Unconventional Fibres Orientation Of CFRP Laminates

Typical structures of carbon-fiber-reinforced plastics consist of multiple layers arranged according to a particular sequence that give specific mechanical properties. Layers are organized with different angles, different sequences and different technological processes to obtain specific characteristics. Several researches study the strength variation of composites as function of a combination of some variable parameters, but up to now none of them focused the attention on a different way to arrange fibers. This paper analyzes a new parameter able to improve mechanical properties of composites, investigating a combination of through-the-thickness stitching and unconventional fibers arrangement. Generally, carbon fibers orientation refers to a Cartesian coordinate system, in which fibers are arranging in packages along different angle orientations respect to the zero lamina. In this paper a Polar coordinate system of continue carbon tow is introduced. It allows creating complex geometry components in an easy way.