Mr. James Burd - Aeronautica
This course is a shorter version of the full DTA course instructed by Dr. Scott Fawaz and James Burd. It presents selected topics that address both the military and civil airworthiness certification requirements for damage tolerance compliance. The course provides a review of current airworthiness requirements, mission utilization, fatigue loads and spectra development and damage tolerance methodologies as well as a review of example problems demonstrating compliance and a discussion of WFD criteria. The authors have 30+ years each in the aircraft industry. The full course is broken up into three parts; 1.) Fatigue Loads and Spectra Development, 2.) Damage Tolerance and Fatigue Evaluation of Structure and 3.) Practical DTA Application Examples. This short seminar presents selected topics from the full course.
Mr Brent Lancaster - ESRD StressCheck
Current methodologies for modeling and analysis of bonded repair patch designs for application to damaged sections of aircraft wing skin can be computationally expensive and difficult to implement in practice, relying instead on accumulated practical experience to determine the effectiveness of a given repair design. These methods, although effective, require a knowledge base acquired over many years of experience making sustainment organizations vulnerable to gaps in knowledge between newer members and more seasoned experts. This training course will outline proposed methodologies, guidelines and best practices for utilizing ESRD’s StressCheck Professional finite element analysis (FEA) software to parametrically model, analyze and assess the effectiveness of composite or metallic bonded repair patch designs and variations. The effectiveness of repairs regarding static strength and damage tolerance will be addressed. In addition, strategies for efficient solution verification and hierarchic modeling approaches of 3D repair patches will be explored, and a set of representative demonstrations of technology will be provided. TRAINING TOPICS In this 2-hour training course, we will focus on the following topics: -StressCheck’s FEA technology implementation enabling modeling of very thin domains, including adhesive layers with 3D-solid elements. -Best practices and guidelines for modeling and analyzing 3D bonded repair patch variations (e.g. racetrack/rectangular, circular/elliptical, tapered, metallic, ply-by-ply, homogenized, etc.). -Performing “what if?” logic-driven studies of a digital 3D bonded repair handbook solution via StressCheck API-powered Engineering Simulation App, in which user-defined input data is passed from Python or Excel VBA to StressCheck Professional to perform scripted “on-the-fly” model adjustments and repair-oriented computations.
James A. Harter, Senior Consultant for LexTech, Inc.
Alexander V. Litvinov, Owner, LexTech, Inc.
A 4-hour AFGROW presentation will review the capabilities of the current AFGROW release, provide an overview of the graphical user interface, and demonstrate how to use AFGROW and BAMpF for some practical life prediction examples. The following topics will be included: New Capabilities AFGROW User Interface AFMAT Fracture Mechanics Database Spectrum Manager Demonstration Life Prediction Example Using the Standard GUI and Tabular Growth Rate Data Automating AFGROW and Spectrum Manager BAMpF Demonstration.