A Physics-Based Modelling Framework for Simulation of Prepreg Tack in AFP Process
Fiber misalignment manifested in the form of wrinkles, puckers and fiber bridging are among the major issues encountered in the Automated Fiber Placement (AFP) process. The main driver for these defects is the residual stresses introduced in the tow by the AFP head during the deposition stage. Tack between the deposited tow and substrate is the resisting force against formation of such defects. Tack is a very complex phenomenon that is influenced by a variety of process parameters including temperature, head pressure and speed, as well as prepreg aging, moisture content and surface condition. A physics-based modelling framework for simulation of tack is developed in this study that allows for prediction of tack response.
Author: Alireza Forghani
Conference: SAMPE Seattle 2017