Office
Patrick Safarian has been Technical Specialist with the FAA since 1987. During his time with the FAA, Patrick has been involved in ensuring the safety of the existing airplane fleet as well as in the certification of new products in the Seattle Aircraft Certification Office and Large Airplane Directorate. Previously, Patrick was a Senior Specialist Engineer with the Boeing Company, contributing to the development of methods and allowables for fracture mechanics and fatigue analyses, performing analytical and numerical analyses on highly complex structures including accident investigations. In addition to his work with the FAA, Patrick teaches graduate level courses for the University of Washington and Central Washington University.
Jason Dai, Ph.D.
Principal Engineer, FAA DER - Structures Pt 25 with DTA, Structural Integrity Engineering, Inc.
Jason Dai is an FAA Consultant DER - Structures with Damage Tolerance Analysis delegation and Part 26 delegations for STC structural modifications. He has been involved in all areas of structural analysis including detailed stress analysis, composite structures analysis, fatigue and damage tolerance analysis and finite element analysis for interior and primary structures. In recent years, Jason has been involved in design and certification of several freighter conversion programs such as: DC-8 Aircraft, 727, 737 and 757-200 conversions as well as in Boeing Fleet AOG support on structural repair assessment (RAG) and many interior payload structural modifications for various Boeing commercial aircraft. Related to certification, Jason was involved in certification plan development, coordination with FAA engineers, finding compliance to FARs and final engineering data approval.
Testimonials
Patrick Safarian is an outstanding instructor. He communicates very well and provides the information in an atmosphere that is conducive to learning. He keeps everyone involved making certain that the information is understood. He encourages discussion. As a result, he is providing real-life stuff that needs to be used in the analyses to comply with part 26. Damage Tolerance DERs make presentations about how they do their work, including a brief lecture on NASGRO.
- Gary Park, FAA, Aircraft Certification Office, Small Airplane Directorate, Wichita, KS
Patrick Safarian is a great teacher who taught the course with passion flavored with good experience accumulated over many years. I will send more engineers from Jamco to future seminars.
- Atuo Sato, Jamco America, Kirkland, WA
Schedule and Fees
UWEO, Bellevue (see map). Monday-Friday, 8 a.m.-5 p.m., December 7-11, 2009; January 11-15, 2009 $1,995 + $35 nonrefundable registration fee; 4 CEUs. Instructor: Patrick Safarian, Ph.D., P.E., and Jason Dai, Ph.D.
Group Registration Discount
Groups of 3 or more from the same organization who register at the same time pay a discounted registration fee of $1,795 plus $35 registration fee per person; all must register for the same section - either December #106474 OR January #106475.
How to Register
Registration details will be available soon
January 11-15, 2010: registration #106475
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