NUMERICAL SIMULATION OF CURING DEGREE AND UNSTABLE TEMPERATURE FIELD DURING MODELING PROCESS OF POLYMER COMPOSITE MATERIALS

The relation between dynamic changes of curing degree and temperature is intensively coupled during the modeling process of polymer composite materials. On the basis of curing kinetics and thermal conduction theories, a mathematical model about temperature distribution and curing degree variation is established in this paper. Kinetics parameters based on the models are determined by using differential scanning calorimetry(DSC). A numerical model about temperature and curing degree was developed by combining the two-dimensional finite element with finite difference, and the coupled question is solved by using Euler step-by-step iterative method. The computer code is worked out according to the established model to simulate the distribution of temperature and curing degree closed to the test result, which provides the theoretical basis for optimizing practical process parameters.