Abstract: By numerical simulation and single factor experiments, the injection warpage of composites reinforced with 30 % carbon fiber or 30 % glass fiber was studied. The influence of various parameters such as melt temperature, injection time, holding time, packing pressure on the warpage was also investigated through multivariate experiments.The results showed: the warpage based on 30 % carbon fiber was lower than that based on 30 % glass fiber, with the maximum warpage being 4.107 and 5.090 mm, respectively. The most effective processing parameter for carbon and glass fiber reinforced composites was packing pressure and holding time, respectively.

Key words: carbon fiber, glass fiber, composite, injection molded part, warpage deformation