Next to the widely used Resin Transfer Moulding (RTM) and Compression Resin Transfer Moulding (CRTM), Resin Infusion (RI, also know as VARTM) is another subclass of the Liquid Composite Moulding (LCM) collective, that is increasingly applied in industry.RI utilises only one rigid mould half, the upper mould half of the mould being a flexible plastic bag.This makes tooling costs lower, and makes the process suitable for medium to large sized parts.The interaction between a flexible bag and the infusion of the laminate within, presents a significant challenge to model and understand.