AFGROW Damage Tolerance Analysis Training

With Application to FAA Certification


During the week of January 20-24, 2020, AFGROW hosted AFGROW Damage Tolerance Analysis Training with Application to FAA Certification in Orlando, FL. This 5-day training gave participants an opportunity to learn more about AFGROW’s many capabilities. Topics covered within the course included: a practical review of Linear Elastic Fracture Mechanics concepts, familiarization with the design and operation of the AFGROW crack growth life analysis program, and a day dedicated on damage tolerance analysis (DTA).

User response to the AFGROW Damage Tolerance Analysis Training has been tremendous. We had 24 participants attending this event. All feedback we have received has been positive, and we hope each participant has gained a better and more practical understanding of the many features of AFGROW. We look forward to hosting the 2021 AFGROW Damage Tolerance Analysis Training with Application to FAA Certification early next year in California. Please contact us if you have any questions.


Instructors:

James A. Harter Alexander V. Litvinov Dr. Scott A. Fawaz
Jim is a graduate of Purdue University (BSAAE – 1980, MSAAE – 1982). He did his Master’s work on “Experimental Crack Growth of Surface Cracks at Open and Pin Loaded Holes.” He began his professional career in 1982 at Northrop Corporation as a Stress Analyst for the F-20 and moved to Damage Tolerance analysis for the B-2. After working at Northrop, he moved to Sikorsky Aircraft, developing LEFM analysis methods and software in support of the HH-60 and H-53. In 1987, he began working for the U.S. Air Force Research Laboratory where he managed the AFRL Fatigue and Fracture Lab for several years and developed the software that is now known as AFGROW. Jim retired from AFRL in 2017 and is now a Senior Consultant for LexTech, Inc. Mr. Harter is an internationally recognized expert in fatigue and fracture mechanics and has nearly 40 years of experience. Alex attained his Master’s degree in Mechanical Engineering at Kharkov Aerospace University, Kharkov, Ukraine. He has developed an extensive software experience in Software Design and Development, Software Architecture, Product Management, and Software Globalization while working as Research Engineer, Senior Software Engineer and Software Architect in Finance, Aerospace and Software industries. As a software consultant Alex worked for clients such as US Air Force, Microsoft, Fidelity Investments, Boeing, State of Ohio, NCR and Teradata. Since 1995 Alex worked as the AFGROW lead software developer. Dr. Fawaz started his career as an Air Force officer responsible for damage tolerance analysis (DTA) of C-5A/B, C-17A, O/A/T-37B, T-38, F-5, and OV-10 aircraft at San Antonio Air Logistics Center. He received his PhD in Aerospace Engineering from Delft University of Technology in 1997. Dr. Fawaz was the director for the Center for Aircraft Structural Life Extension (CAStLE) at the United States Air Force from 2003 to 2010. Dr. Fawaz worked for Gulfstream and Avenger Aircraft, developing DTA methods and processes. Dr. Fawaz is currently the president of SAFE Inc. SAFE Inc. has performed FAR Part 25 Stress and Fatigue and Damage Tolerance (FDT) Engineering Services for Boeing 767, 757, 737, Airbus A320, Gulfstream GIII, GIV, GV, and Lockheed Constellation L1649. He has also been involved in KC-135 Teardown Failure Analysis and Boeing KC-46A Tanker Corrosion programs.

Course Description: This training class begins with a practical review of Linear Elastic Fracture Mechanics concepts and principles along with some example applications using AFGROW.

The next 3 days will familiarize students with the design and operation of the AFGROW crack growth life analysis program. The following topics will be addressed: AFGROW graphical user interface, spectrum management, stress intensity models, crack growth rate data, stress state effects, AFGROW preferences, advanced models, and crack initiation. Several example problems are included to gain hands-on experience with AFGROW. The class will also introduce the use of advanced features unique to AFGROW (COM automation, Advanced Multiple Crack Solutions, and Plug-In K-Solutions). We are also including a section on tips and tricks to help users model some practical complex geometries (i.e.: continuing damage scenarios).

The final day will focus on damage tolerance analysis (DTA) and management issues. This will include: an overview of the damage tolerance design process, fatigue critical locations, FAA certification process, structural & DTA substantiation, and more example problems.