2018 Volume 44 Issue 1 Pages 9-18
Carbon fiber tape reinforced thermoplastics (CTT) have attractive features such as high formability and mechanical performance; however, CTT is known to have a lower strength and higher standard deviation of mechanical properties than continuous fiber composites for the same fiber volume fraction. In this study, a simulation model was developed to evaluate the tensile modulus and strength of CTT. Geometric parameters which were ignored in most of the previous studies, such as the resin-rich area and the variation in the number of UD tape layers, were considered. FEM (Finite Element Method) and the shortest path theory were adopted to evaluate the mechanical properties. The simulation results for the tensile modulus and strength agreed well with the experimental results obtained in previous studies. In the sensitivity analysis, the effect of the tape thickness was well expressed, while that of the tape length was too sensitive to specimen tensile strength in comparison with the experimental results. In addition, the standard deviation of the simulation results was higher than that of experimental results, indicating that further improvement in the simulation model is required for future practical applications.