Abstract:

To study the structure of carbon fiber needled felts and characterize parameterized, we studied the structure parameters of three kinds of carbon fiber needled felts based on mixed Weibull distribution. The fitting curves of fiber length distributions were obtained, and the differences were discussed. The beam under pure bending model was used to simulate the curved fiber, and the bending parameters were obtained. The results show that the mixed Weibull distribution could be used to analyze the structure of carbon fiber needled felts. The fitting curves are well consonant with the observation data. In addition, by regarding the curved carbon fiber as beam under pure bending, the structure of curved fibers could be simulated, which could be used to generate the 3D geometric model of carbon fiber needled felts.

Key words: carbon fiber, needled felt, mixed Weibull destribution, structural characterization, length distribution