AIAA Retiree’s hybrid on-line/in-person meeting at the Museum of Flight – March 16th, 2024

Boeing retiree John Fredrickson, who wrote the book “Boeing Metamorphosis” with John Andrews, will join us to describe some of the stories they collected for that book during their careers involved in Production Development and Planning.  The book covers the Boeing days between Bill Boeing standing up the company to the early days of the 747.

Registration is required – Please click on this link  to register, as registration is required whether attending via Zoom or in-person at the MoF.

Posted in Retirees, Technical, Uncategorized | Comments Off on AIAA Retiree’s hybrid on-line/in-person meeting at the Museum of Flight – March 16th, 2024

ONLINE TECH TALK: Predicting Face Sheet/Core Disbonding in Composite Sandwich Structures

Wednesday, February 21, 2024 | Zoom Meeting Online6:00 to 7:00 pm Pacific

Face sheet/core disbonding poses a threat to the structural integrity of a sandwich component. In this presentation a methodology is provided to predict the onset and growth of face sheet/core disbonding in sandwich structures. The methodology is similar to the one used for delaminations in monolithic composite laminates where an assessment is typically made by measuring a critical strain energy release rate.

Two general steps are required to address the phenomenon associated with face sheet/core disbanding:

  • First, a reliable means of characterizing face sheet/core disbonding has to be established. The Single Cantilever Beam (SCB) test has been identified as the most appropriate configuration to develop an ASTM standardized test method for a mode I dominated fracture toughness of sandwich constructions. Additionally, the development of a guide for mode I fatigue based on the static SCB test is proposed. Further, a Sandwich Mixed-Mode Bending (S-MMB) test for mixed-mode I/II fracture toughness of sandwich constructions based on the ASTM MMB test for laminates is suggested.
  • Second, analysis methods are required to help assess the likelihood of a structure exhibiting critical disbonding. The Virtual Crack Closure Technique (VCCT) and the Crack Surface Displacement Extension (CSDE) methods have been used to calculate the total energy release rate along the disbond front based on the results obtained from high-fidelity finite element analysis of the disbonded sandwich panel.

An alternate approach uses cohesive elements at the interface to determine disbond growth. A rapid engineering analysis tool based on an energy-based Rayleigh-Ritz approach is also discussed. Join us at 6:00 pm PDT Thursday February 2nd to dig into this important topic!

About Our Presenter

Dr. Ronald Krueger is a Research Fellow at the National Institute of Aerospace (NIA), which he joined as a Senior Research Engineer in 2003. He is involved in the development of durability and damage tolerance analyses for composite and sandwich structures using finite element analysis and fracture mechanics.

Prior to joining NIA, he worked as a Staff Scientist at ICASE in the NASA Langley Research Center, following an NRC post-doctoral research position at NASA Langley Research Center.

He is an accomplished presenter and awarded author of 85 technical papers published in refereed journals and international conference proceedings. His work has been cited more than 4300 times in the open literature. He has received awards from a host of technical societies and organizations, including:

  • ASTM, and its Committee D30 on Composite Materials 
  • American Society for Composites 
  • Australian Composite Structures Society
  • NASA Langley Research Center
  • National Institute of Aerospace 
  • The Composite Materials Handbook (CMH-17).
  • Peninsula Engineers Council Engineer of the Year 
  • AIAA Hampton Roads Section Engineer of the Year
  • AIAA Region I Engineer of the Year Honor Society Distinguished Member
  • Co-chair of the Technical Conference on Composite Materials, 2006 & 2014 

He is an AIAA Associate Fellow and a member of ASTM International and its Committee D-30 on Composite Materials, where he currently serves as chair. He is an active member of the American Society for Composites and The Composites Materials Handbook (CMH-17), where he currently serves as co-chair for the Disbonding and Delamination Task Group. He is an active member of the NAFEMS Composites Working Group, which he chaired from 2011 until 2021.

Dr. Krueger received his doctorate in Aerospace Engineering from the University of Stuttgart, Germany, where he worked as a research and teaching assistant at the Institute for Statics and Dynamics of Aerospace Structures.

Registration

There’s no charge to attend. If you register in advance, we’ll send you the calendar meeting invitation with all the Zoom connection options. Click the button to register:

Posted in Technical | Comments Off on ONLINE TECH TALK: Predicting Face Sheet/Core Disbonding in Composite Sandwich Structures

2023 Meet & Greet with Dan Dumbacher, AIAA Executive Director | 12/13/23 6:00 pm

Dan Dumbacher, AIAA Executive Director
Dan Dumbacher, AIAA Executive Director

Mark your calendar and REGISTER using the link below for our upcoming Wednesday evening December 13th meet & greet informal networking and discussion with our six-year AIAA Executive Director, Dan Dumbacher.

Prior to joining AIAA management in January 2018, Dan was a Professor of Engineering Practice in the School of Aeronautics and Astronautics at Purdue, where he taught courses in systems thinking, systems engineering, and space policy, focused on preparing the next generation to solve the multi-faceted challenges of the future by better integrating engineering disciplines with business, political science, communications and philosophy. 

Prior to Purdue, Dumbacher spent 33 years with NASA, from summer intern to Deputy Associate Administrator for the Exploration Systems Development Division in the Human Exploration and Operations Mission Directorate. He was Program Director for exploration systems development, which included the Space Launch System, Orion and ground systems development and operations, leading a 5000+ team spanning all NASA centers and industry, responsible for a $3 billion annual budget. He has received numerous awards and honors including the Silver Snoopy Award, NASA Distinguished Service Medal and Purdue’s Gustafson Teaching Award. He has a BS in mechanical engineering from Purdue and an MBA from the University of Alabama, and completed the Senior Managers in Government program at Harvard University.

We will have plenty to talk about, so register and JOIN US on the 13th to get the latest inside scoop on what’s going on in aerospace politics, technology, industry and your own professional society.

Since we’ll be providing the pizza and beverages, we need to know how many are coming, so registration is required. Click on the link below to register:

Recapping the details:

  • WHEN: Wednesday evening, December 13th 6:00 pm to 9:00 pm
  • WHERE: Raisbeck Aviation High School, 9229 E Marginal Way S, Tukwila, WA 98108
  • COST: Free

We’re looking forward to seeing you there!

Posted in Social | Comments Off on 2023 Meet & Greet with Dan Dumbacher, AIAA Executive Director | 12/13/23 6:00 pm