One-dimensional Heat Transfer Study of A Fiber-reinforced Wind Epoxy Composite System in Vacuum Assisted Resin Transfer Molding Process

摘要

In this paper, in order to investigate the influence of cure behavior of a wind epoxy resin in vacuum assisted resin transfer molding (VARTM) process, numerical analysis of the heat transfer study of VARTM process was established to characterize the temperature distribution in one dimension by directly solving heat equation and compared with the result of experiment. Differential scanning calorimeter (DSC) was applied to test the curing kinetic parameters of the epoxy system, which is required to evaluate the internal thermal source and analyze the heat transfer equations. Two models were established to solve the heat transfer equation: the nth order curing model and the autocatalytic model. Combining the theoretical results with nth order curing model and experiment, it suggests that in the early stage, temperature distribution correlates well with the experiment which is due to the dominant chemical-controlled reaction while great discrepancy appears in the latter stage due to diffusion-controlled reaction taking over. While the result of the heat equation solved by autocatalytic model correlates well with the experiment result.