Cure Kinetics Modeller® was developed by LMAT to help in the design and optimisation of existing heating cycles. A novel model free kinetics interpolator was coupled with the 1 dimensional multilayered finite difference code allowing for quick estimation of temperature and cure gradient across the laminate thickness for various heating scenarios.
The application allows for precise control of ovens, autoclaves, cartage heaters and flexible heating elements. Instantaneous forecasting allows to shut down the system before any significant exotherm develops within the composite part.
The numerical procedure implemented to model the cure kinetics is based on the assumption that the reaction rate at any moment during cure is only a function of the fractional conversion and of the temperature. The validity of such an assumption can be verified by analyzing the effects of different thermal histories, corresponding to different fractional conversion trajectories, on the reaction rate, in cases where the conversions and the temperatures are identical despite different thermal histories. This can be achieved by comparing reaction rates measured at the same points of the conversion temperature phase space, by isothermal and dynamic calorimetry. The superposition of data obtained by dynamic experiments onto the isothermal reaction rate-conversion curves is illustrated in the figure below.