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Abstract

This paper presents the mathematical theory, computational algorithm and numerical results from a finite element based Resin Transfer Molding (RTM) model, a process that involves resin impregnation of fiber preforms. The uniqueness of the present approach is that unlike the conventional methods, it treats the flow of resin and air as a two-phase flow in a porous media. The formulations are done in 3D without introducing approximations in the thickness direction. This approach enables the user to model the macrolevel physics better, formulates accurate filling of complex parts that may be thick or contain inserts, predicts air entrapment, and has the ability to incorporate heat transfer in both filled and unfilled regions.

Keywords

resin transfer molding two phase flow finite elements

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Finite Element Analysis of Three-Dimensional RTM Process

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