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Vol.51, No.12, 913 ~ 921, 2013
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| Title |
| Mechanical Properties of Commercial Carbon Fibers Using a Single Filament Tensile Test |
| 조한익 Han Ik Joh , 송해경 Hae Kyung Song , 김기영 Ki Young Kim , 구본철 Bon Cheol Ku1 , 강필현 Phil Hyun Kang , 이성호 Sung Ho Lee |
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| Abstract |
| Abstract: In this study, mechanical properties of commercial carbon fibers were evaluated using a single filament tensile test with various fiber gauge lengths. Tensile strength increased significantly with a decreasing length of the test specimens possibly due to small defect sites. The compliance method provided more accurate moduli of the carbon fibers, removing system errors during the single filament tensile test. The Weibull modulus revealed that shorter specimens had an inhomogeneous defect distribution, leading to a higher tensile strength and its standard deviation. X-ray diffractograms of carbon fibers showed a similar crystallinity and orientation in spite of significant differences in the fiber modulus and strength, indicating that crystalline structure of the commercial carbon fibers used in the study was not attributable to the difference in their tensile properties. |
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| Key Words |
| carbon and graphite, fibers, tensile test, scanning electron microscopy, X-ray diffraction |
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