Abstract: In this paper, we design the RTM manufacturing process of composite "I" section rib parts with PAM-RTM simulation. During the simulation process, we design 6 methods for manufacturing, considering infusion parameters, infusion ports and infusion types. Compare with simulation results including pressure distribution, resin permeation and infusion time of different methods, we get the optimum method. We manufacture the mold and the part after the simulation and comparison. The work and its results show that the position of "I" section rib affects the injection results including resin infiltration and efficiency less than injection port and mode selection. Line and root injection are better than point and tip injection. Simulation can help designing the molding of "I" section rib part and manufacturing instead of human-experiences to shorten the part manufacturing period and reduce the cost.

Key words: simulation, ", I", section rib, resin infiltration, infusion efficiency, injection mode, injection port