Title: TOW-PATH BASED MODELING OF WRINKLING DURING THE AUTOMATED FIBER PLACEMENT PROCESS
Abstract: Investigation of wrinkling within an arbitrary path for a composite tow constructed using the automated fiber placement process is presented. Governing equations and assumptions for a basic zeroth-order model are derived based on geometric considerations only, neglecting the elastic properties of the material, and formulated for an arbitrary curve on a general three-dimensional surface. A simple form of the wrinkled shape is assumed and applied to the inner edge of tow path, which might be steered tow on a smooth part surface or a straight path on complex doubly-curved part. The formulation is further simplified to describe the special case of a tow-path on a flat plate. A numerical solution is implemented within Mathematica to visualize the curved paths and to indicate potential regions for wrinkling on the surface. Several examples are presented to demonstrate the capability, including constant angle paths on a double-curved surface and curved paths on a flat surface.
Authors: Roudy Wehbe, Brian F. Tatting, Ramy Harik, Zafer Gürdal, Allen Halbritter, and Steven Wanthal
Conference: CAMX 2017 –Orlando