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TECHNICAL PAPERS

Effects of Temperature and Moisture on the High Strain Rate Compression Response of Graphite/Epoxy Composites

[+] Author and Article Information
M. V. Hosur, S. M. Waliul Islam, S. Jeelani

Center for Advanced Materials, Tuskegee University, Tuskegee, AL 36088

U. K. Vaidya

The University of Alabama at Birmingham, Department of Materials Science and Engineering, Birmingham, AL 35294

P. K. Dutta

US Army Engineer Research and Development Center, Cold Region Research and Engineering Laboratory, Hanover, NH 03755

J. Eng. Mater. Technol 125(4), 394-401 (Sep 22, 2003) (8 pages) doi:10.1115/1.1605113 History: Received February 05, 2003; Revised June 17, 2003; Online September 22, 2003
Copyright © 2003 by ASME
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References

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Figures

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Schematic of compression Split Hopkinson Pressure Bar setup
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Dynamic stress-strain plot of samples loaded at 449/s and 693/s at room temperature
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Dynamic stress-strain plot of samples loaded at 444/s and 750/s at 51.7°C
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Dynamic stress-strain plot of samples loaded at 510/s and 723/s at 121.1°C (250°F)
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Dynamic stress-strain plot of samples loaded at 752/s and 1183/s at 190.6°C (375°F)
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Dynamic stress-strain plot of moist/freeze conditioned samples loaded 734/s and 1215/s at room temperature
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Effect of temperature on the strain rate
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Effect of pressure on the moist/freeze conditioned samples
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Dynamic stress-strain plots of samples tested at (a) 103.4 KPa (15 psi), and (b) 137.9 KPa (20 psi)
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SEM of sample tested at room temperature at strain rate of 449/s
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SEM of sample tested at 121.1°C at strain rate of 510/s exhibiting edge delamination
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SEM of sample tested at 190.6°C at strain rate of 758/s
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Micrographs of sample subjected to moist/freeze conditioning and tested at 799/s
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Micrographs of sample tested at room temperature at 693/s at magnifications of (a) 33, and (b) 2000
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Micrographs of sample conditioned at 121.1°C and tested at 723/s at magnifications of (a) 33, and (b) 850
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Micrographs of sample subjected to conditioning at 190.6°C and impacted at strain rate of 1183/s at magnifications of (a) 33, and (b) 850
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Micrographs of sample subjected to moist/freeze conditioning and tested at strain rate of 1215/s indicating (a) longitudinal splitting, (b) crushing of the impact surface, and (c) oxidation and plasticizing effects

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