Abstract
Vacuum assisted Resin Transfer Molding (VaRTM) is a composite molding process by which resin is drawn through fiber preforms using a vacuum pressure. We proposed a method to measure resin impregnation in a VaRTM process non-intrusively on the basis of the ensemble Kalman filter (EnKF). In this method, the resin-impregnated region was estimated by a combination of measuring capacitances from a set of electrodes and a simulation of a VaRTM process. The proposed method was examined by a numerical experiment and it was confirmed that the flow velocity reduction in a low permeability region can be estimated.
