FDM3DプリンターによるCFRTP作製と評価

抄録

The purpose of this study is to manufacture carbon fiber reinforced thermoplastic composites for aerospace and automotive applications. In order to accomplish this purpose, we produced carbon fiber pre-impregnated resin filament for FDM 3D printer. Moreover, we developed an FDM 3D printer that incorporates a mechanism to amputate continuous carbon fibers. We conducted a tensile test and bending test of an acrylonitrile butadiene styrene (ABS) specimen and a carbon fiber reinforced thermoplastic (CFRTP) specimen to evaluate dynamic characteristics of CFRTP shaped by FDM 3D printer. As a result, the tensile strength and modulus of longitudinal elasticity of the CFRTP specimen were found to be 4 and 4.8 times higher than those of the ABS specimen, respectively. The bending strength and bending modulus of longitudinal elasticity of the CFRTP specimen were found to be 2.9 and 5.1 times higher than those of the ABS specimen, respectively. We conducted cross-sectional observation of CFRTP specimen wherein resin-rich and resin non-impregnated spheres were observed. However, these values were lower than the theoretical values calculated from the law of mixtures. By examining the evidence, lower dynamic characteristics were concluded to result from the presence of the aforementioned spheres.