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Quantitative NDE applied to composites and metalsResearch at the NASA/Langley Research Center concerning quantitative NDE of composites and metals is reviewed. The relationship between ultrasonics and polymer cure is outlined. NDE models are presented, which can be used to develop measurement technologies for characterizing the curing of a polymer system for composite materials. The models can be used to determine the glass transition temperature, the degree of cure, and the cure rate. The application of the model to control autoclave processing of composite materials is noted. Consideration is given to the use of thermal diffusion models combined with controlled thermal input measurements to determine the thermal diffusivity of materials. Also, a two-dimensional physical model is described that permits delaminations in samples of Space Shuttle Solid Rocket Motors to be detected in thermograms in the presence of cooling effects and uneven heating.
Document ID
19900048032
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Heyman, Joseph S.
(NASA Langley Research Center Hampton, VA, United States)
Winfree, William P.
(NASA Langley Research Center Hampton, VA, United States)
Parker, F. Raymond
(NASA Langley Research Center Hampton, VA, United States)
Heath, D. Michele
(NASA Langley Research Center Hampton, VA, United States)
Welch, Christopher S.
(College of William and Mary Williamsburg, VA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Quality Assurance And Reliability
Meeting Information
Meeting: Nondestructive Monitoring of Materials Properties
Location: Boston, MA
Country: United States
Start Date: November 28, 1988
End Date: November 30, 1988
Sponsors: Battelle Memorial Inst., Natl. Research Council of Canada, EPRI
Accession Number
90A35087
Distribution Limits
Public
Copyright
Other

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