Path generation for filament winding of asymmetric fibre composite components.

Abstract

This thesis describes several fibre path prediction techniques used for filament winding of continuous fibre composite components. A literature review dealing with different aspects of CAD/CAM related to filament winding is provided. The insight gained through the review is used in the selection of specific path prediction techniques for two types of components. The mathematical technique is selected for surfaces of revolution while a geometric approach based on flat triangular patches is chosen for general asymmetric shapes. Since it can be used for a wider variety of components, this latter technique, along with the critical parameters affecting its performance, is described in greater detail. Three factors are shown to directly affect the accuracy of the predicted path. They are the starting condition, the separation distance between the actual surface and the triangle approximation and finally, the local curvature of the surface in the direction of the fibre path. A general discussion on the structure of the filament winding CAD environment in terms of hardware and software is also given.