Abstract
The tensile tests for high tensile strength polyacrylonitrile (PAN)-based (T1000GB) carbon fiber epoxy-impregnated bundle composite at various strain rates ranging from 3.33 × 10−5 to 6.0 × 102 s−1 (various crosshead speeds ranging from 8.33 × 10−7 to 1.5 × 101 m/s) were investigated. The statistical distributions of the tensile strength were also evaluated. The results clearly demonstrated that the tensile strength of bundle composite slightly increased with an increase in the strain rate (crosshead speed) and the Weibull modulus of tensile strength for the bundle composite decreased with an increase in the strain rate (crosshead speed), there is a linear relation between the Weibull modulus and the average tensile strength on log-log scale.
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Notes
The strain rate increased with decreasing the gage length. However, the effect of gage length (size effect) on the tensile strength and Weibull modulus of single carbon fiber was larger than the effect of strain rate. The effect of gage length was not simply characterized the effect of strain rate.
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This work was supported by JST (Japan Science and Technology Agency) through Advanced Low Carbon Technology Research and Development Program (ALCA).
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Naito, K. Effect of Strain Rate on Tensile Properties of Carbon Fiber Epoxy-Impregnated Bundle Composite. J. of Materi Eng and Perform 23, 708–714 (2014). https://doi.org/10.1007/s11665-013-0823-5
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DOI: https://doi.org/10.1007/s11665-013-0823-5