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Impact damage resistance of carbon/epoxy composite tubes for the DC-XA liquid hydrogen feedlineLow-velocity impacts were inflicted upon two elbow sections of carbon/epoxy feedline that are to be a part of the Delta Clipper-XA flight vehicle. A soap-based liquid leak detector solution was used to inspect the impact sites for leaks of pressurized gas that was pumped into the tube. Visual surface damage was noted and recorded for each impact site. After impact testing of each of the two sections of tubes was completed, the damage zones were disected from the tube and cross sectioned through the impact site. These specimens were polished after potting them in epoxy and were examined for microcracking using a fluorescent dye penetrant technique. The results showed that nonvisible damage could cause microcracking, thereby resulting in leaks through the tube wall.
Document ID
19960001531
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Nettles, A. T.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1995
Subject Category
Composite Materials
Report/Patent Number
NAS 1.60:3583
NASA-TP-3583
M-793
Accession Number
96N11539
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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