Simulating and optimizing of GFRP pultrusion process

In order to carry out a numerical simulation of the unstable temperature field and curing degree in the
pult rusion process of GFRP, a mathematical model was established for the variation of temperature dist ribution and curing degree on the basis of curing kinetic and unstable thermal conduction theories. The kinetics parameters based on the models are determined by using differential scanning calorimetry (DSC). A numerical model was established for the temperature and curing degree by combining the two-dimensional finite element with finite differential and the coupled question was solved by using Euler-Cauch step- by- step iterative method. The effect s of processing parameters including pulling speed, die wall temperature and initial temperature on the profile of curing degree and temperature in the die are discussed with the pult rusion simulation program compiled with FEPG. The result of the numerical simulation corresponds well to the FBG sensor test result, which provides useful information for the pultrusion design.