A novel method for design and simulation of 3D woven preform

Increasing demand for high-performance applications of composite materials requires an integral forming process for complex components. As a composite reinforcement, 3D (three-dimensional) woven fabric has advantages in producing near-net-shaped preforms. However, previous studies focused on plates with uniform thickness, which are often variable thicknesses or special-shaped parts in practical applications. Some structures are prepared by stitching and then formed in the mold, but this increases the fiber damage. This study proposes a fabric design method based on yarn movement. By controlling the movement direction and distance of each yarn, the warp path in the fabric can be designed, which cause the change of fabric structure and achieve the integrated forming of special-shaped preforms. Based on this method, a software package for the preforms design and simulation is developed, which can be used for various woven and 3D textiles to illustrate its versatility.