Effects of graphite fiber and epoxy matrix physical properties on the temperature profile inside their composite during cure

An investigation was made of the effects of graphite fiber and epoxy matrix physical properties on the temperature profile in their laminates during cure. An accurate prediction of temperature profiles within composites is of paramount importance in determining the processing conditions. In this study, a valid model for temperature profiles was established first. Then, three physical parameters of composites that change during cure, namely, density, heat capacity, and thermal conductivity, were varied in magnitude, and the ensuing effect on the temperature profile was examined. The range of their variation was based upon the values measured in the authors laboratory as well as those reported in the literature. Changes in the neat resin thermal conductivity were found to significantly influence the temperature profile.