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Space radiation effects on the thermo-mechanical behavior of graphite-epoxy compositesThis investigation of composite material properties utilized T300/934 graphite-epoxy that was subjected to 1.0 MeV electron radiation for a total dose of 1.0 x 10 to the 10th rads at a rate of 5.0 x 10 to the 7th rads/hour, simulating a worst-case exposure equivalent to 30 years in space. Mechanical testing was performed on 4-ply unidirectional laminates over the temperature range of -250 F (116 K) to +250 F (394 K). In-plane elastic tensile and shear properties as well as strength were obtained. The results show that electron radiation degrades the epoxy matrix and produces products that volatilize at the temperatures considered. These degradation products plasticize the epoxy at elevated temperatures and embrittle it at low temperatures, thereby altering the mechanical properties of the composite.
Document ID
19870039904
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Milkovich, Scott M.
(Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Herakovich, Carl T.
(Virginia Polytechnic Institute and State University Blacksburg, United States)
Sykes, George F.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 13, 2013
Publication Date
November 1, 1986
Publication Information
Publication: Journal of Composite Materials
Volume: 20
ISSN: 0021-9983
Subject Category
Composite Materials
Accession Number
87A27178
Funding Number(s)
CONTRACT_GRANT: NAG1-343
Distribution Limits
Public
Copyright
Other

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