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Initial Investigation of Cryogenic Wind Tunnel Model Filler MaterialsFiller materials are used for surface flaws, instrumentation grooves, and fastener holes in wind tunnel models. More stringent surface quality requirements and the more demanding test environment encountered by cryogenic wind tunnels eliminate filler materials such as polyester resins, plaster, and waxes used on conventional wind tunnel models. To provide a material data base for cryogenic models, various filler materials are investigated. Surface quality requirements and test temperature extremes require matching of coefficients of thermal expansion or interfacing materials. Microstrain versus temperature curves are generated for several candidate filler materials for comparison with cryogenically acceptable materials. Matches have been achieved for aluminum alloys and austenitic steels. Simulated model surfaces are filled with candidate filler materials to determine finishing characteristics, adhesion and stability when subjected to cryogenic cycling. Filler material systems are identified which meet requirements for usage with aluminum model components.
Document ID
19860001788
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Firth, G. C.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 12, 2013
Publication Date
September 1, 1985
Publication Information
Publication: Welding, Bonding and Fastening, 1984
Subject Category
Composite Materials
Accession Number
86N11255
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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