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Tensile behavior of carbon fiber bundles at different strain rates
Authors:Yuanxin Zhou  Yang Wang  Shaik Jeelani
Affiliation:a Center for Advanced Materials, Tuskegee University, Tuskegee, AL 36830, USA
b Department of Modern Mechanics, University of Science & Technology of China, Hefei, Anhui, PR China
Abstract:Quasi-static and high strain rate tensile tests have been performed on T700 carbon fiber bundles and complete stress-strain curves at the strain rate range of 0.001 s− 1 to 1300 s− 1 were obtained. Results show that strain rate has negligible effect on both ultimate strength and failure strain, and T700 carbon fiber can be regarded as strain rate insensitive materials. On the basis of the fiber bundles model and the statistic theory of fiber strength, a damage constitutive model based on Weibull distribution function has been developed to describe tensile behavior of T700 fiber bundles. And the method to determine the statistic parameters of fibers by tensile tests of fiber bundles is established, too.
Keywords:Fiber   Mechanical properties   Strain rate
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