Special Session 1

Non-Invasive Measurement Methods, Systems and Instrumentation

 

Objectives

This Special Session is dedicated to R&D works in the broader areas of non-invasive measurements, system and instrumentation development.
 

Invited Speaker

Mr. Elliott Cramer, Head of the Nondestructive Evaluation Sciences Branch in the Research Directorate at NASA Langley Research Center


Invited Speaker Presentation Topic 

Research Developments in Non-Invasive Measurement Systems for Aerospace Composite Structures at NASA


Organizer and Contact Information

Dr. R. Zoughi, Missouri University of Science and Technology (S&T), (zoughi@mst.edu)
 

Invited Presentation

Photo
Position
Head of the Nondestructive Evaluation Sciences Branch in the Research Directorate
Affiliation
NASA Langley Research Center, Hampton, VA 23681, USA

Research Developments in Non-Invasive Measurement Systems for Aerospace Composite Structures at NASA
 

Abstract

The use of composite materials continues to increase in the aerospace community due to the potential benefits of reduced weight, increased strength, and manufacturability. Ongoing work at NASA involves the use of the large-scale composite structures for spacecraft (payload shrouds, cryotanks, crew modules, etc.). NASA is also working to enable both the use and sustainment of composites in commercial aircraft structures.  One key to the successful deployment and sustainment of these large composite structures is the rapid, in situ characterization of a wide range of potential defects that may occur anytime during the vehicle’s life.  Additionally, in many applications it is necessary to monitor changes in these materials over the life of the vehicle.  Quantitative characterization through Nondestructive Evaluation (NDE) of defects such as reduced bond strength, microcracking, and delamination damage due to impact, are of particular interest. This paper will present an overview of NASA’s applications of advanced aerospace composites as well as the NDE technologies being developed for their characterization and sustainment.  The approaches presented include investigation of conventional, guided wave, and phase sensitive ultrasonic methods, infrared thermography and x-ray CT techniques for NDE.  Finally, use of simulation tools for optimizing and validating these techniques will also be discussed.

Bio

Mr. Elliott Cramer is the Head of the Nondestructive Evaluation Sciences Branch in the Research Directorate at NASA Langley Research Center. Prior to his management position, he was a senior researcher with 28 years of experience in both experimental NDE technique development and computational modeling of energy propagation in materials.  Mr. Cramer is also the recipient of numerous NASA awards, he holds 12 U.S. Patents and has authored more than 80 technical publications.

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