3D MODELING OF TEXTILE COMPOSITE PREFORMS

The purpose of this paper is to present three-dimensional models of fa bric reinforcements for composite components by using computer aided g eometric design (CAGD) techniques. A novel approach to structural repr esentation of fabric preforms is described in both parametric and grap hic forms. The philosophy behind the development of the computer gener ated model of a composite fabric reinforcement is discussed. The model described here is a general one, capable of producing a 3D representa tion of any 2D and 3D fabrics. The computer program also provides a ve ry useful visualisation of the structure. Various structures of fabric s used as reinforcements for composite materials, such as woven, braid ed, knit, and multi-axial 3D weave, are demonstrated in virtual realis tic forms. (C) 1998 Elsevier Science Ltd. All rights reserved.