Numerical modeling and experimental studies for shape and dimensional control in the curing process of textile composites

This article reports the results of a study on the influence of process parameters on the dimensional features and shape of components made of textile composite materials. It derived from shape control requirements on components to be used in the aerospace industry (satellite antennas), which determine the differences between real and analytical surface reduction of electrical performances. In fact, the production of composite material components is based on a thermal process, which may produce internal stresses; if such stresses are not removed upon shakeout, they cause uncontrolled distortions of manufactured items. The study focused on the role played by given parameters and the various process procedures, which orient production choices. The use of a micro-structural numerical model provided a forecast of residual stresses at the fiber–matrix interface, while a global model showed the presence of global distortions. An initial experimental investigation made it possible to quantify the level of residual stresses and subsequent displacement values.