Experimental results are presented showing that electron irradiation has a variable effect on the properties of graphite-epoxy depending upon the test temperature and the property of interest. In general, compression properties are improved at cold temperature and degraded at elevated temperature. With the exception of some moduli, tensile and shear properties are degraded at both cold and elevated temperatures. Electron irradiation lowers the glass transition temperature of graphite/epoxy significantly. Property degradation of irradiated materials at the elevated temperature is associated with the reduction in Tg. It is shown that a [0] compression strength test is the most sensitive test for exhibiting the effects of electron irradiation. Results from tests on neat resin also show that the bulk matrix is degraded after irradiation and that the correlation between resin and composite response is good.
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April 1988
Research Papers
Degradation of Graphite-Epoxy Due to Electron Radiation
C. T. Herakovich,
C. T. Herakovich
Virginia Polytechnic Institute and State University, Blacksburg, VA 24060
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D. J. Fox,
D. J. Fox
Virginia Polytechnic Institute and State University, Blacksburg, VA 24060
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G. F. Sykes
G. F. Sykes
NASA Langley Research Center
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C. T. Herakovich
Virginia Polytechnic Institute and State University, Blacksburg, VA 24060
D. J. Fox
Virginia Polytechnic Institute and State University, Blacksburg, VA 24060
G. F. Sykes
NASA Langley Research Center
J. Eng. Mater. Technol. Apr 1988, 110(2): 146-152 (7 pages)
Published Online: April 1, 1988
Article history
Received:
November 11, 1987
Online:
September 15, 2009
Citation
Herakovich, C. T., Fox, D. J., and Sykes, G. F. (April 1, 1988). "Degradation of Graphite-Epoxy Due to Electron Radiation." ASME. J. Eng. Mater. Technol. April 1988; 110(2): 146–152. https://doi.org/10.1115/1.3226023
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