NDLI: Fastener load tests and retention systems tests for cryogenic wind-tunnel models

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Fastener load tests and retention systems tests for cryogenic wind-tunnel models

Content Provider	NASA Technical Reports Server (NTRS)
Author	Wallace, J. W.
Copyright Year	1984
Description	A-286 stainless steel screws were tested to determine the tensile load capability and failure mode of various screw sizes and types at both cryogenic and room temperature. Additionally, five fastener retention systems were tested by using A-286 screws with specimens made from the primary metallic alloys that are currently used for cryogenic models. The locking system effectiveness was examined by simple no-load cycling to cryogenic temperatures (-275 F) as well as by dynamic and static loading at cryogenic temperatures. In general, most systems were found to be effective retention devices. There are some differences between the various devices with respect to ease of application, cleanup, and reuse. Results of tests at -275 F imply that the cold temperatures act to improve screw retention. The improved retention is probably the result of differential thermal contraction and/or increased friction (thread-binding effects). The data provided are useful in selecting screw sizes, types, and locking devices for model systems to be tested in cryogenic wind tunnels.
File Size	9554526
Page Count	52
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19840020895
Archival Resource Key	ark:/13960/t2k699w5w
Language	English
Publisher Date	1984-08-01
Access Restriction	Open
Subject Keyword	Metallic Materials Low Temperature Tests Threads Temperature Effects Fasteners Wind Tunnel Models Dynamic Loads Contraction Static Loads Stainless Steels Cryogenic Wind Tunnels Load Tests Locking Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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