Experimental investigations were carried out on unidirectional Graphite/Epoxy laminate samples under dynamic compression loading using a modified Split Hopkinson Pressure Bar. High strain rate testing was carried out at room and elevated temperatures. 30 layered graphite/epoxy unidirectional laminates made using DA 4518U unidirectional prepregs system were fabricated. Tests were carried out on samples at room, 51.7°C, 121.1°C, and 190.6°C temperatures. Additional high strain rate tests were conducted on samples that were subjected to moist/freeze conditioning for 42 days. Failure modes were studied through scanning electron microscopy. Results of the study indicated plasticizing of matrix which was reflected through increased ductility of the samples as well as reduced slope of the stress-strain curves with the increase in temperature. Similar effect was evident in the samples that were subjected to moist/freeze conditioning.
Effects of Temperature and Moisture on the High Strain Rate Compression Response of Graphite/Epoxy Composites
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division February 5, 2003; revision received June 17, 2003. Associate Editor: A. Pelegri and A. Karlsson.
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Hosur, M. V., Waliul Islam, S. M., Vaidya, U. K., Dutta, P. K., and Jeelani, S. (September 22, 2003). "Effects of Temperature and Moisture on the High Strain Rate Compression Response of Graphite/Epoxy Composites ." ASME. J. Eng. Mater. Technol. October 2003; 125(4): 394–401. https://doi.org/10.1115/1.1605113
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