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Methodology Applied to Integrate a Viscosity Model for Liquid Composites Molding Simulation in PAM-RTM®

[+] Author Affiliations
Alex A. Skordos

Cranfield University, Cranfield, UK

Yann Duplessis Kergomard, Pierre Marquette, Patrick De Luca

ESI Group, Merignac, France

Paper No. ESDA2012-82096, pp. 11-19; 9 pages
doi:10.1115/ESDA2012-82096
From:
  • ASME 2012 11th Biennial Conference on Engineering Systems Design and Analysis
  • Volume 3: Advanced Composite Materials and Processing; Robotics; Information Management and PLM; Design Engineering
  • Nantes, France, July 2–4, 2012
  • Conference Sponsors: International
  • ISBN: 978-0-7918-4486-1
  • Copyright © 2012 by ASME

abstract

This work was performed in the frame of the european project INFUCOMP. This paper focuses on the development of a viscosity model for the epoxy systems Hexcel RTM6 and Cycom 890RTM, and the associated experimental data sets. A new modelling approach was developed based on the use of reference viscosity as a state variable instead of the conventionally used degree of cure. The new approach focuses on the time-temperature window of infusion processes, thus yielding higher accuracy results and a more efficient representation of rheological behaviour. Furthermore, the model can be integrated analytically under isothermal conditions, which carries advantages with regard to both parameter estimation and implementation within the context of process simulation. The model was then implemented in PAM-RTM simulation software. To do so, not only the aging of the resin had to be taken into account, but also the transport of this information with the flow. Last verification simulation tests were performed with LCM simulations.

Copyright © 2012 by ASME

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