Rate of conversion, temperature variation and flow simulation of reactive liquid during RTM and SRIM mold filling
- Ecole Polytechnique, Montreal, Quebec (Canada)
- Aerospatiale, Suresnes (France)
In resin transfer molding (RTM) and structural reaction injection molding (SRIM) injection processes a liquid thermosetting resin is injected into a mold filled with a dry fibrous preform. The numerical simulation of RTM/SRIM filling consists generally of solving a Darcy`s flow model for a newtonian fluid in a porous medium using the finite element method. In several cases, reaction kinetics cannot be neglected and he combined effect on viscosity of the degree of conversion and the temperature increase resulting from the exotherm must be taken into account. In this paper, a new version of the non isothermal module implemented in RTMFLOT is presented. In this method, the kinetic of resin conversion is split into a set of subreactions modeled by the general Kamal equation. A global conversion level is calculated using a linear combination of these subreactions. The heat generated by the reaction is fed back in the temperature calculation, and the temperature-conversion dependency of the viscosity is used to achieve the overall coupling between the resin flow and the resin kinetics. A case study is presented to illustrate all the coupling links between the flow, the filling, the temperature and the conversion.
- OSTI ID:
- 109731
- Report Number(s):
- CONF-950521--; ISBN 1-56676-313-4
- Country of Publication:
- United States
- Language:
- English
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