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Fatigue-Arrestor BoltsBolts that arrest (or, more precisely, retard) onset of fatigue cracking caused by inelastic strains developed. Specifically developed to be installed in flange holes of unrestrained rocket engine nozzle. Fanges sometimes used to bolt nozzle to test stand; however, when rocket engine operated without this restraint, region around bolt holes experience severe inelastic strains causing fatigue cracking. Interference fits introduce compressive preloads that retard fatigue by reducing ranges of strains. Principle of these fatigue-arrestor bolts also applicable to holes in plates made of other materials and/or used for different purposes.
Document ID
19950065544
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Onstott, Joseph W. (Rockwell International Corp.)
Gilster, Mark (Rockwell International Corp.)
Rodriguez, Sergio (Rockwell International Corp.)
Larson, John E. (Rockwell International Corp.)
Wickham, Mark D. (Rockwell International Corp.)
Schoonover, Kevin E. (Rockwell International Corp.)
Date Acquired
August 17, 2013
Publication Date
August 1, 1995
Publication Information
Publication: NASA Tech Briefs
Volume: 19
Issue: 8
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
MFS-30068
Accession Number
95B10385
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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