Abstract
he mechanical properties of carbon fiber reinforced plastic (CFRP) is strongly dependent on the mechanical characteristics and the arrangement of the carbon fiber monofilaments which consist of multifilament. In the case of the fibers for clothing, the weaving performance of the thread which put on the twist is improved in comparison with the case of the yarn without twist. On the other hand, elastic modulus and fracture strength of carbon fiber are strongly influenced by applying twist to the multifilament. However, the relationship between the fracture behavior and twist number applied to the multifilament has not been perfectly clarified. In this study, the fracture stress distribution is evaluated by tensile test of carbon fiber monofilaments. Furthermore, by using these results, the effect of twist number on tensile properties of the twisted carbon fiber multifilament is evaluated by carrying out the numerical simulation of dynamic model and compared with the experimental results.
