Advanced Composite Materials

The Korean Society for Composite Materials (한국복합재료학회)
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Similarity Relations of Resin Flow in Resin Transfer Molding Process

  • Um, Moon-Kwang (Korea Institute of Materials Science, Composite Materials Group) ;
  • Byun, Joon-Hyung (Korea Institute of Materials Science, Composite Materials Group) ;
  • Daniel, Isaac M. (Departments of Civil and Environmental Engineering and Mechanical Engineering, Center for Intelligent Processing of Composites, Northwestern University)
  • Received : 2007.12.18
  • Accepted : 2008.05.09
  • Published : 2009.06.01
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Abstract

Liquid molding processes, such as resin transfer molding, involve resin flow through a porous medium inside a mold cavity. Numerical analysis of resin flow and mold filling is a very useful means for optimization of the manufacturing process. However, the numerical analysis is quite time consuming and requires a great deal of effort, since a separate numerical calculation is needed for every set of material properties, part size and injection conditions. The efforts can be appreciably reduced if similarity solutions are used instead of repeated numerical calculations. In this study, the similarity relations for pressure, resin velocity and flow front propagation are proposed to correlate another desired case from the already obtained numerical result. In other words, the model gives a correlation of flow induced variables between two different cases. The model was verified by comparing results obtained by the similarity relation and by independent numerical simulation.

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References

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