Flap structural composites VARI fluid process molding simulation technology and experiments validation

In the process of composites fluid molding, the filling time and pressure of resin can be forecasted with using computer-aided simulation software, which can provide reference design for the real molding process of resin flow. The simulation of the resin flow had been carried out for flap structural composite by using PAM-RTM software. According to the Darcy's law, the formula of permeability was deduced when the resin flow along reinforce fiber. The permeability of carbon fiber and suture fiber was tested and revised respectively. The simulation of the resin flow was carried out by using several runner means. The final reasonable injection port and runner were chosen according to simulation results. The chosen means were verified by the process experims, also the structural component was tested by using ultrasonic nondestructive testing. The results show that the theoretical filling time is almost consistent with the filling time measured by the experiments. It is not found that the internal defect is existed in structural components. The resin filling is enough, to prove that the simulation is valid.